ENERGY AUDIT FINAL REPORT

Transcription

1 ENERGY AUDIT FINAL REPORT Anchorage School District Warehouse 4919 Vanburen Street Anchorage, AK p (907) AkWarm ID No. CIRI-ANC-CAEC F Street Anchorage, AK p (907) f (907) Contact: Walter K. Heins, PE, CCP, CxA, CEA Lakefront Drive Soldotna, Alaska p (907) Contact: Jerry P. Herring, PE, CEA

2 Contents I. Executive Summary... 1 II. Introduction... 5 III. Energy Audit Process... 6 IV. Method of Analysis... 7 V. Building Description... 9 V.I BUILDING ARCHITECTURAL DESCRIPTION... 9 V.II BUILDING MECHANICAL DESCRIPTION... 9 V.III BUILDING ELECTRICAL DESCRIPTION VI. Historic Energy Consumption and Cost VI.I ELECTRICAL CONSUMPTION DATA VI.II NATURAL GAS CONSUMPTION DATA VI.III OVERALL ENERGY CONSUMPTION DATA VII. Equipment Inventory and Photo Survey VIII. Energy Conservation Measures VIII.I WAREHOUSE ENERGY CONSERVATION MEASURES VIII.II ADMINISTRATIVE CONTROLS FOR ENERGY CONSERVATION AND OPTIMIZATION Appendices Appendix A Energy Benchmark Data Appendix B AkWarm Commercial Reports Appendix C Major Equipment List Appendix D Energy Conservation Measures Appendix E Site Visit Photos Appendix F Thermographic Photos Coffman Engineers, Inc. 6/11/2012 i

3 REPORT DISCLAIMER Privacy The information contained within this report, including any attachment(s), was produced under contract to Alaska Housing Finance Corporation (AHFC). IGAs are the property of the State of Alaska, and may be incorporated into AkWarm-C, the Alaska Retrofit Information System (ARIS), or other state and/or public information systems. AkWarm-C is a building energy modeling software developed under contract by AHFC. Limitations of Study This energy audit is intended to identify and recommend potential areas of energy savings, estimate the value of the savings, and provide an opinion of the costs to implement the recommendations. This audit meets the criteria of a Level 2 Investment Grade Audit (IGA) per the American Society of Heating, Refrigeration, Air-conditioning Engineers (ASHRAE) and the Association of Energy Engineers (AEE), and is valid for one year. The life of the IGA may be extended on a case-by-case basis, at the discretion of AHFC. In preparing this report, the preparers acted with the standard of care prevalent in this region for this type of work. All results are dependent on the quality of input data provided. Not all data could be verified and no destructive testing or investigations were undertaken. Some data may have been incomplete. This report is not intended to be a final design document. Any modifications or changes made to a building to realize the savings must be designed and implemented by licensed, experienced professionals in their fields. Lighting upgrades should undergo a thorough lighting analysis to assure that the upgrades will comply with State of Alaska Statutes as well as Illuminating Engineering Society (IES) recommendations. All liabilities for upgrades, including but not limited to safety, design, and performance are incumbent upon the professional(s) who prepare the design. Coffman Engineers, Inc (CEI) and Central Alaska Engineering Company (CAEC) bear no responsibility for work performed as a result of this report. Financial ratios may vary from those forecasted due to the uncertainty of the final installed design, configuration, equipment selected, installation costs, related additional work, or the operating schedules and maintenance provided by the owner. Furthermore, many ECMs are interactive, so implementation of one ECM may impact the performance of another ECM. CEI and CAEC accept no liability for financial loss due to ECMs that fail to meet the forecasted financial ratios. The economic analyses for the ECMs relating to lighting improvements are based solely on energy savings. Additional benefits may be realized in reduced maintenance cost, deferred maintenance, and improved lighting quality. The new generation lighting systems have significantly longer life leading to long term labor savings, especially in high areas like Gyms and exterior parking lots. Lighting upgrades displace re-lamping costs for any fixtures whose lamps would otherwise be nearing the end of their lifecycle. This reduces maintenance costs for 3-7 years after the upgrade. An overall improvement in lighting quality, quantified by numerous studies, improves the performance of students and workers in the built environment. New lighting systems can be designed to address all of the above benefits. US Government Disclaimer This material is based upon work supported by the Department of Energy under Award Number DE-EE This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Coffman Engineers, Inc. 6/11/2012 ii

4 I. Executive Summary This report presents the findings of an energy audit conducted at the Anchorage School District (ASD) Warehouse building as part of a contract for: Alaska Housing Finance Corporation Contact: Rebekah Luhrs 4300 Boniface Parkway Anchorage, AK rluhrs@ahfc.us Anchorage School District Contact: Calvin Mundt 1301 Labar Street Anchorage, AK mundt_calvin@asdk12.org This audit was performed using American Recovery and Reinvestment Act (ARRA) funds to promote the use of innovation and technology to solve energy and environmental problems in a way that improves the State of Alaska s economy. This can be achieved through the wiser and more efficient use of energy. The average January 2009-December 2010 documented annual utility costs at this facility are as follows: Electricity $55,190 Natural Gas $20,916 Total $76,106 January 2009 December 2010 Energy Utilization Index (EUI) = 61.2 kbtu/sf January 2009-December 2010 Energy Cost Index = 1.27 $/sf Energy Conservation Measures (ECMs) calculated to be cost effective are shown below in the Executive Summary Table with the energy analyst s best opinion of probable cost, savings, and investment returns. Be aware that the measures are not all additive because of the interrelation of several of the measures. The cost of each measure for this level of auditing is ± 30% until detailed engineering, specifications, and hard proposals are obtained. See section VIII for detailed descriptions of all cost effective ECMs. Coffman Engineers, Inc. 6/11/2012 1

5 Executive Summary Recommended Energy Conservation Measures (ECMs) Warehouse Building Rank Feature Recommendation 0 a Refrigerators Replace Refrigerators older than 5 years old Annual Energy Savings Installed Cost SIR Payback (years) <10 years 1 Lighting: Exterior Lighting Replace with 12 LED Light Fixtures $895 $ Air Tightening Perform air sealing to reduce air leakage by 30%. 3 b HVAC Replace pumps P-3 and P-31 with new EC motors $3,221 $10, $670 $4,500 c Lighting: Restrooms 5 Lighting: Office Spaces and Corridors Replace with 9 FLUOR T8 4' F32T8 32W Electronic Ballast and Add new Occupancy Sensors Replace with 108 FLUOR T8 4' F32T8 32W Electronic Ballast; and Add new Occupancy Sensors where applicable $201 $1, $2,237 $18, Ventilation Install new high efficiency restroom fan motor that is controlled based on restroom occupancy and timer. Upgrade battery charging station fan to new high efficiency unit. $572 $4, Coffman Engineers, Inc. 6/11/2012 2

6 Executive Summary Recommended Energy Conservation Measures (ECMs) Warehouse Building Rank Feature Recommendation 7 b HVAC Remove FAF-1,2,3 and install AHU-1, 2 and 4 systems per 2007 Mechanical Drawings. Remove electric heat from offices and science kit area. Annual Energy Savings Installed Cost SIR Payback (years) $10,895 $100, HVAC And DHW 9 Lighting: Warehouse 10 Garage Door: South Overhead Door - Hollow Wood 11 Garage Door: West Overhead Doors - Hollow Wood Add control valves to 19 Unit Heaters and add VFDs to P-1A and P-1B Replace the incandescent exit signs with led source exit signs and replace all T12 light fixtures with T8 and T5HO light fixtures. Replace existing garage door with R-7, 2" polyurethane core replacement door. Replace existing garage door with R-7, 2" polyurethane core replacement door. $2,148 $20, $940 $9, $63 $ $127 $1, b Overhead Door Remove decommissioned east facing overhead door and replace with R-20 minimum wall system. $80 $1, Coffman Engineers, Inc. 6/11/2012 3

7 Executive Summary Recommended Energy Conservation Measures (ECMs) Warehouse Building Rank Feature Recommendation 13 Above-Grade Wall: Exterior Walls - Metal Building with 3.5" FB Over the Purlin Install R-13 fiberglass batts in empty 2x4 cavity. Annual Energy Savings Installed Cost SIR Payback (years) $3,055 $65, Lighting: Bay Area Work Station Replace with 13 FLUOR T8 4' F32T8 32W Electronic Ballasts $130 $1, Note: a Due to advances in refrigerators in the last 5 years, new Energy Star refrigerators are significantly more efficient than previous models. Replacing existing refrigerators, which are older than 5 years, with new energy star models will typically have paybacks of less than 10 years. b ECM item was modeled with a separate AkWarm model and as a result the item is not an additive measure in AkWarm. It is therefore not included in the final cost savings total in the final AkWarm model in the Appendix D. Coffman Engineers, Inc. 6/11/2012 4

8 II. Introduction This energy audit was conducted for the Anchorage School District (ASD) Warehouse building, a 60,000 square feet (sf) building located in Anchorage, AK. The energy audit was conducted in order to evaluate areas and equipment where utility savings relative to a baseline can be realized with reasonable project financial ratios and payback. Anchorage, Alaska Google Maps ASD Warehouse Building Google Maps Coffman Engineers, Inc. 6/11/2012 5

