Low-Impact Remodeling

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1 Low-Impact Remodeling Mike O Brien, OSD Green Building Specialist Building envelope Solar heating & cooling Space heating Water heating Ventilation Moisture control Combustion safety Performance testing

2 Insulation is: Building Envelope Continuous no thermal breaks Full-R not compressed Higher R--not code minimum Air barriers tested to meet air leakage standards Windows Select by: U, SHGC, VT Doors Insulated core

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4 Insulation Options Fiberglass batts Recycled denim batts Spray-in foam --Low density --High density Spray-in cellulose Spray-in fiberglass Integrated systems (SIPs, ICFs)

5 R-values Envelope assembly Attic ceiling Cathedral ceiling Walls Floors Basement walls 1992 Oregon Energy Code R-38 R-30 R-21 R-30 R-11 Optimum R-42/49 R-33/38 R-25 R-30 R-19

6 Spray-in foam Fiberglass batts

7 Which side is insulated with batts? Spray-in foam? Portland Office of Sustainable Development

8 Foam + batts Portland Office of Sustainable Development

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10 Wet-spray cellulose Recycled denim fiber

11 Wet-spray cellulose Portland Office of Sustainable Development

12 Spray-in fiberglass

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14 Integrated Structures SIPs Rastra Durisol and Faswall ICFs Other panel systems Durisol Portland Office of Sustainable Development Rastra

15 Structural Insulated Panels

16 CONTINUITY: Insulating hard-to-reach spots

17 Windows U-value = 1 / R-value Oregon Energy Code: U = 0.40 or lower (R-2.5) Optimum: U = 0.33 or lower (R-3)

18 Replacement sash Portland Office of Sustainable Development

19 U-value = Rate of heat transfer SHGC = Solar Heat Gain Coefficient Reflect incoming solar heat VT = Visible Transmittance

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24 Air barriers Blower door test Envelope tightness Cost-effective air sealing Combustion safety Duct blaster Carbon monoxide test

25 Blower door Portland Office of Sustainable Development

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27 Finding and sealing air leaks Smoke pencil

28 Duct blaster

29 Continuous air barrier ADA Airtight Drywall Approach Portland Office of Sustainable Development

30 Space heating options Forced air systems Replace furnace Look for AFUE of 90% + Variable-speed blower motor Seal ductwork Insulate ductwork Programmable thermostat

31 High-efficiency sealed-combustion furnaces Efficient blower motor Tight ducts

32 Home Comfort Zones forced-air zoning system Portland Office of Sustainable Development

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34 Space heating options Hydronic systems High-efficiency boiler PEX plumbing Radiant heating Radiators Fan-forced wall units

35 Green Remodeling Radiant hydronic heating Radiant hydronic heating

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40 Water heaters Standard efficiency gas: 55% Good efficiency gas: 60% High efficiency gas: 80% + Sealed combustion--safe! Tankless gas: 80% + Electric: 93% Heat pump: 200% +

41 Tankless Water Heaters

42 Water Heater --120F --Wrap hot and cold lines --Wrap tank --Set tank on insulation --Showerheads 1.5 GPM --Faucet aerators 1.5 GPM

43 Solar water heating and photovoltaic systems Portland Office of Sustainable Development

44 Solar Water Heating

45 Fresh air ventilation Meets ASHRAE Standard 62.2 Whole house and spot ventilation Durable equipment Intelligent controls

46 Exhaust fans Quiet < 1 sone Durable CFM Timer control

47 Timer controls

48 Make-up air for exhaust ventilation

49 Fresh air inlet Located in closet on outside wall

50 Remote exhaust fan

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52 Solar tubes

53 Before and after daylighting

54 Contact G/Rated Mike O Brien ci.portland.or.us www. portlandonline. com/osd ReThink class series March 1 Download Green Remodeling Guide

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56 Oregon Energy Trust 139,171 Compact fluorescent bulbs 20,744 15,526 4, incentive payments Home improvement projects Clothes washers Home energy audits Energy Star new homes Solar water heaters Solar electric systems

57 Residential Tax Credits Furnaces Heat pumps Appliances Clackamas 1,360 Multnomah 2,953 Washington 1,783 Clackamas 87 Multnomah 73 Washington 149 Clackamas 8,855 Multnomah 12,291 Washington 12,050