This document introduces the Thousand Home Challenge, which aims to reduce energy consumption in existing homes by 70-90% through performance-based design. It reviews two options for qualifying homes in the challenge - reducing energy use by 75% or meeting a customized energy threshold. The document also provides a case study of a 1940 home in Petaluma, CA that was rehabilitated in phases to incorporate various energy efficiency and renewable energy strategies, with the goal of achieving net zero energy use.

1. Thousand Home ChallengeIntro to Indicators of Performance George Beeler, AIMA S S O C I A T E S Petaluma, CA george@aimgreen.com For more information: Linda Wigington, ACI 724-852-3085lwigington@affordablecomfort.org www.affordablecomfort.org 9/12/2010

2. Purpose of this Power Point: Introduce the Thousand Home Challenge (THC) Review the criteria for meeting the Thousand Home Challenge Show case study: Beeler live/work, rehabilitation of 1940 energy hog, Petaluma, CA

4. Develop indicators of home energy performance

5. Exemplify the performance-based systems design approach

6. Assemble local / regional centers of excellence

8. Optimize Investment Customized based on goals, opportunity, resources, & needs Multiple paths to get to deep reductions!

9. Not Included in THC but Very Important Embodied Energy – food, energy, consumables, waste, building materials Transportation Energy

10. Key MetricTransparent & DirectInclude Occupants Net Annual Household Site Energy (wood included, solar is not)

11. Two Options for QualifyingMeet or exceed a household energy allowance OPTION A Relative, 75% reduction Annual measured use – pre and post Best for higher use households OPTION B Absolute, not relative: customized by household Inputs – climate, house size, #of occupants, heat source Best – Low Use households or those without pre-use

12. Option BProportional to the Opportunity Responsive but not linear House Size – thermal loads are not strictly linear Occupancy – More people use more energy, but not linear Climate – In mild climates heating & cooling loads should be eliminated

13. OPTION B: Customized Household Threshold Estimates energy needed for a very high performance house for Heating Cooling Hot Water Everything Else Sum is the actual site energy household threshold that must be met or exceeded in order to meet the Thousand Home Challenge

16. Ellen & George Beeler Live/Work Building Rehabilitation 1940 Vintage - Petaluma, CA CASE STUDY Updated 9-9-10 13 AIMA S S O C I A T E S

17. At Left is Typical Neighborhood Bungalow At Right is 1940’S Building Before 2005 Renovation Southwest view EXISTING 14 AIMA S S O C I A T E S

18. BEELER FAMILY PORTRAIT by Emily Vincent 5/2010 George holding Rudy and Ellen holding Iggy 15 AIMA S S O C I A T E S

19. Location is critical to a green lifestyle Rehabilitate existing building Or use infill site To reduce driving, be close to: Work Schools Friends Groceries, etc. Able to walk & bike Utilize existing infrastructure Avoid destruction of habitats Avoid destruction of farm land FUTURE LIGHT RAIL DOWN TOWN BEELER RESIDENCE LOCATION • ELLEN & GEORGE BEELER LIVE/WORK REMODEL 16 AIM A S S O C I A T E S

20. AIM FOR ZERO NET ENERGY & AVOIDING OF FOSSIL FUELS IN PHASES 17 2010 rehabilitation phase energy efficiency strategies: • Increased attic insulation from R-30 to R-50 & air infiltration improvements • Den made into cocoon space • Solar air heating & solar space heating added to cocoon • Solar water heating 2005 rehabilitation phase energy efficiency strategies: • Passive ventilation & night cooling with turbine ventilator • Solar air heating of ground floor • Photovoltaic system AIMA S S O C I A T E S

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23. R-30 blown-in cellulose attic insulation

24. Dense-pack cellulose wall insulation: R-13 @ 2x4 studs, R-20 @ 2x6 studs

25. Replaced single glazed aluminum windows with fiberglass Low-E2 argon

26. Replaced existing 40% efficient furnace with 96% efficient furnace with two-level burner and high-efficiency variable speed fan with duct air pressure auto adjustment so that we may use dampers

27. Manual, central duct dampers for zone control of heating each room

28. Removed conventional water heater & added demand type water heater

29. Energy Star appliances (top 10% of Energy Star)

30. Almost all lights are fluorescent or CFL

31. Solar clothes dryer = clothes drying lines

32. Carefully open & close shades/windows for solar gain or passive cooling19 AIMA S S O C I A T E S

33. SECOND PHASE - 2005 REMODEL 20 AIMA S S O C I A T E S

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36. ALTERNATIVE ENERGY SYSTEMS Turbine ventilator uses wind to draw air out of living areas for passive ventilation and night cooling • 24” throat diameter. • It draws 2,000 cfm during 5 mph breeze • A neoprene gasketed duct damper prevents air leakage common with whole house fans Solar air heating is provided by 200 sq. ft. of Solar Wall brand transpiring panels 2,500 watt photovoltaic array provides all live/work building electricity plus electric bicycle & future electric car 23 AIMA S S O C I A T E S

37. DUCTS UNDER TURBINE VENTILATOR 14” DIAMETER DUCT TO DRW WARM AIR FROM UNDER PHOTOVOLTAIC PANELS 24” DIAMETER DUCT TO GASKETED DAMPER AT CEILING OF STAIR WELL FOR WHOLE HOUSE VENTILATION 24 AIMA S S O C I A T E S

38. SOUTHEAST ELEVATION AFTER 2005 RENEWABLE ENERGY REMODEL 25 AIMA S S O C I A T E S

39. Three-layer honeycomb (R-4) interior shade It is difficult to keep cold air from flowing out from around the edges Cable trellis was modified, so vines shade office glass door but do not shade living room window All existing windows were replaced with high-performance windows, except this living room window because it was too expensive (unusual shape). That is why the R-4 shade is needed 26 AIMA S S O C I A T E S

40. DIRECT GAIN SOLAR HEATING WHEN THE SHADE IS RAISED. THIS ALSO PROVIDES A DELIGHTFUL PLACE TO KNIT! 27 AIMA S S O C I A T E S

41. 28 AFTER BLOWER DOOR TEST 2010 blower door test was done after 3rd phase remodel Air sealing when walls opened & more attic insulation was installed Brennan Less & Jeremy Fisher operate a blower door to test the combined air leakage of the ground & main floors They are graduate architecture students at UC Berkeley and interns at LBNL Prior to 2010: 0.45 ACH 50 Pasc There will be monitoring of all energy use & viewable online The results have not been reported as of 9/12/2010 AIMA S S O C I A T E S

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43. Presentation by George Beeler, Principal Architect AI MA S S O C I A T E S ARCHITECTURE & INTEGRATED DESIGN TEAM MANAGEMENT 100 Fair Street AIM© September 2010 Petaluma, CA 94952-2515 www.aimgreen.com 707-763-3300 x2 george@aimgreen.com 30 AIMA S S O C I A T E S