How To Choose a Bath Fan
Bath Fan Types
Standard Exhaust Fan
- Moves air and moisture up and out of the bathroom area
- Ceiling mount or wall mount applications available
- Typically comes with an array of different features
- More powerful exhaust fan
- Installed within the attic and does not rest on the bathroom ceiling
- Helps reduce the amount of sound heard in the bathroom
- Typically needs at least 8 feet of flexible ducting to work properly
Energy Star Criteria
- Greater efficiency and comfort with less noise
- Improved performance motors
- Improved blade design for better performance and a longer life span
|10-80 cfm||2.0 sones|
|90 – 130 cfm||2.0 sones|
|140 – 500 (max) cfm||3.0 sones|
Source: energystar.govShop All Energy Star Exhaust Fans
Keeps your bathroom safe and easy to see at night.Shop All Bath Fans with Night Lights
Keeps your bathroom warm during colder months.Shop All Bath Fans With Heaters
Initiates the fan’s use when it detects increased humidity.Shop All Humidity Sensing Bath Fans
California customers need to ensure that their bath fans are Title 24 compliant and meet set standards in regards to air quality.Shop All Title 24 Compliant Bath Fans
Initiates the fan’s use when someone enters the room.
Keeps your fan running for a set amount of time.
Home Ventilating Institute is a nonprofit that assures products meet particular standards.
Cubic Feet per Minute; measures the amount of air the fan can move. The higher CFM means the better the ventilation potential.
Measures the perceived loudness of the bath fan. NOTE: A refrigerator is about 1 sone.
Determines whether or not the exhausted fan is rated to be applied in a damp or wet condition, such as a bathroom.
Measures the diameter of a bath fan duct.
Measures the amount of amps the bath fan needs at highest capacity. Typically, higher amps mean more power and more energy needed to run.
Measures the electrical potential of the bath fan.Note: Not all exhaust fans are meant to be installed within a bathroom. For it to qualify as a bath fan, then it must have the proper UL listing for either wet or damp locations. Typically, the bathroom version may be a little more expensive than the simple exhaust fan option. Most manufacturers have both for each fan style.
Bath Fan CFM CalculatorUse this calculator to figure out the correct number of CFM needed for a your bath fan.
The measurement of Cubic Feet per Minute (CFM) determines the amount of air movement the bath fan is capable of. If the CFM number seems significantly high, then consider the in-line fan option to reduce the sound heard within the bathroom space.
Bathroom Length (feet) x Bathroom Width (feet) x Bathroom Height (feet) x 0.13 = Minimum CFM neededExample
Bathroom length is 12 ft; width is 7 ft; height 8 ft
12 x 7 x 8 x 0.13 = 87.36 cfm minimum needed