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#1
08-30-2007, 08:48 PM
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HRV's are only an option to reducing heating costs by recovering some of the heat being exhausted. To elimate moisture issues you must "exchange air" simple as that.
If you are truly serious about not having any moisture issues, a make-up air system should be considered. This would include a small furnace with a stainless steel heat exchanger to draw 100% fresh air from the outside, there would also be an exhaust fan interlocked with the furnace. The cfm output of the furnace and exhaust fan should be close in performance. An HRV can then be used on this to recover some of the cost running this system when its -40.
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M2CW 
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#2
08-30-2007, 08:54 PM
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For whatever reason, our house is at 75 humidity as well and we are having problems as listed above. As we only have a 3 gallon tank in our house, the issue has to be other things. We are looking into getting a dehumidifier to help with the issues. From our research so far, Home Depot seems to have some at reasonable prices with quality names.
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240 gallon tank build: http://www.canreef.com/vbulletin/sho...d.php?t=110073
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