Passive Houses incorporate five key design and construction elements, which work together to deliver superior thermal performance. These are:
Insulation: The walls, floor, and ceiling are wrapped in a continuous ‘blanket’ of insulation. This minimises heat gain in summer and heat loss in winter.
High Quality Glazing: To reduce heat transfer, windows are fitted with double glazing or low-emissivity glass.
Eliminate Thermal Bridges:
Areas of the building shell that conduct heat or cold more quickly than the rest of the structure (such as where metal framing connects interior and exterior wall linings) can compromise your insulation performance. A passive house will be built to eliminate these thermal bridges.
Air Tightness: Passive Houses are built to be airtight: there are no draughts or air leakage. This helps maintain that constant indoor temperature.
Heat Recovery Ventilation: The airflow in and out of a passive house is controlled with a heat recovery ventilation (HRV) system, which removes the stale air and replaces it with a constant supply of fresh, temperature-controlled, filtered air.