Passivhaus

Passivhaus is a building standard that was developed in Germany in the early 1990s. Buildings meeting this standard are carefully designed and insulated so as to dramatically reduce requirements for conventional sources of warmth. The 40,000 of these buildings that exist around the world, are mostly in German-speaking countries and Scandinavia. However, numbers are have increased in the UK from just one in Wales in 2008 to more than 100 in 2012. In the UK the Passivhaus Trust promotes the standard.