PassivHaus construction

An interesting article from The Ecologist about PassivHaus Construction

How does it work?
Imagine wrapping a whole house in a tea cosy. Instead of just insulating the walls and lofts, the insulating layer is continuous. The emphasis is on super-insulation and stringent levels of airtightness to create a ‘tea-cosy effect’ (or minimal thermal bridging). The houses are also designed to optimise heat from the sun (passive solar gain). The only techie bit is the mechanical ventilation and heat-recovery system (MVHR), which provides the house with fresh air and helps to warm it by recovering heat from the extracted air and transferring it to the incoming air. In addition, most of the of heat generated inside – body heat from people and animals, heat from lighting and cooking, as well as solar gain – is retained within the building. As a result you hardly need any traditional heating or air conditioning systems.

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