9 III. Energy Audit Process Prior to visiting the building, the first task was to collect and review two years of utility data for electricity and natural gas usage. This information was used to analyze operational characteristics, calculate energy benchmarks for comparison to industry averages, estimate savings potential and establish a baseline to monitor the effectiveness of implemented measures. A spreadsheet was used to enter, sum, and calculate benchmarks and to graph energy use information (see Appendix A). The primary benchmark calculation used for comparison and baseline data is the Energy Utilization Index, or EUI (see Section VI). After gathering the utility data and calculating the EUI, the next step in the audit process was to review the architectural and engineering drawings to develop a building profile which documented building age, type, usage, and major energy consuming equipment or systems such as lighting, Heating, Ventilating, and Air Conditioning, (HVAC), water heating, refrigeration, snow-melt, and etc. The building profile is utilized to generate, and answer, all possible questions regarding the facility s energy usage. These questions were then compared to the energy usage profiles developed during the utility data gathering step. After this information was gathered, the next step in the process was the physical site investigation (site visit). The site visit was completed on July 22, 2011 with a follow-up visit on October 6, 2011, and was spent inspecting the actual systems and answering specific questions from the preliminary review. The on-site contact during the investigation was Mr. Derek Bell a, foreman at the ASD Warehouse. Occupancy schedules, O&M practices, building energy management program, and other information that has an impact on energy consumption were obtained. After the site visit, the energy audit includes evaluation of the information gathered, researching possible conservation opportunities, organizing the audit into a comprehensive report, and making ECM recommendations for mechanical, electrical and building envelope improvements. a Mr. Derek Bell, (907) (office) Coffman Engineers, Inc. 6/11/2012 6

10 IV. Method of Analysis Having completed the preliminary audit tasks noted in Section III, Coffman Engineers, Inc. (CEI) conducted a site survey. The site survey provides critical input in deciphering where energy opportunities exist within the facility. The audit team walked the entire site to inventory and investigate the building envelope and major equipment, including: HVAC, water heating, lighting, and equipment located in warehouse, office, and ancillary spaces. An understanding of how the major equipment is used is determined during the audit. The collected data was entered into AkWarm Commercial software, an energy calculating program for buildings. The data was processed by AkWarm to model a baseline from which ECMs could be considered. The model was compared to actual utility costs to ensure the quality of baseline and proposed energy modeling performed by AkWarm. The recommended ECMs focus on building envelope, HVAC, lighting, water heating, and other electrical measures that will reduce annual energy consumption. ECMs are evaluated based on building use and processes, local climate conditions, building construction type, function, operational schedule, existing conditions, and foreseen future plans. When new equipment is proposed, energy consumption is calculated based on the manufacturer s cataloged information where possible. Energy savings are calculated by AkWarm. Implementation of more than one ECM often affects the savings of other ECMs. The savings may in some cases be relatively higher for an ECM implemented individually than when that ECM is just one of multiple recommended ECMs. For example, implementing reduced operating schedules of inefficient lighting systems may result in a given savings. Also implementing a more efficient lighting system will add to the savings, but less than the efficient lighting would alone because there is less energy to be saved when the lights are on a reduced operating schedule. Thus, if multiple ECM s are recommended, the combined savings must be calculated and identified appropriately in groups. In Appendix D, Energy Conservation Measures, the simple lifetime calculation is shown for each ECM, which is based on the typical life of the equipment being replaced or altered. The energy savings are extrapolated throughout the simple lifetime of the ECM. The total energy savings are calculated as the total lifetime multiplied by the yearly energy savings. The cost savings and installation costs are used to calculate simple payback b and the Savings to Investment Ratio c (SIR). These are listed in Appendix D and summarized in the Executive Summary Table of this report. The SIR is calculated as a ratio by dividing the break even cost by the initial installed cost. Cost savings is calculated based on the historical energy costs for the building. Installation costs include labor and equipment to evaluate the initial investment required to implement an ECM. These are b The simple payback is based on the years that it takes for the net savings to payback the net installation cost (Cost divided by Savings). c Savings to Investment Ratio (SIR): Break Even Cost divided by initial installed cost, where Break-Even Cost is how much can be spent and still have the measure be cost effective; it equals the Present Value (PV) of Savings over the life of the measure minus PV of maintenance costs. Coffman Engineers, Inc. 6/11/2012 7

11 applied to each recommendation with simple paybacks calculated. The energy analyst s opinions of probable cost are garnered from RS Means Cost Data, other industry publications, and local contractors and suppliers. In addition, where applicable, maintenance cost savings are estimated and applied to the net savings. Coffman Engineers, Inc. 6/11/2012 8

12 V. Building Description The ASD Warehouse building is a large 60,000 sf metal frame building containing both warehouse and office space. The building was constructed in 1973 and is used by the ASD for storing materials used in the ASD schools. The building is regularly occupied by a total of 40 people from 7am to 5pm everyday from Monday through Friday, year round. V.I Building Architectural Description The construction of the Warehouse is typical of large metal building structures in Anchorage. The exterior walls utilize large metal framing members with over-the-purlin, foil faced, fiberglass batt insulation draped between the metal purlins. This causes the thickness of the fiberglass insulation to vary from 3-1/2 at its thickest point, to less than a ½ where it is attached to and compacted flat against the purlins. The insulation value for this wall system is quite low, as many thermal bridges occur where the purlin and wall siding compact the batt insulation. See the thermal images of the wall in the Appendix E, to view these thermal breaks. An effective insulation value of R-8 was estimated for the building s walls based on significant thermal bridging. There is 21,600 sf of exterior wall area. The floor of the building is a 5 thick concrete slab with no under floor insulation. According to original architectural drawings, the interior side of the foundation wall has 1 EPS rigid insulation that extends two feet down the wall from the floor. There is 60,000 sf of slab on grade floor area for the building with an average R-value of R-17. The roof of the building consists of over-the-purlin, foil faced, fiberglass batt insulation, similar to that of the exterior walls, with a built up membrane roof over the top. The over-the-purlin insulation varies in thickness like the exterior walls, with 3-1/2 at its thickest part and less than ½ where it is attached to the purlins. The insulation in the built up roof above the fiberglass batts could not be visually inspected, however, it is estimated to be 5 of polyisocyanurate insulation. The total insulation value of the roof system is R-33.8 and the roof area is 60,180 sf. The exterior windows of the building are ½ air space, double pane, metal frame windows with no thermal breaks. The insulation value of the windows was modeled as R-1.2, with 399 sf of window area. There are several different types of exterior man doors and overhead garage doors in the building. The west and north man doors are hollow metal doors with paper honeycomb insulation inside (R-1.8). The two south man doors are metal doors with urethane insulation cores. One of the two south doors has a double pane half lite window (R-3.3), the other door has no window (R-5.3). There are five overhead garage doors used for loading and unloading freight from trucks. Two of the overhead doors are new thermacore doors (R-6.7). The other three doors are hollow wood doors with no insulation (R-1.8). Currently, the east facing hollow wood door is unused due to the fact that the exterior access to the east side of the building has been removed. This door is a good candidate for removal and replacement with an insulated wall. V.II Building Mechanical Description A major upgrade to the Warehouse building mechanical system was completed in , which included adding boilers B-1 and B-2, AHU-3, nineteen ceiling mounted hydronic unit heaters and a large Coffman Engineers, Inc. 6/11/2012 9

13 ventilation system (EF-1) for the loading dock. These mechanical components are controlled by a new Siemens APOGEE Direct Digital Control (DDC) system. However, the building s existing forced air furnaces (FAF 1,2,3 and 4) were not upgraded and still remain. The building is heated primarily with one AERCO natural gas fired, high efficiency boiler (B-2). A Weil McLain dual fuel, gas-oil, boiler (B-1) is used for back up and operates when boiler B-2 cannot meet the building load, or in an emergency situation when natural gas is unavailable. Currently, the boilers send heated water to 19 ceiling mounted unit heaters and to a heating coil in AHU-3. The ceiling mounted unit heaters supply heat to the open warehousing areas. while heated water supplied to AHU-3,via a heat exchanger, provides heat to the northwest side of the warehouse. FAF-1, 2, and 3 are gas-fired, forced air furnaces located on the mezzanine above the west office space and provide tempered supply air to the west offices. The west offices also utilize perimeter electric resistance baseboard heaters for space heating. The electric baseboards have individual dial thermostats on the top of the units. The science kit area is an office area inside the south area of the open warehouse. The workstations in this area are also heated with electric resistance baseboard and electric overhead heaters. FAF-4 is a gas-fired furnace that supplies tempered air to the science kit area, however, this unit is currently in a state of disrepair and is not utilized at this time. The domestic hot water for the building is supplied by two 50 gallon hot water heaters. One water heater is a State Industries, standard updraft, natural gas fired unit located in the mezzanine area next to FAF-1. This unit serves the domestic hot water for the west office spaces. The second water heater is an A.O. Smith electric water heater and is located above the bathrooms adjacent to the science kit area. This unit provides domestic hot water to the science kit area. The domestic hot water consumption of the building was estimated at 40 gallons per day, based on typical office usage patterns developed by ASHRAE. V.III Building Electrical Description The office spaces in the Warehouse building are comprised of break room areas, private offices, large multiple occupant offices, conference rooms, copy areas, corridors and restrooms. These areas are primarily illuminated by fluorescent T12 light fixtures that are controlled by wall mounted rocker switches. During the site visit it appears that many of these lights remain on the entire time that the building is occupied even if the particular space is not. The lighting in the private offices, conference rooms, copy areas, and restrooms could be controlled with occupancy sensors to reduce energy consumption during unoccupied periods. The Warehouse section of the building has both high bay storage areas and work stations. The high bay areas are illuminated with both metal halide and 8' T12 high output fluorescent light fixtures. The high bay fixtures remain illuminated the entire time that the building is occupied. The work stations in the warehouse are lit via 4' fluorescent T8 and T12 light fixtures, as well as small task lights; these lights are all controlled locally with rocker switches. The work station lights appeared to be manually controlled and were observed during both audits. Exterior lighting is provided by several small high pressure sodium (HPS) wall pack light fixtures. The HPS lights are controlled by a photocell that switches the lights off during the day, and then on again for the duration of the night. Coffman Engineers, Inc. 6/11/

