Posts Tagged ‘Exhaust hood’

Panasonic Bathroom Exhaust Fan

When sizing and selecting an exhaust fan you will need to determine the appropriate CFM (cubic feet per minute) of air that it will move. Since all fans are rated by CFM they should all be the same, right? If you think it could only be that easy, you’re wrong.

How To Properly Size a Kitchen Exhaust Hood

There are 2 ways to correctly size the fan. The first method is to allow 1 CFM of air flow for every 100 BTU’s of heat output of each appliance. The second is to allow for 15 ACH (Air Changes per Hour). To calculate that you would use the formula width x length x height= cubic feet/4. Then multiply by 15 ACH and divide by 60 minutes = total CFM’s needed.

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