Product Info
Fantech Heat Recovery Ventilator VHR 2004 VHR2004
Sizing For Your Residential Needs HRVs/ERVs are typically sized to ventilate the whole house at a minimum of .35 air changes per hour. To calculate, simply take the square footage of the house (including basement) and multiply by the height of the ceiling to get cubic volume. Then, divide by 60 and multiply by .35.
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