Great post. My reading suggests that for a small house a small bathroom fan run on a timer is sufficient to exchange adequate bad air for good. Panasonic gains the nod for efficiency and sones.
that FV-04VE1 HRV though. what a nice unit. Off grid, on low/low. 20 cfm setting on low (10 cfm) it's 17 watts. x 24 hrs = 408 watts daily. That's a pretty big load.
Maybe time to open a window. And another nod to the bathroom fan on a timer.
So, to my point. Instead of undercutting your doors, transom windows above the door to bedrooms allow warmer stale air to move more easily to the HRV/fan. Allow light to filter between the rooms unobtrusively. Controls noise between rooms. And made my grandmother happy.
Now how can you beat that?
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