ERV or HRV (yes, bringing it up again)
I’ve read all the articles and posts I can find on here about this question, and if anything I feel less able to make this choice than before. So many conflicting opinions. Here are the factors that affect the decision, as far as I can surmise:
-predominantly heating climate, but mixed and with hot, humid summers (SW Ontario) <-points to ERV? -medium sized house? 2430 square feet, no basement -3-4 occupants, higher than average humidity generation (not a lot of showers, but lots of cooking/baking – think 1950s housewife levels, then add some more) <-points to HRV? -tight house (<=0.2ACH@50 expected) -no air conditioning, other than tempering of incoming air via glycol ground loop -no forced air (besides the HRV/ERV fan) -ERV/HRV must exhaust the kitchen and bathrooms <-points to HRV, at least in winter? The original design called for a model of ERV we probably cannot get, which has this claim in its literature: “Futura will automatically maintain the optimum humidity in your house by means of a controlled enthalpy exchanger.” I can’t figure out if this means it’s actually smartly controlling the humidity exchange, or if it’s just marketing baloney. My previous understanding was that an ERV will, while not cooling the house, definitely reduce the heat gain in the summer. But I read lots of stuff on here suggesting that without A/C, it will do nothing. This doesn’t square with the fact that ERVs have a cooling efficiency rating, while HRVs don’t. Don’t know what to think anymore. :-/ Any advice for our particular conditions?
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