14 Other electricity-using equipment not previously described in the mechanical or electrical sections include a microwave and various breakroom kitchen equipment, and various user equipment such as, computers, and printers. Significant electrical loads are due to pallet jack and forklift charging stations, which for the purposes of this audit are considered process loads and cannot easily be optimized or reduced without impacting workflow of users of the facility. Coffman Engineers, Inc. 6/11/

15 VI. Historic Energy Consumption and Cost Tables provided in Appendix A, Energy Benchmark Data Report, represent the electric and natural gas energy usage for the surveyed facility from January 2009 to December Chugach Electric provides the electricity and ENSTAR provides the natural gas to the facility. Both utilities bill under their commercial rate schedules. VI.I Electrical Consumption Data The electric utility costs consist of several components: a fixed monthly customer charge, an energy usage charge, fuel surcharge, taxes, and a demand charge. The energy usage and fuel surcharge are based on the customer's usage as measured in kilowatt-hours (kwh). The usage (kwh) is determined by load wattage divided by 1,000, times hours running. For example, a 1,000 watt load operating for one hour will use 1 kwh of electricity as would ten, 100 watt lamps operating for one hour or one, 100W lamp operating for 10 hours. One kwh is equivalent to 3,413 BTU. Utility data used in this report reflects the historical data provided for the building in a summarized format. VI.II Natural Gas Consumption Data The natural gas supplier bills for consumption in CCF of natural gas; where one CCF equals 100 cubic feet of natural gas. The average heating value of natural gas is 1,000 BTUs per cubic foot, making 1 CCF equal to 100,000 BTUs (also called one Therm ). VI.III Overall Energy Consumption Data The overall cost for energy use is calculated by dividing the total cost by the total usage. Based on the electric and natural gas utility data provided, the average cost for the energy and consumption calculations at the surveyed facility are summarized in the table below. Energy Cost and Consumption Data Average Electric Rate $0.14 /kwh $0.11 /kwh $0.12 /kwh Natural Gas Rate $1.02 /CCF $0.94 /CCF $0.98 /CCF Total Cost $83,060 $69,185 $76,106 ECI $1.38 /sf $1.15 /sf $1.27 /sf Electric EUI 25.5 kbtu/sf 25.4 kbtu/sf 25.4 kbtu/sf Natural Gas EUI 35.8 kbtu/sf 35.6 kbtu/sf 35.7 kbtu/sf Building EUI 61.4 kbtu/sf 61.0 kbtu/sf 61.2 kbtu/sf The Energy Cost Index (ECI) is derived by dividing the annual cost by the building square footage. The square footage of the Warehouse building was calculated to be 60,000 sf. The annual EUI is expressed in Thousands of British Thermal Units per Square Foot (kbtu/sf) and can be used to compare energy consumption of similar building types or to track consumption from year to year in the same building. The EUI is calculated by converting annual consumption of all fuels used to Btu s and then dividing by the area (gross conditioned square footage) of the building. EUI is a good indicator Coffman Engineers, Inc. 6/11/

16 of the relative potential for energy savings. A comparatively low EUI indicates less potential for large energy savings. Building architectural, mechanical, and electrical drawings were obtained and utilized to calculate and verify the gross area of the facility. The gross area was confirmed on the physical site investigation. Coffman Engineers, Inc. 6/11/

17 VII. Equipment Inventory and Photo Survey Following the completion of the field survey a detailed equipment list was created and is attached as Appendix C. The major equipment listed are considered to be the major energy consuming equipment in the building whose replacement could yield substantial energy savings. An approximate age was assigned to the equipment if a manufactured date was not shown on the equipment s nameplate. As listed in the 2011 ASHRAE Handbook for HVAC Applications, Chapter 37, Table 4, the service life for the equipment along with the remaining useful life in accordance to the ASHRAE standard are also noted in the equipment list. Where there are zero (0) years remaining in the estimated useful life of a piece of equipment, this is an indication that maintenance costs are likely on the rise and more efficient replacement equipment is available which will lower the operating costs of the unit. Maintenance costs should also fall with the replacement. Photos of various equipment and the building construction were taken during the site visit. Several photos detailing the equipment and building are included in Appendix E. CEI made miscellaneous thermographic images of the building using a FLIR300 Infrared Camera. This is not a thermographic study, but rather several photographs to illustrate easy to identify heat losses. These photographs are included in Appendix F. Coffman Engineers, Inc. 6/11/

18 VIII. Energy Conservation Measures VIII.I Warehouse Energy Conservation Measures ECM-0 Replace Refrigerators Older than 5 years Old Annual Energy Savings Installed Cost SIR Payback (years) <10 years Due to recent advances in refrigerators in the last 5 years, new Energy Star refrigerators are significantly more efficient than previous models. Replacing existing refrigerators, which are older than 5 years old, with new energy star models will typically have paybacks of less than 10 years. ECM-1 Upgrade the Exterior Lighting Annual Energy Savings Installed Cost SIR Payback (years) $895 $ There are approximately 12 HPS wall pack light fixtures lighting the exterior of the warehouse building. These light fixtures may be replaced with LED source wall pack fixtures which may result in significant energy savings. This description is for a compilation of several ECM s that are intended to be implemented at the same time, however due to constraints with the AKWarm modeling software the different lighting configurations were modeled separately. See measures 1 and 3 in Appendix D for details of individual measures. ECM-2 Air Tightening Annual Energy Savings Installed Cost SIR Payback (years) $3,221 $10, By tightening the building envelope with air sealing improvements, infiltration into the building will be reduced. This in turn will reduce the heating load required by the building and reduce the amount of natural gas being burned by the boilers. While a blower door test was not completed, it is anticipated that air leakage is occurring though old weather stripping around doors, window frames, and wall and roof penetrations. Methods to decrease the infiltration into the building include: sealing around the windows and doors with caulking and insulation, adding new weather stripping to doors, providing gaskets to all exterior cover plates and sealing all roof and wall penetrations. See item 2 in Appendix D for more information. Significant air leakage was also found at the four roof vents in the Warehouse building. A photo of the roof vent is shown in photo 8 in Appendix E. Each vent has a manually operated damper that is opened and closed with a set of ropes. These dampers do not seal well when closed, and appear to be left open most of the time. Additionally, these vents are at the highest part of the roof, contributing to heat loss associated with the stack effect. According to building occupants the vents are rarely needed for ventilation, as the warehouse doors are opened for cross ventilation and cooling if needed. It is recommended that these four vents be removed and replaced with an air tight, insulated roof. Coffman Engineers, Inc. 6/11/

19 ECM-3 - New EC Pumps for P-3 and P-31 Annual Energy Savings Installed Cost SIR Payback (years) $670 $4, The two existing circulation pumps (P-3 and P-31) are constant speed pumps. New, high-efficiency pumps with electronically commutated (EC) motors have integral speed controls which read system demand, allowing the pump to slow down with significant electrical savings. Replacing the existing pumps with new pumps with EC motors now (while the existing motors are still functional) will result in an $8,300 replacement cost with an annual energy savings of $670, and a simple payback of 12.4 years. However, upgrading to pumps with EC motors when the existing pumps fail and are in need of repair will offer a much better payback because the marginal cost of the high efficiency EC motor over the standard replacement is only a $4,500 repair cost. This repair cost offers a simple payback of 6.7 yrs, resulting in an SIR of The repair upgrade is recommended as it is the most cost effective option. This ECM item was modeled with a separate AkWarm model and as a result the item is not an additive measure in AkWarm. It is therefore not included in the final cost savings total in the final AkWarm model in Appendix D. ECM-4 Upgrade the Lighting in the Restrooms Annual Energy Savings Installed Cost SIR Payback (years) $201 $1, There are two bathrooms in the warehouse building with a small hallway that connects them with the warehouse floor. Energy savings can be experienced if the approximately nine fluorescent T12 light fixtures are upgraded with T8 lamps and controlled by three occupancy sensors. This description is for a compilation of several ECM s that are intended to be implemented at the same time, however due to constraints with the AKWarm modeling software the different lighting configurations were modeled separately. See measures 5, 6, 9, 13, and 27 in Appendix D for details of individual measures. Note AkWarm measures with SIRs less than one were included in this compiled annual energy savings, installed cost, SIR, and payback of this since they should be upgraded congruently. Coffman Engineers, Inc. 6/11/

