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--- certification:passive_house_categories:classic-plus-premium [2024/04/18 22:01] – [PER methodology in a nutshell] jgrovesmith
+++ certification:passive_house_categories:classic-plus-premium [2024/04/18 22:02] – [Introduction] jgrovesmith
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 ===== Introduction =====
-Anyone who has built or lives in a Passive House building already has this part of the energy transition taken care of. After all, the low energy demand in a Passive House can sustainably come from regional energy sources. The supply structure is transitioning from fossil sources to renewables at an encouragingly rapid pace. The conventional primary energy assessment systems for energy demand in buildings are based on old supply systems and do not work in the new one with an increasing share of renewables. The Passive House Institute therefore developed a new evaluation system based on renewable primary energy ([[basics:energy_and_ecology:primary_energy_renewable_per|PER, Primary Energy Renewable]]). Based on the achieved level of energy efficiency and the amount of renewable energy supply, Passive House certification is available in three classes:
+Anyone who has built or lives in a Passive House building already has this part of the energy transition taken care of. After all, the low energy demand in a Passive House can sustainably come from regional energy sources. The supply structure is transitioning from fossil sources to renewables at an encouragingly rapid pace. The conventional primary energy assessment systems for energy demand in buildings are based on old supply systems and do not work in the new one with an increasing share of renewables. The Passive House Institute therefore developed a unique evaluation system based on renewable primary energy ([[basics:energy_and_ecology:primary_energy_renewable_per|PER, Primary Energy Renewable]]). Based on the achieved level of energy efficiency and the amount of renewable energy supply, Passive House certification is available in three classes:
   * The **Passive House Classic**, which is the traditional Passive House