Will I get too much back pressure if I try to exhaust two bathrooms with a 200 cfm fan using 6 in ducting but terminating in a 4″ soffit vent… Will I get too much back pressure if I try to exhaust two bathrooms with a 200 cfm fan using 6 in ducting but terminating in a 4″ soffit vent…Read MoreGreenBuildingAdvisor
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