20 ECM-5 Upgrade the Lighting and Control Systems in the Office Spaces, and Corridors Annual Energy Savings Installed Cost SIR Payback (years) $2,237 $18, Upgrading the lighting in the office spaces and corridors includes replacing and retrofitting approximately 100 four lamp, and eight 2-lamp fluorescent T12 light fixtures with T8 light fixtures equipped with program start electronic ballasts. Approximately nine occupancy sensors could be used to control approximately 63 fixtures in small offices, conference and copy room type areas for additional savings. The remaining 45 fixtures would be controlled with the existing manual switches because they illuminate common use areas that should not be controlled by occupancy sensors. This description is for a compilation of several ECM s that are intended to be implemented at the same time, however due to constraints with the AKWarm modeling software the different lighting configurations were modeled separately. See measures 4, 7, 8, 10, 15, 23, and 29 in Appendix D for details of individual measures. Note AkWarm measures with SIRs less than one were included in this compiled annual energy savings, installed cost, SIR, and payback of this since they should be upgraded congruently. ECM-6 Upgrade Exhaust Fans for Restrooms and Charging Station Annual Energy Savings Installed Cost SIR Payback (years) $572 $4, Significant savings exist by upgrading the fan motors of the restroom fan and charging station fan and controlling the run time of the restroom fan. Currently, the existing restroom fan operates continuously. Replacing the old fan motor with a new, high-efficiency, motor will save electricity consumption. Also, adding restroom occupancy and timer control to the restroom exhaust fan will allow it to shut off during times when it is not needed. This will reduce the amount of heated air leaving the building envelope and therefore reduce the natural gas and electricity needed to heat incoming air. Replacing the existing fan motor of the exhaust fan at the battery charging station will also reduce electrical consumption. See item 11 in Appendix D for more information. ECM-7 Remove Forced Air Furnaces and Install New AHUs Annual Energy Savings Installed Cost SIR Payback (years) $10,895 $100, The office space and science kit area of the Warehouse are heated with perimeter electric baseboards. Electric heat is expensive compared to heating with natural gas and significant cost savings can be achieved by switching from electric to natural gas heating in these office areas. Also, due to the fact that each electric baseboard register has an individual thermostat, controlling the heat in the office spaces is difficult. Night setback control is difficult with the existing electric baseboards. The office spaces are also being supplied with tempered supply air through four natural gas-fired forced air furnaces (FAF-1, 2, 3, and 4). However, these furnaces are old with low combustion efficiencies. Coffman Engineers, Inc. 6/11/

21 A solution to the issues mentioned above, would be to follow through with the remaining upgrades shown in the Heating System Upgrades for ASD Warehouse mechanical design, dated 11/26/2007. This mechanical design was only halfway constructed in 2008, which included the successful completion of a new boiler room, new boilers, ceiling hydronic unit heaters and AHU-3. However, the mechanical design for removing FAF-1, 2, and 3 and installing AHU-1, 2 and 4, with hydronic heating coils utilizing heat from the new boilers, was never completed. Instead the insulated copper hydronic lines running to the proposed locations of AHU-1, 2 and 4 were stubbed-off, for future completion of the project. By continuing with the heating system upgrades shown in the 2007 mechanical design, the amount of natural gas used will be reduced as the heat generated by the inefficient forced air furnaces will be replaced by the heat produced from the high efficiency boiler system. The heat will be delivered via the hydronic heating coils in the new AHUs. Also, if adequately designed, the heat supplied by the new AHUs would have the ability to offset the need for electric heating by the electric baseboards in the office areas. If the heating coils in the AHUs were used as the primary heat source for the office space then the need for electric baseboard would be eliminated, resulting in significant electrical savings. Once this system is installed, additional savings can be realized by adding set back thermostats to reduce temperatures in the office space during unoccupied times. This ECM item was modeled with a separate AkWarm model and as a result the item is not an additive measure in AkWarm. It is therefore not included in the final cost savings total in the final AkWarm model in the Appendix D. ECM -8 Add Control Valves to Unit Heaters and Add VFDs to Main Circ Pumps Annual Energy Savings Installed Cost SIR Payback (years) $2,148 $20, The existing ceiling mounted hydronic unit heaters that supply heat to the open warehousing area are piped in an inefficient manner. Currently, the main circulation pumps, P-1A and P-1B, pump hot water through the radiators of the unit heaters constantly, regardless of the temperature found in each unit heater s zone. This results in unneeded heat radiating out of the unit heater radiators. This also wastes pumping energy required to push water through the unneeded radiators. See Appendix F for a thermographic photo of the waste heat coming off the unit heater. It is recommended that 2-way control valves be added to the unit heaters, with a by-pass at the end of each line. The thermostatically operated control valves will stop heated water from entering the unit heater s radiator when the zone is not calling for heat, in turn reducing the amount of waste heat produced by the unit heaters. It is recommended that VFDs be installed on pumps P-1A and P-1B so that the pumps can modulate in order to satisfy the heating load of the system. This will reduce electricity used for pumping. See item 14 in Appendix D for more information. ECM-9 Upgrade the Lighting in the Warehouse Annual Energy Savings Installed Cost SIR Payback (years) $940 $ Upgrading the lighting in the warehouse would include replacing the approximately two 4 two lamp wrap around fluorescent T12 light fixtures with two lamp T8 light fixtures, and replacing the approximately two incandescent emergency exit signs with LED source emergency exit signs. Additionally the fluorescent T12 high bay light fixtures may be replaced with 4 lamp fluorescent T5HO Coffman Engineers, Inc. 6/11/

22 high bay light fixtures. The cost of upgrading the fluorescent T12 lamps disregards much of the installation cost as it is assumed that the replacement will take place upon lamp failure, so much of the labor cost may be absorbed as a maintenance cost. Other possible upgrades were explored such as replacing the high bay metal halide light fixtures with fluorescent T5HO light fixtures but the upgrades did not prove to be cost effective. This description is for a compilation of several ECM s that are intended to be implemented at the same time, however due to constraints with the AKWarm modeling software the different lighting configurations were modeled separately. See measures 12, 16 and 19 in Appendix D for details of individual measures. ECM-10 Replace One South Facing Wood Overhead Garage Door Annual Energy Savings Installed Cost SIR Payback (years) $63 $ There is one south facing, 8 x 10 hollow wood overhead garage door in the Warehouse that is uninsulated (R-1.8). It is recommended that the door be removed and replaced with a new R-7 minimum, 2 polyurethane core garage door. The door should have adequately installed brush weather-stripping and rubber bottom gaskets to prevent air infiltration around the perimeter of the door. See item 17 in Appendix D for more information. ECM-11 Replace Two West Facing Wood Overhead Garage Doors Annual Energy Savings Installed Cost SIR Payback (years) $127 $1, There are two west facing, 8 x 10 hollow wood overhead garage doors in the Warehouse that are uninsulated (R-1.8). It is recommended that both doors be removed and replaced with new R-7 minimum, 2 polyurethane core garage doors. The doors should have adequately installed brush weather-stripping and rubber bottom gaskets to prevent air infiltration around the perimeter of the doors. See item 18 in Appendix D for more information. ECM-12 Replace East Facing Wood Overhead Door with Insulated Wall Annual Energy Savings Installed Cost SIR Payback (years) $80 $1, The Warehouse has one east facing, 8 x 10 hollow wood overhead garage door which is un-insulated (R-1.8). This door is not used anymore because exterior access to the decommissioned railroad tracks on the east side of the building is no longer needed. This door is contributing to heat loss and should be removed and replaced with an R-20 minimum insulated wall. Installing an insulated wall will reduce air leakage and conductive heat loss. See photo 6 in Appendix E for a picture of the unused door. This ECM item was modeled with a separate AkWarm model and as a result the item is not an additive measure in AkWarm. It is therefore not included in the final cost savings total in the final AkWarm model in the Appendix D. Coffman Engineers, Inc. 6/11/

23 ECM-13 Install R-13 Minimum Insulation to All Exterior Walls Annual Energy Savings Installed Cost SIR Payback (years) $3,055 $65, Due to the metal building construction and over-the-purlin insulation in the warehouse, the exterior walls are poorly insulated with an effective insulation value of R-8. It is recommended that an additional layer of R-13 minimum insulation be added to the inside face of all exterior walls. Insulating metal buildings such as the Warehouse can be done with pre-made, vinyl faced fiberglass insulation ordered from a manufacturer. The insulation is made to fit in the space between the purlins over the inside face of the existing wall insulation. The tabs on the vinyl faces can be taped to create a new vapor barrier. Significant savings can be achieved by increasing the insulation of the walls of the building envelope. See item 22 in Appendix D for more information. ECM-14 Upgrade the Lighting in the Warehouse Bay Area Work Stations Annual Energy Savings Installed Cost SIR Payback (years) $130 $1, The warehouse bay area houses several work stations. Upgrading the lighting in these areas would include upgrading approximately 13 fluorescent T12 light fixtures to use T8 sources. Additionally there is an incandescent desk lamp that may be re-lamped with a compact fluorescent or LED lamp. This description is for a compilation of several ECM s that are intended to be implemented at the same time, however due to constraints with the AKWarm modeling software the different lighting configurations were modeled separately. See measures 20, 21, 26, and 30 in Appendix D for details of individual measures. Note AkWarm measures with SIRs less than one were included in this compiled annual energy savings, installed cost, SIR, and payback of this since they should be upgraded congruently. Coffman Engineers, Inc. 6/11/

