Can a HPWH be installed into a unity closet with venting in and out of a garage?
I am looking at getting a HPWH for a house that is above my detached garage. The furnace and water heater is in a little closet in the garage, and would not be big enough air for the HPWH. I would like the exhaust and return be from the garage and only the exhaust being vented with the return being just a vent without the ducts. Since the closet is sealed off of the garage and is not from the house would this cause an issue? Would the only way be exhaust and return to outside or would I have to put ducts on the return if I did want it venting through the garage?
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