Anderson Sargent Builders. Barley Pfieffer Architects. Building Science Corporation
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1 Anderson Sargent Builders Barley Pfieffer Architects Building Science Corporation The Energy Efficient Building Assoc. US DOE Building America Program Present The Anderson/Sargent Dallas Show House: A Case Study CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 1 of 71
2 CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 2 of 71
3 Energy Performance Benchmark Home Predicted Energy Use: 329 MMBtu/yr Appliances + Plug 27% Space Heating 20% Lighting 13% DHW 8% Space Cooling 32% Zero Energy Home Predicted Energy Use: 122 MMBtu/yr Appliances + Plug 44% Lighting 11% * Space Heating 14% Space Cooling 15% DHW 16% * Actual use may vary with consumer behavior CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 3 of 71
4 Predicted Energy Use vs. Predicted Energy Collection Anderson-Sargent Zero Energy Home Predicted Consumption versus Predicted Solar Collection Consumption (Usage) Generation (Solar) Hot Water Space Heating Space Cooling Lighting Appliance / PV CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 4 of 71
5 Predicted Energy Use vs. Predicted Energy Collection Anderson-Sargent Zero Energy Home Predicted Load Breakdown 122 MMBtu/yr Utility Generation or 10,800 kwh/yr Site Generation Space Heating 14% Appliances + Plug 44% Space Cooling 15% Lighting 11% DHW 16% Table 2. Summary of End-Use Source-Energy and Savings Source Energy Savings Estimated Annual Source Energy Percent of End-Use Percent of Total BA Benchmark Prototype 1 Prototype 1 savings Prototype 1 savings End-Use 10 6 BTU/yr 10 6 BTU/yr Space Heating % 15% Space Cooling % 27% DHW % 2% Lighting % 8% Appliances + Plug % 11% OA Ventilation** 0 0 0% 0% Total Usage % 63% Site Generation % -12 4% Net Energy Use % 100% Notes: Energy Star Score = 94.5 CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 5 of 71
6 The Anderson Sargent home is expected to produce as much energy as it consumes. But many logical strategies to improve performance were applied to this system prior to providing site generated power Energy Efficient Systems Thermally efficient enclosure Air leakage control Duct Sealing Water Efficient Systems Indoor Outdoor Healthy Interior Environments Comfort Air change /Diluting the source Source control / Capturing the source Information to Homeowners Homeowner education Homeowners operation and maintenance manual Reduced Global Impact Increased Durability/ Moisture Control Reduction of carbon dioxide Passive designs Environmentally Sensitive Site Planning and land use Low impact development Preserve & protect natural environment CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 6 of 71
7 Homeowner benefits include Lower operating costs Increased comfort Improved environmental quality Enhanced durability & less maintenance CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 7 of 71
8 Specifically, the house uses the following strategies to reduce impact and improve performance 1. Site Development Lot Design, Preparation and Development Building on an existing developed lot Oak tree on lot was preserved Soil erosion and disturbance minimized during construction Manage storm water w/low impact, low water use landscapexeriscape CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 8 of 71
9 2. Resource Efficiency Durisol Block Enhance durability & reduce maint. Durisol block uses recycled content materials Reuse materials - stair treads from old beam 45% fly ash additive to concrete used Fibercement siding on furring strips over housewrap for longer life Complete window and door flashing packages Non-paper faced gypsum board- less moisture sensitive Stone facing at grade level for additional durability Floors stained concrete finish CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 9 of 71
10 3. Energy Efficiency Exceeds 2003 IEEC 94.5 Energy Star Score Verify performance with 3rd party Thermally efficient enclosure Passive cooling strategies Air sealing High efficiency HVAC design & equipment Solar Thermal Design Solar Electric Design All Energy Star Appliances 90% Compact Fluorescent Lights CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 10 of 71
11 4. Indoor/Outdoor Water Use Water conservation system This home will use 30% less water for indoor needs and supply nearly all of its own water for outdoor use. Xeriscaping & Drip Irrigation: The landscaping consists of an impressive variety of native and low water use vegetation. Sod is drought tolerant Zoysia. All planting areas, other than sod, are drip irrigated Rain water harvesting designs with cisterns, enough water collected (up to 5000 gallons) that no water expected to be needed from city to water yard High Performance Hot Water Distribution System optimizing the layout (shortest route) right-sizing the pipe, selecting the right type of pipe, and a recirculation loop run by an efficient pump. The wait time in the North Texas ZEH is about 5 seconds for 120 F water and all the cooled water is sent back to the water heater tank. CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 11 of 71