24 VIII.II Administrative Controls for Energy Conservation and Optimization While the intent of many energy conservation measures is to increase the efficiency of fuel-burning and electrical equipment, an important factor of energy consumption lies in the operational profiles which control the equipment usage. Such profiles can be managed by administrative controls and departmental leadership. They determine how and when fuel-burning and electrical equipment are used, and therefore have a greater impact on energy savings potential than simply equipment upgrades alone. Significant energy cost savings can be realized when ECMs are combined with efficient-minded operational profiles. Operational profiles may be outlined by organization policy or developed naturally or historically. These profiles include, but are not limited to: operating schedules, equipment setpoints and control strategies, maintenance schedules, and site and equipment selection. Optimization of operational profiles can be accomplished by numerous methods so long as the intent is reduction in energy-using equipment runtime. Due to the numerous methods of optimization, energy cost savings solely as a result of operational optimization are difficult to predict. Quantification, however, is easy to accomplish by metering energy usage during and/or after implementation of energy-saving operational profiles and ECMs. Shown below are some examples which have proven successful for other organizations. Optimization of site selection includes scheduling and location of events. If several buildings in a given neighborhood are all lightly used after regularly occupied hours, energy savings can be found when afterhours events are consolidated and held within the most energy efficient buildings available for use. As a result, unoccupied buildings could be shut down to the greatest extent possible to reduce energy consumption. Two operational behaviors which can be combined with equipment upgrades are operating schedules and equipment control strategies including setpoints. Occupancy and daylight sensors can be programmed to automatically shut off or dim lighting when rooms are unoccupied or sufficiently lit from the sun. Operating schedules can be optimized to run equipment only during regular or high-occupancy periods. Also, through a central control system, or with digital programmable thermostats, temperature setpoints can be reduced during low-occupancy hours to maximize savings. In addition, sporadically used equipment can be shut down during unoccupied hours to further save energy. In general, having equipment operating in areas where no occupants are present is inefficient, and presents an opportunity for energy savings. Operational profiles can also be implemented to take advantage of no- or low-cost ECMs. Examples include heating plant optimizations (boiler section cleaning, boiler flush-through cleaning) and tighter controls of equipment setbacks and shutdowns (unoccupied zones equipment shutdown, easier access to and finer control of equipment for after-hours control). In a large facility management program, implementation of these measures across many or all sites will realize dramatic savings due to the quantity of equipment involved. Changes to building operational profiles can only be realized while simultaneously addressing health, safety, user comfort, and user requirements first. It is impractical to expect users to occupy a building or implement operational behaviors which do not meet such considerations. That said, it is quite practical for management groups to implement administrative controls which reduce losses brought about by excess and sub-optimum usage. Coffman Engineers, Inc. 6/11/

25 Appendix A Energy Benchmark Data Coffman Engineers, Inc. 6/11/2012

26 Draft Facility Owner MOA Building Name/ Identifier Building Usage Building Square Footage ASD Warehouse Warehousing and Wholesale 60,000 Building Type Mixed REAL Preliminary Benchmark Data Form PART I FACILITY INFORMATION Facility Owned By Date Municipal Government/Subdivision 03/14/11 Community Population 261,500 Year Built 1973 Facility Address Facility City Facility Zip 4919 Vanburen St Anchorage Contact Person First Name Last Name Middle Name Phone Steven Golab Golab_Steven@asdk12.org Mailing Address City Anchorage State AK Zip Primary Operating Hours Average # of Occupants During Monday- Friday 08:00-5:00 Saturday Sunday Holidays Renovations Date Details PART II ENERGY SOURCES 1. Please check every energy source you use in the table below. If known, please enter the base rate you pay for the energy source. 2. Provide utilities bills for the most recent two-year period for each energy source you use. Heating Oil Electricity Natural Gas Propane Wood Coal $ /gallon $ / kwh $ / CCF $ / gal $ / cord $ / ton Other energy sources? Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

27 Draft ASD Warehouse Buiding Size Input (sf) = 60, Natural Gas Consumption (Therms) 21, Natural Gas Cost ($) 21, Electric Consumption (kwh) 448, Electric Cost ($) 61, Total Energy Use (kbtu) 3,681, Total Energy Cost ($) 83,060 Annual Energy Use Intensity (EUI) 2009 Natural Gas (kbtu/sf) Electricity (kbtu/sf) Energy Utilization Index (kbtu/sf) 61.4 Annual Energy Cost Index (ECI) 2009 Natural Gas Cost Index ($/sf) Electric Cost Index ($/sf) Energy Cost Index ($/sf) Natural Gas Consumption (Therms) 21, Natural Gas Cost ($) 19, Electric Consumption (kwh) 446, Electric Cost ($) 49, Total Energy Use (kbtu) 3,657, Total Energy Cost ($) 69,185 Annual Energy Use Intensity (EUI) 2010 Natural Gas (kbtu/sf) Electricity (kbtu/sf) Energy Utilization Index (kbtu/sf) 61.0 Annual Energy Cost Index (ECI) 2010 Natural Gas Cost Index ($/sf) Electric Cost Index ($/sf) Energy Cost Index ($/sf) 1.15 Note: 1 kwh = 3,413 Btu's 1 Therm = 100,000 Btu's 1 CF 1,000 Btu's Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

28 Draft Energy Audit Report Anchorage School District Warehouse ASD Warehouse Natural Gas Btus/CCF = 100,000 Provider Meter # Month Start Date End Date Billing Days Consumption (CCF) Consumption (Therms) Demand Use Natural Gas Cost ($) Unit Cost ($/Therm) Demand Cost ($) Enstar NGC Jan-09 01/08/09 02/06/ ,661 3,661 $3,735 $1.02 Enstar NGC Feb-09 02/06/09 03/05/ ,037 3,037 $3,109 $1.02 Enstar NGC Mar-09 03/05/09 04/07/ ,953 2,953 $3,022 $1.02 Enstar NGC Apr-09 04/07/09 05/06/ ,668 1,668 $1,737 $1.04 Enstar NGC May-09 05/06/09 06/08/ $767 $1.09 Enstar NGC Jun-09 06/08/09 07/08/ $536 $1.14 Enstar NGC Jul-09 07/08/09 08/06/ $394 $1.21 Enstar NGC Aug-09 08/06/09 09/08/ $374 $1.20 Enstar NGC Sep-09 09/08/09 10/07/ $800 $1.09 Enstar NGC Oct-09 10/07/09 11/05/ ,476 1,476 $1,549 $1.05 Enstar NGC Nov-09 11/05/09 12/04/ ,126 3,126 $3,202 $1.02 Enstar NGC Dec-09 12/04/09 01/07/ ,040 3,040 $2,655 $0.87 Enstar NGC Jan-10 01/07/10 02/05/ ,454 3,454 $2,924 $0.85 Enstar NGC Feb-10 02/05/10 03/08/ ,285 2,285 $1,949 $0.85 Enstar NGC Mar-10 03/08/10 04/07/ ,453 2,453 $2,112 $0.86 Enstar NGC Apr-10 04/07/10 05/06/ ,663 1,663 $1,458 $0.88 Enstar NGC May-10 05/06/10 06/04/ $734 $0.93 Enstar NGC Jun-10 06/04/10 07/06/ $372 $1.01 Enstar NGC Jul-10 07/06/10 08/06/ $616 $1.59 Enstar NGC Aug-10 08/06/10 09/07/ $697 $1.62 Enstar NGC Sep-10 09/07/10 10/07/ $1,104 $1.18 Enstar NGC Oct-10 10/07/10 11/03/ ,796 1,796 $1,842 $1.03 Enstar NGC Nov-10 11/03/10 12/07/ ,989 2,989 $2,718 $0.91 Enstar NGC Dec-10 12/07/10 01/06/ ,788 3,788 $3,432 $0.91 Jan - 09 to Dec - 09 total: 21,506 21,506 0 $21,880 $0 Jan - 10 to Dec - 10 total: 21,342 21,342 0 $19,958 $0 Jan - 09 to Dec - 09 avg: Jan - 10 to Dec - 10 avg: $1.07 $1.05 Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

29 Final Draft Energy Audit Report ASD Warehouse - Natural Gas Consumption (Therms) vs. Natural Gas Cost ($) 4,000 $4,000 3,500 $3,500 3,000 $3,000 Natural Gas Consumption (Therms) 2,500 2,000 1,500 $2,500 $2,000 $1,500 Natural Gas Cost ($) Natural Gas Consumption (Therms) Natural Gas Cost ($) 1,000 $1, $500 0 Jan-09 Mar-09 May-09 Jul-09 Sep-09 Nov-09 Jan-10 Mar-10 May-10 Jul-10 Sep-10 Nov-10 $0 Date (Mon -Yr) Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

