[damo]

Hello to all! Im a new guy here on forum reading great posts here and hoping later i can contribute some experience and knowledge...

Since recuperators or heat recovery ventilation units are very expensive plus none has all the features I want, I decided to build one on my own.

Electronics will be done with arduino and additional sensors, if you are interested I will describe it in detail later. Heat exchanger will be aluminum counter flow,purchased for about 200$. Housing is also not a problem. I stucked with buying some affordable centrifugal EC fans.

Fans should be EC type, with ball bearings and controllable rpm. As my house has 200 m2 my target flow is 300 m3/h max. Can you recommend some fans with goog price? I know some ebm which are used by SUN are good priced on ebay, but I am looking for centrifgal type, not axial.

Any hint or info appreciated.

Best regards from Slovenia!

Damo