I have window fans in my attic windows, one bringing air in and one taking air out. Is this a good idea?

Asked by Kelly Randall
Springfield, OH

I didn't see this in the last responses on this topic. I have a 940 square foot house with a walk-up attic. I have a very small vet(not fan) on the east side of the roof. I also have a slider window on the south and north ends of the roof. The first couple of summers I left both windows open about 2 to 4 inches - this seemed to help a bit. The last 2 years I have had window fans in these windows one bringing air in and one taking air out. The attic is insulated well - the house was built in 1931. I was looking at putting an automatic attic fan in but after reading the latest on this blog I guess not. I guess what I need to know is if the way I have the fans set up in the windows is even a good idea. My house is a ranch and the lower level remains fairly cool with the ac set at 72 even in the hottest weather. If it helps I live in Springfield, Ohio


Sean Lintow Sr

Answered by Sean Lintow Sr

Naperville, IL

SLS Construction & Building Solutions

July 29, 2013

If you don't mind I think we need to clarify - what difference do you see or feel inside the house or is it just when you enter the attic? Are you in the attic a lot? If you are in there a lot there are better options, but if the fans help you then no worries. 

But if you are hardly up there, and don't notice any issues downstairs then they should go.

If you do notice some issues then you might want to check how well sealed the attic is. Where do you feel the heat coming in? There are ways of insulating hatches, doors etc... without wasting money running fans.

If in doubt consider bringing in a local experienced energy auditor or contractor.


For more information:

Read "Our attic gets so hot!! Is there anything we can do that we haven't already done to cool this space?"

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