A passive house
A passive house is a building consuming so small power volumes on heating that a separate heating system becomes unnecessary there in the building.
The maximum admissible annual thermal energy specific consumption on a building heating, concerning a living space, should constitute15 kWh/ (м² per year).
A passive house requirements:
- A high level of a heat insulation alongside of all .contours of a building (a heat transfer coefficient is at the level no more than 0.15 W/m²K).
- Heat-insulated window frames with a threefold heat-saving glass cover and filling of interglass space with a noble gas with a heat transfer coefficient of window UW < 0.8 W/(м²K).
- Building envelopes without thermal bridges.
- An air-proof building envelope.
- КComfortable controllable (influx-and-extract) ventilation with highly efficient heat recuperation and moisture return, a heat recuperation level > 75%.
- The Southern direction of the Basic Facade (a maximum deviation ±30°) and the big window openings looking onto the South.
- A compactness of a form of the building (as far as possible without prominent structures)*.
*Wolfgang Feist. «The Basic Provisions on the Passive Houses Designing».