30 Draft Energy Audit Report Anchorage School District Warehouse ASD Warehouse Electricity Btus/kWh =3,413 Provider Customer # Month Start Date End Date Billing Days Consumption (kwh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kwh) Demand Cost ($) Chugach Electric Jan-09 12/26/2008 1/26/ ,192 1, $6,959 $0.15 $1, Chugach Electric Feb-09 1/26/2009 2/28/ ,297 1, $5,541 $0.16 $1, Chugach Electric Mar-09 2/28/2009 3/26/ ,392 1, $7,302 $0.15 $1, Chugach Electric Apr-09 3/26/2009 4/24/ ,563 1, $5,173 $0.15 $1, Chugach Electric May-09 4/24/2009 5/29/ ,590 1, $4,678 $0.15 $1, Chugach Electric Jun-09 5/29/2009 6/24/ ,848 1, $5,031 $0.14 $1, Chugach Electric Jul-09 6/24/2009 7/27/ ,942 1, $3,807 $0.13 $1, Chugach Electric Aug-09 7/27/2009 8/25/ ,017 1, $4,097 $0.13 $1, Chugach Electric Sep-09 8/25/2009 9/24/ ,500 1, $4,277 $0.12 $1, Chugach Electric Oct-09 9/24/ /23/ ,508 1, $4,803 $0.12 $1, Chugach Electric Nov-09 10/23/ /25/ ,457 1, $4,692 $0.12 $1, Chugach Electric Dec-09 11/25/ /23/ ,098 1, $4,820 $0.12 $1, Chugach Electric Jan-10 12/23/2009 1/25/ ,765 1, $4,415 $0.11 $1, Chugach Electric Feb-10 1/25/2010 2/24/ ,571 1, $4,239 $0.11 $1, Chugach Electric Mar-10 2/24/2010 3/25/ ,794 1, $4,610 $0.11 $1, Chugach Electric Apr-10 3/25/2010 4/26/ ,886 1, $4,258 $0.11 $1, Chugach Electric May-10 4/26/2010 5/26/ ,209 1, $3,962 $0.12 $1, Chugach Electric Jun-10 5/26/2010 6/25/ ,781 1, $3,519 $0.12 $1, Chugach Electric Jul-10 6/25/2010 7/27/ , $2,534 $0.14 $1, Chugach Electric Aug-10 7/27/2010 8/26/ ,305 1, $5,053 $0.10 $1, Chugach Electric Sep ,901 1, $3,499 $0.11 Chugach Electric Oct ,424 1, $3,990 $0.11 Chugach Electric Nov-10 10/28/ /29/ ,225 1, $4,238 $0.11 Chugach Electric Dec ,926 1, $4,910 $0.11 Jan - 09 to Dec - 09 total: 448,404 15,304 1,375 $61,180 $14,714 Jan - 10 to Dec - 10 total: 446,263 15,231 1,325 $49,227 $9,856 Jan - 09 to Dec - 09 avg: Jan - 10 to Dec - 10 avg: $0.14 $0.11 Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

31 Final Draft Energy Audit Report ASD Warehouse - Electric Consumption (kwh) vs. Electric Cost ($) 60,000 $8,000 $7,000 50,000 $6,000 40,000 Electric Consumption (kwh) 30,000 20,000 $5,000 $4,000 $3,000 Electric Cost ($) Electric Consumption (kwh) Electric Cost ($) $2,000 10,000 $1,000 0 Jan- 09 Feb- 09 Mar- 09 Apr- 09 May- 09 Jun- 09 Jul-09 Aug- 09 Sep- 09 Oct- 09 Nov- Dec- Jan- Feb Date (Mon -Yr) Mar- 10 Apr- 10 May- 10 Jun- 10 Jul-10 Aug- 10 Sep- 10 Oct- 10 Nov- 10 Dec- 10 $0 Coffman Engineers, Inc. 6/11/2012 Coffman Engineers, Inc.

32 Appendix B AkWarm Commercial Reports Coffman Engineers, Inc. 6/11/2012

33 ENERGY AUDIT REPORT PROJECT SUMMARY Created 11/3/ :33 AM General Project Information PROJECT INFORMATION Building: Anchorage School District Warehouse Address: 4919 Vanburen St City: Anchorage Client Name: Bob Holben AUDITOR INFORMATION Auditor Company: Coffman Engineers Auditor Name: Walter Heins, PE Auditor Address: 800 F Street Anchorage, AK Client Address: Auditor Phone: (907) Auditor FAX: Client Phone: (907) Auditor Comment: Client FAX: Design Data Building Area: 60,000 square feet Typical Occupancy: 40 people Actual City: Anchorage Weather/Fuel City: Anchorage Design Heating Load: Design Loss at Space: 1,433,805 Btu/hour with Distribution Losses: 1,433,805 Btu/hour Plant Input Rating assuming 82.0% Plant Efficiency and 25% Safety Margin: 2,185,679 Btu/hour Note: Additional Capacity should be added for DHW load, if served. Design Indoor Temperature: 61.5 deg F (building average) Design Outdoor Temperature: -18 deg F Heating Degree Days: 10,816 deg F-days Utility Information Electric Utility: Chugach Electric - Commercial - Sm Average Annual Cost/kWh: $0.120/kWh Natural Gas Provider: Enstar Natural Gas - Commercial - Sm Average Annual Cost/ccf: $0.980/ccf Coffman Engineers, Inc. 6/11/2012

34 Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Other Electrical Cooking Clothes Drying Ventilation Fans Service Fees Total Cost Existing Building With Proposed Retrofits $38,867 $0 $563 $23,808 $4,477 $0 $0 $7,015 $0 $74,730 $30,215 $0 $563 $17,098 $4,477 $0 $0 $6,412 $0 $58,766 SAVINGS $8,652 $0 $0 $6,709 $0 $0 $0 $602 $0 $15,963 Coffman Engineers, Inc. 6/11/2012

35 Annual Energy Costs by End Use $80,000 $60,000 Ventilation and Fans Space Heating Other Electrical Lighting Domestic Hot Water $40,000 $20,000 $0 Existing Retrofit Coffman Engineers, Inc. 6/11/2012

36 Appendix C Major Equipment List Coffman Engineers, Inc. 6/11/2012

37 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY B-1 Boiler Rm B-2 Boiler Rm WH-1 WH-2 FAF-1 FAF-2 FAF-3 FAF-4 GUH-1 Mezzanine Science Kit Area Above Kitchen and Restrooms Above Conference Room in Mezzanine Southern Mezzanine Science Kit Area Warehouse/ Loading Dock Permanent Backup Boiler Permanent Primary Boiler Domestic Hot Water Domestic Hot Water Ventilation and Space Heat Ventilation and Space Heat Ventilation and Space Heat Ventilation and Space Heat Space Heat Weil McLain 988 AERCO BMK 2.0 State A.O. Smith Lennox Lennox Lennox Modine Reznor GS650YR RT5 Dura- Power No Nameplate GS180E- 50 GS1804/5 E DJE75AB 11 No Nameplate Dual Fuel, Gas-Oil, Cast Iron Boiler Condensing Gas Boiler with 20:1 Turndown Gas Fired, Standard Updraft Electric Gas Fired, Forced Air Furnace Gas Fired, Forced Air Furnace Gas Fired, Forced Air Furnace Gas Fired, Forced Air Furnace Gas Fired Unit Heater 2,713 MBH Input 2,000 MBH Input 65 MBH Input 50 gal 9 kw 50 gal 75 MBH Estimated 50 MBH 140 MBH 80% AFUE Estimated 92% AFUE Estimated 70% AFUE Estimated MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) 2 HP % Electric N/A % AFUE Estimated 65% AFUE Estimated 65% AFUE Estimated 2 HP Estimated 1 HP Estimated 2 HP Estimated MBH % AFUE Estimated ½ HP Estimated NOTES Appears to be 1980 Vintage 25 0 Built Built Unit is currently shut down and not used. Off in summer. 55F Set point in winter. Coffman Engineers, Inc. 6/11/2012

38 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY AHU-3 Boiler Rm Warehouse Trane EF-1 EF-3 EF-5 Restro om Exhaus t d Chargi ng Station Fan e SF-1 Loading Dock Boiler Rm Southeast Ware-house Above kitchen and bathrooms Battery Charging Station Boiler Rm Loading Dock Exhaust Boiler Room Ventilation Ventilation Bathroom Exhaust Exhausts fumes from charging station Boiler Room Ventilation Dayton Motor MCC Size 12 Greenheck Greenheck No Nameplate CWB CSP- A110 Hydronic Heating Coil. Centrifugal fan with variable speed drive. Axial Fan Centrifugal Fan 5,000 CFM 2.0 5,000 CFM CFM 0.25 Motor: 89.5% Eff PF - Axial Fan Centrifugal Fan - Axial Fan - 65% Estimated No Nameplate Greenheck CSP- A110 Centrifugal Fan MOTOR SIZE 5 HP 3 PH ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) % Estimated 2 HP % Estimated 51 W ½ HP Estimated 20 Age unknown - 65% Estimated ¾ HP CFM HP Estimated % Estimated 51 W NOTES A.O. Smith Century E- Plus 3 Motor Unit is kept in off position. Appears to be 1980 vintage. Appears to be 1980 vintage. d Exhaust fan name not found during site visit. e Exhaust fan name and nameplate not found during site visit. Fan is on timer and is operated 6-8 hrs per day to vent fumes while forklift batteries charge. Coffman Engineers, Inc. 6/11/2012

