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Passive House

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The Passive House concept represents today's highest energy standard with the promise of slashing the heating energy consumption of buildings by an amazing 90%. Widespread application of the Passive House design would have a dramatic impact on energy conservation. Data from the U.S. Energy Information Administration shows that buildings are responsible for 48% of greenhouse gas emissions annually and 76% of all electricity generated by U.S. power plants goes to supply the Building Sector

Performance Characteristics

  1. Airtight building shell ≤ 0.6 ACH @ 50 pascal pressure, measured by blower-door test.
  2. Annual heat requirement ≤ 15 kWh/m2/year (4.75 kBtu/sf/yr)
  3. Primary Energy ≤ 120 kWh/m2/year (38.1 kBtu/sf/yr). 
  4. In addition, the following are recommendations, varying with climate:
  • Window u-value ≤ 0.8 W/m2/K  
  • Ventilation system with heat recovery with ≥ 75% efficiency with low electric consumption @  0.45 Wh/m3
  • Thermal Bridge Free Construction ≤ 0.01 W/mK
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Graphic courtesy of NY Times
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