How energy efficient is a Passive House?

Passive Houses are designed to be incredibly energy efficient, up to 90% more efficient than a typical Australian home (cooling + heating). With a high level of insulation and an airtight building envelope, the key to the design is to minimise heat loss/gain and control annual solar heat gain. By designing building envelopes that incorporate “thermal bridge free design”, energy loss is significantly reduced around windows, exterior doors, mechanical openings, corners of the building and junction points in between the roof and the walls. Using high quality windows (minimum triple glazed) and insulated exterior doors are an absolute must in a Passive House.