Hoi Tinco,
Just a short reply for now, I'll go in more detail later.
Quote:
Originally Posted by tinco
Before I start building my exchanger I want to run some numbers by you folks.
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I haven't read much here about fan power efficiency, it seems like it's really important since they're basically always on in a balance ventilation system and they can differ as much as 25-66W.
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The fan you picked can do 180 m^3/h indeed, if it has to overcome no presuredifference at all. With a difference of 60Pa (Which is not even much after the heatexchanger and a dustfilter only 50m^3/h remains, while using 30W per fan (times 2 fans equals about 120 euro a year here in the Netherlands).
I build an HRV about 2 years ago with fans that perform similar to the ones you picked and I am in the process of replacing them.