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Passive House Intro For Professionals


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This is brief introduction to the Passive House method which I gave to an audience of energy efficiency design professionals.

Published in: Technology, Business

Passive House Intro For Professionals

  1. 1. the passivhaus energy design standard a rigorous, voluntary building energy standard focusing on a high performance envelope with a resulting minimized mechanical system
  2. 2. the passivhaus standard <ul><li>Heating Energy Use < 15 kWh/m 2 yr (4,750 BTU/ft 2 yr) </li></ul><ul><li>Peak Heat Load < 10 W/m 2 (3.2 BTU/hr.ft 2 ) </li></ul><ul><li>Airtightness: n 50 < 0.6 ACH (a typical residence is 5) </li></ul><ul><li>Total Primary Energy Use < 120 kWh/m 2 yr (38,000 BTU/ft 2 yr) </li></ul>Concept Origin: “Tunneling through the cost barrier” –Amory Lovins
  3. 3. the passivhaus concept <ul><li>First Minimize Losses… </li></ul><ul><ul><li>Superinsulated & Airtight Envelope without thermal bridges </li></ul></ul><ul><ul><li>Heat Recovery Ventilation, >80% efficiency </li></ul></ul><ul><li>Then Maximize Gain… </li></ul><ul><ul><li>Passive Solar Gain (often optional) </li></ul></ul><ul><ul><li>Thermal mass (commensurate with solar gain) </li></ul></ul>
  4. 4. the passivhaus concept
  5. 5. the energy modeling design tool <ul><li>The “Passive House Planning Package” (PHPP) </li></ul><ul><ul><li>An Excel-based steady-state energy design program </li></ul></ul><ul><ul><li>Extremely detailed </li></ul></ul><ul><ul><li>Calculations are transparent and customizable </li></ul></ul>
  6. 6. superinsulation without thermal bridges Windows: Triple-pane with insulated frames Inset within wall profile
  7. 7. superinsulation without thermal bridges Miscellaneous Details…
  8. 8. simplified mechanical system The “magic box”
  9. 9. passivhaus development… CEPHEUS Project of 1999-2000
  10. 10. passivhaus development…
  11. 11. passivhaus development…
  12. 12. passivhaus arrives in the US…
  13. 13. “ passive house” development in the US 12” Trusjoist TJI’s as wall studs
  14. 14. the passive house & affordable housing
  15. 15. the passive house & custom housing Taos, New Mexico Passive Conservation (Envelope Investment) Active Generation (Solar Collector Investment) Where is the optimum point on this spectrum?
  16. 16. passive house news… October 19, 2007… Winner of the Solar Decathalon: Technische Universität Darmstadt
  17. 17. passive house news… Presentations by: Harold Orr, Canadian Research Council Bill Rose, Building Research Council, Univ. of Illinois John Broniek, IBACOS Marc Rosenbaum, Energy Smiths Manfred Brausem, Architect