39 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY CF-1 Boiler B-1 UH-1 P-1A Warehouse Boiler Rm Combustion air for Boiler B-1 Space Heat (19 Total) Main Circ Pump Tjernlu nd PAI-6 Trane 252-P Baldor Motor Super-E Centrifugal Fan Hydronic Radiator with Axial Fan Base- Mounted MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) - 75% Estimated 1/3 HP MBH 4,162 CFM 215 GPM 70 75% Estimated 1/4 HP % Eff. 79% PF 7.5 HP 3 PH NOTES Inter-locked with Boiler B-1. P-1B Boiler Rm Main Circ Pump Baldor Motor Super-E Base- Mounted 215 GPM % Eff. 79% PF 7.5 HP 3 PH P 2 Boiler Rm Boiler B 1 Circ Baldor Motor Super E Inline 180 GPM % Eff. 82% PF 2 HP 3 PH 10 6 P 3 Boiler Rm Boiler B 2 Circ Baldor Motor Super E Inline 180 GPM % Eff. 82% PF 2 HP 10 6 P 31 Above Boiler Rm HX 31 to AHU 3 Circ Emerso n P63CKA 2740 Inline 40 GPM 30 75% Estimated ¾ HP 3 PH 10 6 Coffman Engineers, Inc. 6/11/2012

40 Appendix D Energy Conservation Measures Coffman Engineers, Inc. 6/11/2012

41 PRIORITY LIST RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings 1 Lighting: Exterior Lighting Replace with 9 LED 115W Module Installed Cost SIR Payback (Years) $743 $3, Air Tightening Perform air sealing to reduce air leakage by 30%. $3,221 $10, Lighting: Exterior Lighting 4 Lighting: Lightly Used Office Spaces 5 Lighting: Restrooms 6 Lighting: Restrooms 7 Lighting: Corridor 8 Lighting: Office Spaces 9 Lighting: Restrooms 10 Lighting: Large Office Spaces Replace with 3 LED 72W Module Replace with 10 FLUOR (4) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor Replace with FLUOR (4) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor Replace with 2 FLUOR (4) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor Replace with 4 FLUOR (4) T8 4' F32T8 32W Standard Program Replace with 52 FLUOR (4) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor Replace with 28 FLUOR (4) T8 4' F32T8 32W Standard Program $152 $ $290 $1, $24 $ $70 $ $91 $ $1,311 $9, $38 $ $485 $4, Coffman Engineers, Inc. 6/11/2012

42 PRIORITY LIST RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings 11 Ventilation Install new high efficiency restroom fan motor that is controlled based on restroom occupancy and timer. Upgrade battery charging station fan to new high efficiency unit. Installed Cost SIR Payback (Years) $572 $4, Lighting: Warehouse 13 Lighting: Restrooms 14 HVAC And DHW 15 Lighting: Corridor 16 Lighting: Warehouse 17 Garage Door: South Overhead Door - Hollow Wood 18 Garage Door: West Overhead Doors - Hollow Wood 19 Lighting: Warehouse Replace with 2 LED 4W Module Replace with 3 FLUOR (2) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor Add control valves to 19 Unit Heaters and add VFDs to P-1A and P-1B Replace with 7 FLUOR (2) T8 4' F32T8 32W Standard Program Replace with 36 FLUOR (4) T5 45.2" F28T5 28W Standard Replace existing garage door with R-7, 2" polyurethane core replacement door. Replace existing garage door with R-7, 2" polyurethane core replacement door. Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Program $39 $ $57 $ $2,148 $20, $91 $ $932 $9, $63 $ $127 $1, $26 $ Coffman Engineers, Inc. 6/11/2012

43 PRIORITY LIST RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings 20 Lighting: Bay Area Work Station Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Program Installed Cost SIR Payback (Years) $21 $ Lighting: Bay Area Work Station 22 Above-Grade Wall: Exterior Walls - Metal Building with 3.5" FB Over the Purlin 23 Lighting: Room Exterior Door: West and North Entry Doors 25 Lighting: 2nd Floor Warehouse 26 Lighting: Bay Area Work Station 27 Lighting: Restrooms 28 Lighting: Lightly Used Warehouse Replace with 9 FLUOR (2) T8 4' F32T8 32W Standard Program Install R-13 fiberglass batts in empty 2x4 cavity. Replace with 6 FLUOR (4) T8 4' F32T8 32W Standard Program Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. Replace with 28 FLUOR (2) T8 4' F32T8 32W Standard Program Replace with FLUOR CFL, Spiral 20 W Replace with FLUOR (2) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor Replace with 8 FLUOR (2) T8 4' F32T8 32W Standard Program $96 $1, $3,055 $65, $54 $ $85 $2, $183 $3, $6 $ $12 $ $34 $1, Coffman Engineers, Inc. 6/11/2012

44 PRIORITY LIST RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings 29 Lighting: Lightly Used Office Spaces Replace with FLUOR (2) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor and Improve Manual Switching Installed Cost SIR Payback (Years) $19 $ Lighting: Bay Area Work Station 31 Exterior Door: South Entry Door - Half Lite 32 Window/Skylight : West Windows 33 Lighting: Utility/Storage 34 Window/Skylight : South Windows 35 Lighting: Warehouse 36 Cathedral Ceiling: Hot Roof 37 On- or Below- Grade Floor, Perimeter: Floor - Perimeter 38 Lighting: Utility/Storage Replace with 2 FLUOR T8 4' F32T8 32W Standard Program Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. Replace existing window with U-0.30 vinyl window Replace with 2 FLUOR CFL, Spiral 20 W Replace existing window with U-0.30 vinyl window Replace with 81 FLUOR (6) T5 45.2" F54W/T5 HO Standard Install R-5 rigid board insulation. No cost included for covering insulation. Install 2' of R-5 rigid board insulation around perimeter of Slab (vertical or horizontal). Replace with FLUOR (4) T8 4' F32T8 32W Standard Program $7 $ $6 $ $299 $14, $2 $ $70 $3, $702 $40, $778 $90, $48 $6, $1 $ Coffman Engineers, Inc. 6/11/2012

45 PRIORITY LIST RECOMMENDED ENERGY EFFICIENCY MEASURES Rank Feature Recommendation Annual Energy Savings 39 Lighting: Utility/Storage Replace with FLUOR (2) T8 4' F32T8 32W Standard Program Installed Cost SIR Payback (Years) $1 $ Exterior Door: South Entry Door 41 Lighting: 2nd Floor Storage/Mechani cal 42 Lighting: Utility/Storage Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. Replace with 4 FLUOR (2) T8 4' F32T8 32W Standard Program Replace with FLUOR (4) T8 4' F32T8 32W Standard Program $1 $ $2 $ $0 $ TOTAL $15,963 $302, Note: ECM #3, 7, and 12 in the Executive Summary at the beginning of the report were modeled with separate AkWarm models, due to the modeling limitations of improvement items in AkWarm. As a result, ECM #3, 7, and 12 from the Executive Summary are not additive measures in AkWarm and therefore is not included in Appendix D. Coffman Engineers, Inc. 6/11/2012

46 ENERGY AUDIT REPORT ENERGY EFFICIENT RECOMMENDATIONS 1. Building Envelope Insulation Rank Location Existing Type/R-Value Recommendation Type/R-Value Installed Cost Annual Energy Savings 22 Above- Grade Wall: Exterior Walls - Metal Building with 3.5" FB Over the Purlin Wall Type: Single Stud Siding Configuration: Just Siding Insul. Sheathing: None Structural Wall: 2 x 4, 24 inches on center Fiberglass/Loose fill, 2.2 inches Install R-13 fiberglass batts in empty 2x4 cavity. $65,430 $3,055 Window and door headers: Not Insulated Modeled R-Value: 8 36 Cathedral Ceiling: Hot Roof Framing Type: I-Beam (TJI) Framing Spacing: 24 inches Insulated Sheathing: Fiberglass/Loose fill, 0.65 inches Install R-5 rigid board insulation. No cost included for covering insulation. $90,872 $778 Bottom Insulation Layer: None Top Insulation Layer: Polyisocyanurate (PISO), 5 inches Modeled R-Value: On- or Below-Grade Floor, Perimeter: Floor - Perimeter Insulation for 0' to 2' Perimeter: EPS (Beadboard), 1 inches Insulation for 2' to 4' Perimeter: None Modeled R-Value: 8.2 Install 2' of R-5 rigid board insulation around perimeter of Slab (vertical or horizontal). $6,652 $48 Coffman Engineers, Inc. 6/11/2012

47 Exterior Doors Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 17 Garage Door: South Overhead Door - Hollow Wood Door Type: Uninsulated Wood Door Insulating Blanket: None Replace existing garage door with R-7, 2" polyurethane core replacement door. $936 $63 Modeled R-Value: Garage Door: West Overhead Doors - Hollow Wood Door Type: Uninsulated Wood Door Insulating Blanket: None Replace existing garage door with R-7, 2" polyurethane core replacement door. $1,872 $127 Modeled R-Value: Exterior Door: West and North Entry Doors Door Type: Metal 1-3/4", paper honeycomb core Modeled R-Value: 1.8 Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $2,050 $85 31 Exterior Door: South Entry Door - Half Lite Door Type: Metal/PU half lite Modeled R-Value: 3.3 Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $410 $6 40 Exterior Door: South Entry Door Door Type: Metal - urethane, therm. break Modeled R-Value: 5.3 Remove existing door and install standard pre-hung U-0.16 insulated door, including hardware. $410 $1 Coffman Engineers, Inc. 6/11/2012

