# Incredible Bathroom Exhaust Fan Cfm Sizing References

**Incredible Bathroom Exhaust Fan Cfm Sizing References**. Calculating what cfm you need is the most crucial part of how to size an upblast exhaust fan for your commercial kitchen ventilation system. Round up to the next whole number and then multiply that number by 8 (the number of air exchanges in an hour) to get your cfm value.

Therefore, it should have a fan rated for at least 54 cfm. Bath room 1 fv15vq5 you will need a speed controller, you need about 125 cfm the fv15 is 150 cfm i would keep the 150 cfm and you will need 7 duct (not flex duct) bath room 2 fv05 vq5 or fv08vq5 you fall between those two 6 duct will work for this one. Suggested cfm for the bathroom is based on cycling all the air in the bathroom 8 times per hour.

### Start By Measuring The Dimensions Of The Room.

Divide the number of cubic feet in your bathroom by the number of minutes in an hour (60). Posted in homyracks tagged bathroom, calculator, size. For instance, if your bathroom is 60 square feet (5.6 m 2) and your ceiling is 10 feet (3.0 m) tall, multiply them together to.

### From Data National Comfort Institute (Nci) Collected In 2009, The Typical Bathroom Exhaust Fan Moves Less Than 13 Cfm Or About 20% Of What It Should.

20.53 x 8 complete air changes per hour = 164 cfm needed. Divid 14,400 by 60 and you get 240 cfm. Here’s how we can finally get the bathroom fan airflow (in cfm):

### 80 X 10 = 800.

This means that a fan must have the ability to move 14,400 cubic feet of air in an hour. If your bathroom has multiple ceiling heights use the highest measurement. You can see that this is.

### Ceilings Which Exceed Eight Feet In Height Will Require Additional Cfm.

That means that this 8×10 bathroom with an 8 ft ceiling will require an 85 cfm fan. The formula to calculate bathroom exhaust fan size reads as follows: Press calculate * minimum suggested bath fan cfm.

### Calculate Size Of Ventilation Fan For Bathroom Of 10 Foot Long,15 Foot Width And 10 Foot Height.

Multiply the bathroom’s square footage by the ceiling height: Therefore, it should have a fan rated for at least 54 cfm. Simply enter the dimensions of your bathroom in the calculator below to determine the minimum size vent fan you need for the bathroom in your home.