The most important principle for energy efficient construction is: A continuous insulating envelope all around the building (yellow) minimises heat losses like a warm coat. In addition to the insulating envelope there should also be an airtight layer (red line) as most insulation materials are not airtight. Preventing thermal bridges (circles) is essential – indeed it is so important that a separate planning method has been developed: thermal bridge free design.
|The Passive House envelope|
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