The Passivhaus PH standard is a set of voluntary criteria for an ultra-low energy use home. Consequently there are four mechanical whole-house ventilation systems to choose from.
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Note that continuous whole-house ventilation systems were developed in the 1980s to meet the IAQ.
. Originally developed in Germany for houses and low-rise multi-unit residential buildings the standard has been applied to houses in a range of other countries and to commercial buildings as well. Exhaust supply balanced and energy recovery.
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