Last month, I began the travels for my Churchill Fellowship by making a pilgrimage to Darmstadt in Germany, the birthplace of the Passivhaus standard. I gathered with fellow ‘Passivhausers’ from around the world for the 20th International Passivhaus Conference and to celebrate the impressive milestone of 25 years of Passivhaus. Technology, techniques, awareness and enthusiasm for the standard have evolved dramatically since the prototype house was constructed, but the reliable physics underlying the system remains largely unchanged.
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