bathroom vent


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Old 06-28-05, 07:49 PM
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bathroom vent

hi folks
what is the recommendation for size of exhaust fan in bathroom in relation to square footage of the bathroom?
thank u
 
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Old 06-28-05, 07:58 PM
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Get the highest volume fan you can afford. You are talking moist air here and the quicker you can get it out, the better. I realize that some are noisier but you want volume. Good luck.
 
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Old 06-29-05, 06:43 AM
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Fans are rated for CFM, cubic feet per minute of air moved.

Get one rated for your size bathroom, or bigger.

That's the length x width x heigth of your room (measured in feet)
 
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Old 06-29-05, 12:27 PM
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my bath is 5' wide x 12' long x 8' high.
 
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Old 06-29-05, 12:40 PM
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If my math is still okay thats 480 Cubic Feet.
 
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Old 06-29-05, 01:19 PM
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From the Broan website:

Bathroom fan sizing:


For an 8 foot ceiling, take the square footage of the room, multiply it by 1.1.


For any ceiling over 8 feet, take the height of the ceiling and multiply by .1375. Take this figure and multiply by the square footage of the room. This will equal the recommended CFM's. (Example- 10' x 12' room with 10' ceilings. 10' x .1375 =1.37 x 120 square feet = 164 CFM's.)


Both calculations will give you the minimum recommended CFM.
 
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Old 06-29-05, 01:30 PM
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Wink

My books all show the cfm for the fan as to just sq ft of the bath is all. So like a 45sq ft bath needs a 50 cfm 55 sq ft bath needs a 60 cfm fan. As you have a 5'X12' == 60 sq ft Id go for a 70cfm .

ED
 
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Old 07-01-05, 01:05 PM
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thanks 4 the help friends
 
 

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