Gallery: US Passive House Conference Showcases Loads Of Green Building ...

 
The high tech and high performance device in every passive house is a heat or energy recovery ventilator. Passive House not only takes into account the efficiency of the heat exchanger as the home is constantly flushed with fresh air but also the electricity required to do so. The US company UltimateAir has a high efficiency ERV and fully programmable unit which hit the sweet spot of performance and cost using a rotary core heat exchanger. A step up in efficiency is Zehndar which also sells engineered air distribution systems that maximize performance. Air Pohoda, the most efficient unit at the conference, made its debut from Czechoslovakia. While enormous compared to the others, it has nearly half the energy consumption, a big deal for a device that runs 24/7. Brooklyn-based material supplier 475, named after the famous energy threshold for passive house, was touting their micro Luno ERV. A 5-inch round tube that contains a super efficient reversible fan and ceramic core that captures the heat in the outgoing stale air also reverses to heat the incoming fresh air.

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