Clearance for HPWH
I’m considering putting a heat pump water heater into a bathroom/laundry room. The room has plenty of volume. I’m concerned about the clearances needed though. The Accelera models claim to need a 2′ clearance at the intake, and a 6′ clearance at the exhaust. That seems to limit the usage of this to rooms with a 10′ clear strip for the water heater. I know efficiency will suffer if it recycles air, but this seems excessive. Does anybody actually do this? If not, what are reasonable clearances?
It seems like the COP standards should spec minimum clearances. If you can’t get the COP with the unit installed 8″ from the wall in a corner with 4′ front clearance, it’s not real-world.
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