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PASSIVE building An introduction Certified Passive House, GO Home, Belfast, ME.

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Presentation on theme: "PASSIVE building An introduction Certified Passive House, GO Home, Belfast, ME."— Presentation transcript:

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3 PASSIVE building An introduction Certified Passive House, GO Home, Belfast, ME

4 buildings CHINA -18,100,000,000 SF PER YEAR June report from the American Council for an Energy-Efficient Economy (ACEEE)June report from the American Council for an Energy-Efficient Economy (ACEEE),

5 75% electricity 50% carbon

6 World Energy Use U.S. share of world energy consumption: 26% U.S. share of world CO2 emissions: 24% U.S. share of world population: 4.6% Ratio - per capita consumption of energy in developed vs. developing countries: 10 times Sources: The Energy Information Administration; The United Nations Energy Committee US people US energy/ CO2

7 www.globalchange.gov

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9 © 2009Robby Schwarz www.nrglogic.com Lance Wright www.greenenergyman.com Global Climate Change 1928 2004 Source: Time magazine April, 2006

10 A rigorous, voluntary building energy standard focusing on a high performance envelope with a resulting minimized mechanical system. Passive

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12 The magic numbers of Passive House The Passive House Standard: Why these numbers?

13 Cost Effectiveness Trick

14 Passive 10x (roughly more efficient than what we build today)

15 The Passive House Standard: CATEGORY: Space Specific Heating or Cooling Demand per year: Total Primary Energy Use per year: Airtightness: PASSIVE HOUSE: (4.75 kBTU/ft 2 yr) < 1.39 kWh/ft 2 yr (up to 90% better) (38 kBTU/ft 2 yr) < 11.13 kWh/ft 2 yr (up to 70% better) n 50 < 0.6 ACH (up to 90% better) AVERAGE U.S. NEW CONSTRUCTION (2007): 36.6 kBTU/ft 2 yr (56.64 kBTU/ft 2 yr) n 50 = 3ACH to 5 ACH 1- 2- 3-

16 A BTU is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.poundwater Fahrenheit (about 5,000 BTU/hour to heat a 1500 square foot passive house on the coldest day of the year, vs a typical house is 100,000 BTU furnace

17 Watt this means: Heat your 1500 sf house with 1500w or the energy of (15) 100w light bulbs on the coldest hour of the year The Passive House Standard:

18 1500 watts $14.99 + tax Passive house heating system:

19 (no Photovoltaic.i.e. solar electric panels, roughly here (solar hot water potentially) (WITH Photovoltaic.i.e. solar electric panels, can be negative HERS score or PLUS ENERGY

20 The Leger House looked like a conventional American home, heated only by its own water heater! Eugene LEGER HOUSE 1979

21 1. Truly superb insulation. Not just thick, but clever and thorough. Excellent insulation is provided even at the most difficult places: sills, headers, foundation walls, windows, electric outlet boxes, etc. 2. Envelope of house is practically airtight. Even on the windiest days the rate of air change is very low. 3. No provision of extra-large thermal mass. (Down with Trombe walls! Down with water-filled drums and thick concrete floors!) 4. No provision of extra-large south windows. Use normal number and size of south windows say 100 square feet. 5. No conventional furnace. Merely steal a little heat, when and if needed, from the domestic hot water system. Or use a minuscule amount of electrical heating. William Shurcliff, 1979 Press Release:

22 6. No conventional distribution system for such auxiliary heat. Inject the heat at one spot and let it diffuse throughout the house. 7. No weird shape of house, no weird architecture. 8. No big added expense. The costs of the extra insulation and extra care in construction are largely offset by the savings realized from not having huge areas of expensive Thermopane [windows], not having huge well-sealed insulating shutters for huge south windows, and not having a furnace or a big heat distribution system. 9. The passive solar heating is very modest almost incidental. 10. Room humidity remains near 50 percent all winter. No need for humidifiers. 11. In summer the house stays cool automatically. There is no tendency for the south side to become too hot because the south window area is small and the windows are shaded by eaves.

23 Larger developments followed in Canada in 1980 with 14 superinsulated homes, and then with 140 superinsulated homes in Minnesota in the US. 1982-83 Canada sponsors the R2000 program with free training for builders and small subsidies to offset cost and requirement for an airtightness test: a blower-door test. Over 1000 homes were built. Conservative estimate of total superinsulated homes 1985 in the US and Canada is 10,000.

24 It doesnt have to cost more…….

25 $100k Community Rebuilds – passive project in the works? Moab, Utah

26 $100k Community Rebuilds – passive project in the works? Moab, Utah

27 $250k Empowerhouse Solar Decathlon - Habitat for Humanity Passive project Deanwood neighborhood of D.C.

28 $250k Empowerhouse Solar Decathlon - Habitat for Humanity Passive project Deanwood neighborhood of D.C.

29 $250k Empowerhouse Solar Decathlon - Habitat for Humanity Passive project Deanwood neighborhood of D.C.

30 $350k 2100 square foot near passive house project Winner 2012 CRES award

31 Total energy $ per year: Heating: Slab: Walls: Roof: Windows: Ventilation: Hot water: Electric: $300 100% Electric R-40 R-70 R-5 (.56 SHGC) 96% heat recovery Single 4x8 panel Solar thermal 3.3kW pv system(4600kWh / yr)

32 ALPINE PASSIVE HOUSE Boulder, Colorado TEAM: FUENTESDESIGN LOPEZ SMOLENS ASSOCIATES CONSULTING ENGINEERS LIGHTLY TREADING SLM CONSTRUCTION ARTESANO PLASTER ZOLA EUROPEAN WINDOWS ULTIMATE AIR LIGHTLY TREADING $400k 2500 square foot straw bale passive house project

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34 PREFAB + STRAW BALE ALTITUDE: 7,105 HEATING DEGREE DAYS: 7,051 SSHD: 4.58 kBTU/(FT2YR) PENDING CERTIFICATION FIRE REBUILD 6kW PV LOW EMBODIED ENERGY STRAW BALE WALL SYSTEM THERMAL MASS STORAGE ELECTRIC IN-FLOOR RADIANT HEAT PUMP HOT WATER HEATER 90% LED LIGHTING

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38 VENTILATION – 90% +/- RECOVERY OF HEAT

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40 SOLAR PATHFINDER… SHADING... FINDING AIR LEAKS….

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42 STATUS: PASSED AIR TEST, CLIENT TO REMOVE BURNED TREES TO CERTIFY SHADING

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44 lighting

45 Incandescent 20 l/w T5 FLUORESCENT Stanley elec.white LED CREE lab record LED 20 l/w 100 l/w 150 l/w 276 l /w

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47 refrigeration

48 Subzero Pro 48 Energy Star limit Sunfrost RF16 691 kWh/yr 481 kWh/yr 240 kWh/yr

49 windows R-3.3 SHGC R-5.48 SHGC ENERGY STAR ALPEN 725H

50 THERM RESULTS in straw bale wall: (R-6.31 FRAME).5 SHGC /.088 U / R-11.36 ψ INSTALL= -.006 (Btu/hr.ft2.F) R-8.48 SHGC

51 Window Interior Surface Temperature (+2 degrees F outside)

52 Wall Interior Surface Temperature (+2 degrees F outside)

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