Passive House or Passivhaus
Passive House is a construction concept and design standard for a rigorously detailed building envelope. Passive Houses require minimal energy to heat and cool. Indoor air temperature is maintained at a minimum of 20°C, achieved with 90% less energy than an average building. With current concerns over fuel poverty and climate change, Passive House construction is increasing in popularity, with some leading examples of individual dwelling houses across the UK and also recently, multi-apartment residential units in Central London.
The PassivHaus Institute regulates a quality assurance process and certification system that ensures the demanding energy efficiency standards are met.
To achieve the passivhaus standard, the principles of Passive House must be integrated into the design from the outset. These include consideration to:
Building form and fenestration - A compact building with fenestration facing south is optimal.
Airtightness - Excellent airtightness designed-in fully sealed around all services and structure penetrations.
Insulation - Thick and continuous insulation with thermal bridge free design.
Structural stability without compromising thermal performance.
Ventilation - comfort ventilation with heat recovery essential.
Site proof construction design.
