Criteria of passive houses :
If one of the following criteria is not met, the building will not be eligible for Passivhaus certification!
- Heating/cooling requirements ⩽ 15 kWh/m².year or maximum heating/cooling load ⩽ 10 W/m²
In a traditional house, heating needs are around 60-150 kWh/m²a (4 to 10 times more than in a passive house). The maximum load for heating in a traditional house is about 30-50 W/m² (3 to 5 times more than in a passive construction).
In a traditional construction, if we add up all the small air leaks that were left during construction, it is as if there was a 40×40 cm hole in the wall. In a passive building, it is as if there were a hole the size of a €1 coin.
- Primary energy requirements ⩽ 120 kWh/m².year or primary renewable energy needs ⩽ 60 kWh/m².year
- Overheating limitation (less than 10% of the days of the year must have temperature peaks above 25 degrees)