Passive House Intro For Professionals
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Transcript of Passive House Intro For Professionals
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the passivhaus energy design standard
a rigorous, voluntary building energy standard focusing on a high performance envelope with a resulting minimized mechanical system
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the passivhaus standard
•Heating Energy Use < 15 kWh/m2yr (4,750 BTU/ft2yr)•Peak Heat Load < 10 W/m2 (3.2 BTU/hr.ft2)•Airtightness: n50 < 0.6 ACH (a typical residence is 5)•Total Primary Energy Use < 120 kWh/m2yr (38,000 BTU/ft2yr)
Concept Origin: “Tunneling through the cost barrier” –Amory Lovins
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the passivhaus concept
First Minimize Losses…•Superinsulated & Airtight Envelope without thermal bridges•Heat Recovery Ventilation, >80% efficiency
Then Maximize Gain…•Passive Solar Gain (often optional)•Thermal mass (commensurate with solar gain)
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the passivhaus concept
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the energy modeling design tool
The “Passive House Planning Package” (PHPP) •An Excel-based steady-state energy design program•Extremely detailed•Calculations are transparent and customizable
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superinsulation without thermal bridges
Windows:Triple-pane with insulated framesInset within wall profile
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superinsulation without thermal bridges
Miscellaneous Details…
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simplified mechanical system
The “magic box”
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passivhaus development…
CEPHEUS Project of 1999-2000
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passivhaus development…
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passivhaus development…
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passivhaus arrives in the US…
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“passive house” development in the US
12” Trusjoist TJI’s as wall studs
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the passive house & affordable housing
www.e-colab.org
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the passive house & custom housing
Passive Conservation(Envelope Investment)
Active Generation(Solar Collector Investment)
Where is the optimum point on this spectrum?
Taos, New Mexico
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passive house news…
October 19, 2007… Winner of the Solar Decathalon:Technische Universität Darmstadt
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passive house news…
Presentations by:Harold Orr, Canadian Research CouncilBill Rose, Building Research Council, Univ. of IllinoisJohn Broniek, IBACOSMarc Rosenbaum, Energy SmithsManfred Brausem, Architect