Commercially available heat pump based HRV
Great Idea, but the Europeans are way ahead of us on HRVs.
Nilan, a Danish company makes a commerically available residential HRV that uses both passive heat exchange and active heat exchange. You might get some ideas from there. Search for "Nilanuk combi 300" on Google to get the english spec for the device. I can't post links since this is my first post.
The Nilan box may not be certified for North American use but I think this company has imported some. The company is called airxsolution.com in Quebec
The company also offers minotaur, an active heat exchanger based HRV.
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