48 Windows and Glass Doors Replacement Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings 32 Window/Skylight: West Windows Glass: Double, glass Frame: Aluminum, No Thermal Break Replace existing window with U-0.30 vinyl window $14,778 $299 Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.81 Solar Heat Gain Coefficient: Window/Skylight: South Windows Glass: Double, glass Frame: Aluminum, No Thermal Break Replace existing window with U-0.30 vinyl window $3,633 $70 Spacing Between Layers: Half Inch Gas Fill Type: Air Modeled U-Value: 0.81 Solar Heat Gain Coefficient: 0.46 Air Leakage Rank Location Estimated Air Leakage Recommended Air Leakage Target Installed Cost Annual Energy Savings 2 Air Tightness estimated as: 0.70 cfm/ft2 of above-grade shell area at 75 Pascals Perform air sealing to reduce air leakage by 30%. $10,000 $3,221 Coffman Engineers, Inc. 6/11/2012

49 2. Mechanical Equipment Mechanical Rank Recommendation Installed Cost Annual Energy Savings 14 Add control valves to 19 Unit Heaters and add VFDs to P-1A and P-1B $20,000 $2,148 Setback Thermostat Rank Location Size/Type/Condition Recommendation Installed Cost Annual Energy Savings Ventilation Rank Recommendation Cost Annual Energy Savings 11 Install new high efficiency restroom fan motor that is controlled based on restroom occupancy and timer. Upgrade battery charging station fan to new high efficiency unit. $4,000 $ Appliances and Lighting Lighting Fixtures and Controls Rank Location Existing Recommended Installed Cost Annual Energy Savings 1 Exterior Lighting 9 HPS 250 Watt Magnetic with On/Off Photoswitch 3 Exterior Lighting 3 HPS 150 Watt Magnetic with On/Off Photoswitch Replace with 9 LED 115W Module Replace with 3 LED 72W Module $3,600 $743 $900 $152 4 Lightly Used Office Spaces 10 FLUOR (4) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 10 FLUOR (4) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor $1,800 $290 Coffman Engineers, Inc. 6/11/2012

50 5 Restrooms FLUOR (4) T12 4' F40T12 40W Standard with Manual Switching 6 Restrooms 2 FLUOR (4) T12 4' F40T12 40W Standard Magnetic with Manual Switching 7 Corridor 4 FLUOR (4) T12 4' F40T12 40W Standard Magnetic with Manual Switching 8 Office Spaces 52 FLUOR (4) T12 4' F40T12 40W Standard Magnetic with Manual Switching 9 Restrooms 2 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with FLUOR (4) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor Replace with 2 FLUOR (4) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor Replace with 4 FLUOR (4) T8 4' F32T8 32W Standard Program Replace with 52 FLUOR (4) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor $151 $24 $450 $70 $600 $91 $9,600 $1,311 $301 $38 10 Large Office Spaces 28 FLUOR (4) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 28 FLUOR (4) T8 4' F32T8 32W Standard Program $4,200 $ Warehouse 2 INCAN A Lamp, Std 25W with Manual Switching 13 Restrooms 3 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 2 LED 4W Module Replace with 3 FLUOR (2) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor $350 $39 $525 $57 Coffman Engineers, Inc. 6/11/2012

51 15 Corridor 7 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching 16 Warehouse 36 FLUOR (2) T12 8' F96T12/HO 110W Standard Magnetic with Manual Switching 19 Warehouse 2 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 7 FLUOR (2) T8 4' F32T8 32W Standard Program Replace with 36 FLUOR (4) T5 45.2" F28T5 28W Standard Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Program $875 $91 $9,000 $932 $300 $26 20 Bay Area Work Station 2 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 2 FLUOR (2) T8 4' F32T8 32W Standard Program $250 $21 21 Bay Area Work Station 9 FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 9 FLUOR (2) T8 4' F32T8 32W Standard Program $1,350 $96 23 Room FLUOR (4) T12 4' F40T12 40W Standard with Manual Switching Replace with 6 FLUOR (4) T8 4' F32T8 32W Standard Program $900 $ nd Floor Warehouse 28 FLUOR (2) T12 8' F96T12 75W Standard Magnetic with Manual Switching Replace with 28 FLUOR (2) T8 4' F32T8 32W Standard Program $3,500 $ Bay Area Work Station INCAN A Lamp, Std 60W with Manual Switching Replace with FLUOR CFL, Spiral 20 W $50 $6 27 Restrooms FLUOR (2) T12 4' F40T12 40W Standard with Manual Switching Replace with FLUOR (2) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor $275 $12 Coffman Engineers, Inc. 6/11/2012

52 28 Lightly Used Warehouse 8 FLUOR (2) T12 8' F96T12 75W Standard Magnetic with Manual Switching Replace with 8 FLUOR (2) T8 4' F32T8 32W Standard Program $1,000 $34 29 Lightly Used Office Spaces FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with FLUOR (2) T8 4' F32T8 32W Standard Program and Add new Occupancy Sensor and Improve Manual Switching $625 $19 30 Bay Area Work Station 2 FLUOR T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 2 FLUOR T8 4' F32T8 32W Standard Program $300 $7 33 Utility/Storage 2 INCAN A Lamp, Halogen 75W with Manual Switching 35 Warehouse 81 MH 350 Watt Magnetic with Manual Switching 38 Utility/Storage FLUOR (4) T12 4' F40T12 40W Standard Magnetic with Manual Switching 39 Utility/Storage FLUOR (2) T12 4' F40T12 40W Standard Magnetic with Manual Switching Replace with 2 FLUOR CFL, Spiral 20 W Replace with 81 FLUOR (6) T5 45.2" F54W/T5 HO Standard Replace with FLUOR (4) T8 4' F32T8 32W Standard Program Replace with FLUOR (2) T8 4' F32T8 32W Standard Program $100 $2 $40,000 $702 $150 $1 $125 $1 41 2nd Floor Storage/Mechanica l 4 FLUOR (2) T12 8' F96T12 75W Standard Magnetic with Manual Switching Replace with 4 FLUOR (2) T8 4' F32T8 32W Standard Program $500 $2 42 Utility/Storage FLUOR (4) T12 4' F40T12 40W Standard with Manual Switching Replace with FLUOR (4) T8 4' F32T8 32W Standard Program $150 $0 Coffman Engineers, Inc. 6/11/2012

53 Refrigeration Rank Location Existing Recommended Installed Cost Annual Energy Savings Other Electrical Equipment Rank Location Existing Recommended Installed Cost Annual Energy Savings Cooking/Clothes Drying Rank Recommended Installed Cost Annual Energy Savings Coffman Engineers, Inc. 6/11/2012

54 Appendix E Site Visit Photos Coffman Engineers, Inc. 6/11/2012

55 1. West face of building 2. South face of building 3. East face of building 4. North face of building 5. Loading bay doors 6. Unused overhead door on east face of building. Coffman Engineers, Inc. 6/11/2012

56 7. Manually operated circular roof vents (4 total along roof ridge) 8. Interior view of manually operated circular roof vent 9. Boiler B-1 (Weil McLain) and B-2 (AERCO) located in boiler room 10. Forced air furnace FAF-1 located above kitchen and restrooms Coffman Engineers, Inc. 6/11/2012

57 11. Forced air furnace FAF-2 located above conference rooms in mezzanine 12. Forced air furnace FAF-3 located on southern mezzanine 13. Forced air furnace FAF-4 located in the Science Kit area 14. The exhaust duct of the restroom exhaust fan has become partially disconnected Coffman Engineers, Inc. 6/11/2012

58 15. Natural gas-fired hot water heater WH-1 located adjacent to FAF Electric hot water heater WH-2 located in Science Kit area 17. Exhaust fan for battery charging station 18. Warehousing space inside the building Coffman Engineers, Inc. 6/11/2012

59 19. Loading bays and exhaust fan EF-1 Coffman Engineers, Inc. 6/11/2012

60 Appendix F Thermographic Photos Coffman Engineers, Inc. 6/11/2012

61 Coffman Engineers made miscellaneous thermographic images of ASD Warehouse building using a FLIR T300 Infrared Camera. This is not a thermographic study, rather photographs to illustrate easy-to-identify heat losses. 20. Optical Image, SW Corner. Thermal Image below is indicated by the white border. Questionable insulation at roof/wall connection Heat loss at windows is expected. Questionable insulation below window framing. No insulation at concrete stem wall all around building. 21. Thermographic Image, SW Corner. Temperatures indicated by color scale on right. Yellow indicates heat leakage. The outside temperature was about +40 F. Coffman Engineers, Inc. 6/11/2012

62 22. Optical Image, Front Door. Thermal Image below is indicated by the white border. 23. Optical Image, East Side. Thermal Image below is indicated by the white border. Thermographic image, Front Door. Rows of bolts penetrate insulation all around building 24. Thermal Image, vacated door on east side. 25. Optical Image, North Side. Thermal Image below is indicated by the white border. 26. Unit Heater, Thermal Image below is indicated by the white border. Coffman Engineers, Inc. 6/11/2012

63 27. Thermal Image, North Side. Yellow indicates heat leakage. Unit Heater is hot at all times, is not controlled with a valve. Area above heater is warmed by heat leakage. Coffman Engineers, Inc. 6/11/2012