Overall energy use (Primary energy renewable must not exceed 60kwh/ m 2/yr.Airtightness must be 0.6ACH50 or lower and be verified on site.Humidity must not exceed 12g/kg for more than 20% of the year (~60%RH at 25☌).Cooling demand 15kWh/ m 2/yr (in humid climates this allowance increases to allow for dehumidification) or cooling load 10W/ m 2 (if installed).Heating demand 15kWh/ m 2/yr or heating load 10W/ m 2.Thermal comfort must be achieved during winter (20☌ minimum) as well as in summer (this can be adjusted in extreme climates), with not more than 10% of the hours in a given year over 25☌.To obtain certification, a building must meet the following criteria: The PHI administers a certification scheme that allows a building to be called a Certified Passive House. The Passive House standard defines globally consistent performance metrics for buildings. Photo: PassiveHouse BB The passive house standard and certification The first Passive House, Darmstadt Germany 1992 A certified Passive House undergoes a quality assurance process that ensures that it is built as designed and meets the comfort standards required by the Passive House standard. … a building, for which thermal comfort (ISO 7730) can be achieved solely by post-heating or post-cooling of the fresh air mass, which is required to achieve sufficient indoor air quality conditions, without the need for additional recirculation of air.Īs air is a poor carrier of heat energy, the heating and cooling energy requirements of the building must be very low because there is not sufficient air flow to deliver large amounts of heating or cooling energy.Ī Passive House is appropriately insulated, airtight, has quality windows and reliable ventilation systems with heat recovery. The definition of a Certified Passive House is: The focus of the design is ensuring the thermal envelope (the layer that separates inside from outside) is optimised to provide comfortable, healthy, indoor conditions. ‘Passive House’, or passivhaus as it is known in German, is a design standard that delivers healthy, comfortable and efficient buildings.Ī Passive House takes a ‘fabric first’ approach.
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