Quote:
Originally Posted by AC_Hacker
In the DIY HRV thread also, there is a procedure described that uses very large plastic bags, and their volume is estimated and the time-to-fill is measured. I know it sounds very crude, but it should give you a good approximation of air volume rate.
-AC
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If you want to do a proper measurement (including the duct losses), you should install plastic bags on all supply nozzles (in my case there are 5) and have someone with a stopwatch at each bag....
Otherwise you could only measure the hx + filters.
On the other hand... that's better than no measurements at all.
I had the opportunity to borrow a flow-measuring device that's intended to measure airflows from ventilationsystems (TSI Velocicheck including air capture hood).
In this way I was able to measure each separate supply nozzle and extraction nozzle and after that, I could adjust the nozzles so that incoming and outgoing air were really balanced.