12 4. Indoor/Outdoor Water Use (continued) Delta low-flow faucets and showerheads, delivering the same wetting characteristics as conventional fixtures, but using 35% less water Metlund Hot Water D Mand system, recirculating cooled water in your hot water pipes back to your water heater; saving water, energy, and adding the convenience of instant hot water Toto water closets, toilets that actually work, requiring a single flush of 1.6 gallons or less (Toto is the only manufacturer to have all of their products pass the new stringent MaP Test Whirlpool clotheswasher, using up to 42 percent less energy and up to 59 percent less water compared to standard-efficiency clotheswashers Whirlpool dishwasher, using at least 25% less energy and 44% less water than conventional dishwashers The ETWater Systems controller, reducing outdoor water use by up to 50% while maintaining health and vigor of turf and plants. This system uses the internet as its vehicle for communications CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 12 of 71
13 5. Indoor Environmental Quality Source control with closed combustion gas appliances fireplace instantaneous hot water heater Dilution ventilation in accordance with ASHRAE 62-2, provided by outside air mixed and distributed through the air handling system Exhaust ventilation at pollution source Bathrooms kitchen Designed for natural flow through of outside air Window glazing selected for true color rendition Finishes chosen for low VOC s Surfaces chosen for ease of cleaning with low toxic products High efficiency filtration at return Mold and mildew prevention Interior relative humidity control Control of liquid water entry Non-moisture sensitive construction materials CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 13 of 71
14 5. Indoor Environmental Quality (cont.) Comfort Features Building Enclosure designed to be leak free to stop unintentional air leakage Interior environmental controls allow for maximum flexibility of interior environment Continuous airflow provides clean smell Day-lighting provides connection to outside Screened and shaded porches for variety Shaded backyard kitchen allows for heat to remain outside High mass interior and exterior walls help keep temperature constant Sound attenuated by block and foam gaskets between floors and at laudry room wall CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 14 of 71
15 Systems Engineering Systems-Engineering means coordinated, comprehensive high performance. We know this and expect this of our cars the engine, the transmission, the brakes, the chassis are all matched in design and operation, to work as a system. It means the same for and we should expect the same of our homes. The building shell, the windows, the HVAC, the hot water, the electrical are designed and constructed recognizing the impacts these systems have on each other and, ultimately, on home performance. The result is a quality home, a house that works safe, comfortable, healthy, efficient, easy to own and operate. CS-BA21: The Anderson/Sargent Dallas Show House A Case Study 15 of 71
16 Building Enclosure All six sides of any building (the four walls, the roof and the foundation) must be designed to manage the flow of liquid water, water vapor, air, and heat (including the transitions from roof to wall and wall to foundation). Key aspects of this home include: Roof assembly Spray foam insulation (R-30) that manages moisture, air and heat in the roof assembly, particularly at the eave transition to the top of the walls. Roof cladding The metal roof has a high performance coating, giving it relatively high solar reflectance (28%) and emmissivity (85%). Hence the name Ultra-Cool for this roofing material. Exterior walls This is a moisture-forgiving assembly throughout from the furred out fibercement siding to the wood-cement composite block (Durisol- R-14) to the non-paper faced gypsum board interior. High performance windows The spectral properties of window glazing can be tuned in terms of rejecting and retaining different forms of heat. The windows in this home are tuned for the Dallas climate (low-e, U = 0.38, SHGC = 0.29); the glazing is even different on the south side of the house (SHGC = 0.48) to maximize winter sun gain. Foundation A continuous capillary break separates the grade beams and slab foundation from the ground and soil moisture; rigid foam insulation (R-5) under the secondary cast concrete slab keeps radiant floor heat in. CS-0021: The Anderson/Sargent Dallas Show House A Case Study 16 of 71
