Cold Air Bathroom Exhaust Fan
Cold Air Bath Exhaust Fan TIPS
- Fan dampers designed to stop mice, not air
- Spray smooth metal exhaust pipe with magic foam
- Exhaust pipe should exit side wall of house
- Roof exhaust is good in no-snow areas
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David Teal lives in Woodville, Ohio.
He has a problem that many people have. Let him tell you:
"A few weeks ago you had a article that discussed sealing and insulating a house. You failed to mention holes in the ceiling. I have five holes in my ceiling for vent fans.
The flaps inside the fans don't work well at all. When the wind blows the bathrooms are freezing! Is there something I can do besides taping over the vent holes?"
Here's my answer to David:
Thanks for reading my syndicated newspaper column. As you might suspect, the newspapers limit the number of words I can put in a column. As such, it becomes impossible to discuss each and every aspect of a problem. I usually have to deal with a thin slice of the problem.
The dampers in just about every exhaust fan I've seen are virtually worthless. I believe they're meant to stop animals from getting back into the rooms of homes, not air.
I'd recommend you install a flapper cap that has a double seal.
I used the product below at my own home last year and love how well they seal. I've completely stopped all the cold air from coming into my bathroom using this product. CLICK HERE to buy it.
Seal the Pipe
You also need to make sure the seams on the smooth metal exhaust pipe are sealed AND the pipe is insulated. The best way I've found to do this is spray the outside of the pipe with spray-foam insulation. Clean the mill oil off the pipe first with soap and water. Use this foam: