Reliable exhaust fan for the bathroom...


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Old 07-31-11, 02:11 PM
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Reliable exhaust fan for the bathroom...

I've poked around HD, Lowes, and Amazon and haven't been convinced to buy any of the fans at these places. I'm looking for a quiet fan (2.5 sones or less) and a CFM rating of at least 55.

Can anyone recommend a decent exhaust fan manufacturer? It doesn't have to have a light built into it.

Thanks,

Andy
 
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Old 07-31-11, 06:46 PM
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Bron makes good fans. 55 cfm is two small for even the smallest bath rooms. Smallest I'd go would be 90 cfm
 
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Old 07-31-11, 11:25 PM
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Airman meant to write Broan which is the same company as Nutone. Panasonic makes good bathroom fans although a little higher in cost than the Broan / Nutone. If you want a really quiet fan then an in-line fan from Fantech may be your best bet.
 
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Old 08-01-11, 07:49 PM
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Broan yes that's it! Thanks furd.
 
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Old 08-02-11, 07:52 AM
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airman / furd,

Thanks for the info. I came across one Nutone review (at either HD or Lowes) that had mixed reviews. I'll look at the other two as well.

I had based the CFM rating on calculations I found online (the guest bath is just 8.5'X5'x9' (height). You still think I should get something higher than 55 CFM?

Thanks,

Andy
 
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Old 08-02-11, 08:13 AM
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Yes...you need bigger than 55cfm if there is a shower or tub in the bath. I agree...something around 90 would be better. Hows the ducting and where is it exhausted?
 
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Old 08-02-11, 10:55 AM
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Even that small of a room has a volume of over 300 cubic feet. The "standard" is four air changes per hour which would mean a fan of a little over 1-1/2 cubic feet per minute.

HOWEVER, the "standard" is woefully inadequate in my opinion. There will be many other factors that will tend to reduce the real airflow and I recommend never using anything less than a 100 CFM exhaust fan in a bathroom. A 100 CFM fan might achieve a 50% airflow meaning that you would actually get about ten air changes per minute.

I know that sounds like a hurricane force wind but trust me, it won't be too much and it will cause the smells to be dissipated much quicker. You will need to install a supply air source low to the floor, either a grill or cut off the bottom of the door so it clears the floor by at least 1-1/2 inches.
 
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Old 08-03-11, 05:51 AM
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Yes, there is a shower in the room. There's one duct in the room, and the exhaust fan is about 1 foot to the right of the shower (near where the wall and ceiling meet). Guess I'll look at larger units based on what you've said.

Thanks,

Andy
 
 

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