17 Building Enclosure Characteristics Passive Design Passive Design uses the building to even out highs and lows of heating and cooling, and to promote natural ventilation and day-lighting. Note the following passive features of this home: Eave overhangs and window awnings Both are sized to reject high-angle summer sun, receive low-angle winter sun, and let in plenty of diffuse light year round. Windows and their placement The windows in this home have been sized and placed for maximum cross ventilation as well as for thermo-siphoning (Operable windows at the stair landing on the leeward side of the home encourage hot air exhaust up high and cool air intake down low). The centrally-located stair tower and north-sky facing skylight bring natural daylight into the core of the house, much like in vernacular Texas architecture, reducing reliance on electric lighting and enhancing the interior ambiance. Thermal mass the block walls and first floor concrete slab have lots of mass interior to the insulation. The walls and floor act as a heat sink, storing heat for later release, smoothing out daily high and low temperatures during both heating and cooling. Garage Placement On north side of house, blank walls protect house from northern winds Substantially detached from house to avoid carbon monoxide and other product contamination to house Garage vented with screens on two sides CS-0021: The Anderson/Sargent Dallas Show House A Case Study 17 of 71
18 What does a building enclosure need to do? 1. Control heat flow, airflow, and water vapor flow 2. Control rain and ground water 3. Control light and solar radiation 4. Control noise and vibrations 5. Control contaminants, environmental hazards and odors, insects, rodents and vermin 6. Control fire 7. Provide strength and rigidity 8. Be durable 9. Be aesthetically pleasing These assemblies do it all. CS-0021: The Anderson/Sargent Dallas Show House A Case Study 18 of 71
19 CS-0021: The Anderson/Sargent Dallas Show House A Case Study 19 of 71
20 CS-0021: The Anderson/Sargent Dallas Show House A Case Study 20 of 71
21 CS-0021: The Anderson/Sargent Dallas Show House A Case Study 21 of 71
22 Subsoil Depressurization System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 22 of 71
23 Overhangs designed to allow for passive gain in the wintertime and to assist with shading in the summertime CS-0021: The Anderson/Sargent Dallas Show House A Case Study 23 of 71
24 First Floor N CS-0021: The Anderson/Sargent Dallas Show House A Case Study 24 of 71
25 Second Floor CS-0021: The Anderson/Sargent Dallas Show House A Case Study 25 of 71
26 Building Mechanical Characteristics Heat Radiant slab hydronic system w/solar and gas heating Gas fired tankless water heater backup Optional high HSPF (9.3) Heat Pump Cooling/dehumidification Multi Stage, Multi Zone Chilled water system built from 1.5 T & 2.0 T High SEER (13+) Heat Pumps 3 zones of variable speed air handlers DHW Solar and gas tankless heater indirect water heater Rinnai tankless water heater (0.82EF) backup CS-0021: The Anderson/Sargent Dallas Show House A Case Study 26 of 71
27 Building Mechanical Characteristics (cont.) Solar Thermal 64 s.f. Two panel hot water system 105 gallon tank Solar Electric 8.12 W peak Photovoltaic system Grid tied inverter Ducts In conditioned space No leakage to the outside Appliances - EnergyStar Lighting - 90% compact fluorescent CS-0021: The Anderson/Sargent Dallas Show House A Case Study 27 of 71
28 Building Mechanical Characteristics (cont.) Mechanical Ventilation A high performance building enclosures is tight enough to require purposeful and measured introduction of outside air for a high performance indoor environment. This home has a fresh air duct linked to the central forced-air system that not only introduces outside air, it distributes it throughout the entire home. A damper and cycling controller ensure that not too much outside air is pulled in during extended periods of forced-air operation and enough outside air is introduced during extended periods when the house is not calling for space heating or cooling. 68CFM average flow CS-0021: The Anderson/Sargent Dallas Show House A Case Study 28 of 71
29 CS-0021: The Anderson/Sargent Dallas Show House A Case Study 29 of 71
30 Mechanical Systems Heating, Cooling, DHW CS-0021: The Anderson/Sargent Dallas Show House A Case Study 30 of 71
31 Ducts Inside the Conditioned Space CS-0021: The Anderson/Sargent Dallas Show House A Case Study 31 of 71
32 Ducts Inside the Conditioned Space CS-0021: The Anderson/Sargent Dallas Show House A Case Study 32 of 71
33 Ventilation Scheme Continuous supply air enters at a low rate (68 CFM) Return air mixed with incoming air and brought through a filter Brought in through a high efficiency filter Point source exhaust at baths and kitchen Operate on demand at time of pollution generation CS-0021: The Anderson/Sargent Dallas Show House A Case Study 33 of 71
34 Heating System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 34 of 71
35 Heating System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 35 of 71
36 Heating System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 36 of 71
37 Cooling System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 37 of 71
