Bathroom Fan CFM Calculator Bathroom Length (feet): Bathroom Width (feet): Bathroom Size (square feet): Bathroom Length * Bathroom Width Fixtures: Toilet Shower Bathtub Jetted tub 50 CFM's Required For Bathroom Fan To use the calculator, simply measure the square feet of your bathroom, usually...
And then you can view the chart to compare your bathroom fan’s noise level to common activities. Sone to Decibel Calculator Room Size (Sq Ft):* Ceiling Height (Feet):* Air Changes Per Hour (ACH):* 27 CFM Sone to Decibel Chart: Sones dBa Examples 0.3 Sones 11 dBa Normal breathing 0....
To adequately determine how many CFM bathroom fan we need, you will have to measure length, width, and ceiling size of your bathroom. You can calculate manually or using the CFM calculator below. You can read an insightful article about how to determine how many CFM bathroom exhaust fan you...
Broan Fan Model EZ80N can run up to 34 ft. [Click to enlarge any image] When we change the design CFM to 60 we see that with a 3" duct this fan WILL NOT WORK period. When we then change the DUCT DIAMETER to 5 inches, the calculator says yeah, you're good, no limit. Watch ...