Quote:
Originally Posted by Ducay
Keep in mind only combustion air can be controlled by an automatic damper that is furnace dependant. Make-up fresh air shouldn't be (since it is making up for non-furnace losses, bathroom vents, etc). All a HRV does is make that air warmer as it comes in.
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Not exactly correct. my make up air is controlled by a damped blower motor. it turns on whenever any fan on the house is turned on - bathroom fan, range hood, furnace, etc... This is the best and most cost effective solution. an HRV does the same - it closes when not running, and turns on when you need it to (ie: any fan in the house is turned on)
My house's (builder-installed - so not my idea!) current solution is the most cost effective, IMO - you get the dampening of the cold make-up-air with lots of the benefit of an HRV (except it brings in cold air still, not nice, room temperature outside air like an HRV does)