38 Cooling System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 38 of 71
39 Cooling System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 39 of 71
40 DHW System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 40 of 71
41 DHW System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 41 of 71
42 DHW System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 42 of 71
43 Solar Electric System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 43 of 71
44 Solar Electric System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 44 of 71
45 Solar Electric System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 45 of 71
46 Solar Thermal System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 46 of 71
47 Solar Thermal System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 47 of 71
48 Solar Thermal System CS-0021: The Anderson/Sargent Dallas Show House A Case Study 48 of 71
49 Installing window in Durisol wall with stone veneer Step 1 Durisol block wall CS-0021: The Anderson/Sargent Dallas Show House A Case Study 49 of 71
50 Installing window in Durisol wall with stone veneer Step 2 Install sill with backdam CS-0021: The Anderson/Sargent Dallas Show House A Case Study 50 of 71
51 Installing window in Durisol wall with stone veneer Step 5 Apply sealant over wood bucks CS-0021: The Anderson/Sargent Dallas Show House A Case Study 51 of 71
52 Installing window in Durisol wall with stone veneer Step 6 Liquid applied elastic membrane over sill, bucks and face of block CS-0021: The Anderson/Sargent Dallas Show House A Case Study 52 of 71
53 Installing window in Durisol wall with stone veneer Step 7 Apply sealant at head and jambs CS-0021: The Anderson/Sargent Dallas Show House A Case Study 53 of 71
54 Installing window in Durisol wall with stone veneer Step 8 Install sill blocking CS-0021: The Anderson/Sargent Dallas Show House A Case Study 54 of 71
55 Installing window in Durisol wall with stone veneer Step 9 Install window CS-0021: The Anderson/Sargent Dallas Show House A Case Study 55 of 71
56 Installing window in Durisol wall with stone veneer Step 10 Apply liquid applied waterproofing to bottom three feet of wall CS-0021: The Anderson/Sargent Dallas Show House A Case Study 56 of 71
57 Installing window in Durisol wall with stone veneer Step 11 Apply polymer-modified stucco rendering as stone veneer bed CS-0021: The Anderson/Sargent Dallas Show House A Case Study 57 of 71
58 Installing window in Durisol wall with stone veneer Step 12 Install stone veneer CS-0021: The Anderson/Sargent Dallas Show House A Case Study 58 of 71
59 Installing window in Durisol wall with fibercement siding Step 1 Durisol block wall CS-0021: The Anderson/Sargent Dallas Show House A Case Study 59 of 71
60 Installing window in Durisol wall with fibercement siding Step 2 Install wood bucks at sill, head and jambs; ensure 3/4 overhang (which will align with face of furring) CS-0021: The Anderson/Sargent Dallas Show House A Case Study 60 of 71
61 Installing window in Durisol wall with fibercement siding Step 3 Install wood cant strip at head CS-0021: The Anderson/Sargent Dallas Show House A Case Study 61 of 71
62 Installing window in Durisol wall with fibercement siding Step 4 Install wood buck at sill CS-0021: The Anderson/Sargent Dallas Show House A Case Study 62 of 71
63 Installing window in Durisol wall with fibercement siding Step 5 Apply sealant around wood buck at jambs and sill CS-0021: The Anderson/Sargent Dallas Show House A Case Study 63 of 71
64 Installing window in Durisol wall with fibercement siding Step 6 Liquid applied elastic membrane installed over bucks, cant strip, sill, face of sill dam and face of block CS-0021: The Anderson/Sargent Dallas Show House A Case Study 64 of 71
65 Installing window in Durisol wall with fibercement siding Step 7 Apply sealant at head and jambs CS-0021: The Anderson/Sargent Dallas Show House A Case Study 65 of 71
66 Installing window in Durisol wall with fibercement siding Step 8 Position window for installation CS-0021: The Anderson/Sargent Dallas Show House A Case Study 66 of 71
67 Installing window in Durisol wall with fibercement siding Step 9 Install window CS-0021: The Anderson/Sargent Dallas Show House A Case Study 67 of 71
68 Installing window in Durisol wall with fibercement siding Step 10 Apply tape at jambs CS-0021: The Anderson/Sargent Dallas Show House A Case Study 68 of 71
69 Installing window in Durisol wall with fibercement siding Step 11 Apply tape at head CS-0021: The Anderson/Sargent Dallas Show House A Case Study 69 of 71
70 Installing window in Durisol wall with fibercement siding Step 12 Install furring strips CS-0021: The Anderson/Sargent Dallas Show House A Case Study 70 of 71
71 Installing window in Durisol wall with fibercement siding Step 13 Install fibercement siding over furring strips CS-0021: The Anderson/Sargent Dallas Show House A Case Study 71 of 71
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