Crawl space fans

jnarchitects | Posted in Mechanicals on April 21, 2014 09:03am

Does anyone have a recommendation for crawlspace exhaust fans?

Would an appropriately sized Panasonic be the simplest option?

Answer

GBA Prime

Join the leading community of building science experts

GBA Editor

Martin Holladay | Apr 21, 2014 10:15am | #1
Jill,
Panasonic fans have an excellent reputation. You would probably want to choose the WhisperWall model for rim-joist mounting.

Overventilation entails an energy penalty, so your fan may need a timer to be sure so that it only operates (for example) for 20 minutes per hour. The recommended ventilation rate is 1 cfm for each 50 square feet of crawl space floor area.

For more information on crawl space ventilation, see Building an Unvented Crawl Space.
02jack | Apr 28, 2014 03:46pm | #2
I would suggest you also look at Tjernlunds products. They have some very nice ventilation solutions.