I am trying to cool my attic to lower the temp. in my house in the summer. I already have 6" of insulation. What about an attic fan?

Asked by John Chaviers
Houston, TX

1200 sq ft house; 3-ton 16 SEER A/C will not keep up during 90-degree days. Attic temp is 155. A/C runs all day but gets 80 degrees at three o'clock in the afternoon. I want to cool the attic space. I am torn between attic fans to remove heat, insulation, or radiant barrier. I am in the HVAC industry -- the A/C unit itself is working fine.


Jason Kliwinski

Answered by Jason Kliwinski

Lambertville, NJ

The Green Living and Building Center

March 8, 2011

A solar-powered attic fan would be best.

  • Get one that runs on a temperature sensor.
  • They are readily available and easy to install yourself.

Adding a radiant barrier to the underside of your attic structure will help reduce heat gain in the space, but be sure to check your roof-shingle warranty and make sure it would not be voided by such a measure.


For more information:

Read "How effective are the different attic ventilation methods? I read mixed reviews, and many have a commercial bias." a Q&A answered by Danny Kelly.

Tagged In: attic ventilation

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