Can a bathroom exhaust fan dump air (discharge/terminate) in the attic?
Saturday, August 4, 2018
Both the International Residential Code (IRC M1501.1) and Residential Edition of the Florida Building Code (FBC) are very specific: the air must be discharged to the outdoors, and vent termination into an attic, ridge vent or crawl space is excluded.
The most common way we see in our area to correctly terminate a bathroom exhuast fan is to a vent grille in the soffit, as shown in the photo above. Running it up to near the ridge, like in the photo below, might see sensible but it’s a no go. There is a lot of moisture in bathroom exhaust air and it needs to go all the way out.
For more info about bathroom exhaust fans, see these other blog posts:
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To learn more about heating and air conditioning systems, see these other blog posts:
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