Attic Fan Cfm Rating

To facilitate faster air exchange would necessitate choosing a fan with a higher cfm.

Attic fan cfm rating.

17600 cubic feet 1600 11 what this means is that every eleven minutes the air in the home is being exchanged by a fan of this rating along with having windows open in each room. If you have 1 200 cubic feet of attic the calculation is 1 200 x 0 6 720. I read that venting is important. As the attic cools the smart fan will automatically cycle down to lower speeds the lowest being 1 000 cfm which only uses 15 watts of energy resulting in a cheaper air conditioning bill and cooler home temperature temperatures can drop as much as 50 degrees these two factors make it an excellent energy and cost saver.

You d need an attic fan rated at approximately 720 cfm. An attic fan used for venting pushes the hot air out the roof space so if it isn t replaced from outdoors you get depressurization.