HPWH – To duct or not to duct?, that is the question
As noted in an earlier question, I will be putting a heat pump water heater in my crawlspace. The Rheem unit I have allows ducts. I want to get the maximum circulation of air in my crawlspace to dehumidify it and am wondering if ducting the cooled exhaust to the far end of the crawlspace might be worth it. Rheem says I can use up to 125′ of 8″ flex duct, which should be more than enough.
Does ducting result in any penalty as far as efficiency? I am thinking it will be a wash, since moving the cooler air to a higher point in the crawlspace should result in more circulation as it travels back toward the unit, picking up heat and moisture on the way.
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