How To Choose a Bath Fan

Written by: Erica Spangler
Design Specialist
(800) 375-3403
Bath Fan Inspiration

Bath Fan Types

Standard Exhaust Fan

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
In-line Fan

In-line Fan

  • 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
Decorative Bath Fan

Decorative Bath Fan

  • Provides many of the same features as a standard exhaust fan
  • Typically offers a light
  • Meant to match your bathroom décor

Energy Star Criteria

Energy Star Bath Fan
  • 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


Shop All Energy Star Exhaust Fans

Common Features

Night Light

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

Humidity Sensing

Initiates the fan’s use when it detects increased humidity.

Shop All Humidity Sensing Bath Fans

Title 24

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

Motion Sensor

Initiates the fan’s use when someone enters the room.


Keeps your fan running for a set amount of time.

HVI Certified

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.

UL Listed

Determines whether or not the exhausted fan is rated to be applied in a damp or wet condition, such as a bathroom.

Duct size

Measures the diameter of a bath fan duct.

Amperage (amps)

Measures the amount of amps the bath fan needs at highest capacity. Typically, higher amps mean more power and more energy needed to run.

Voltage (volts)

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 Calculator

Use 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 needed


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

Bath Fan CFM Calculator

Suggested CFM*
× Shipping Rates & Methods

The cost to ship items varies by item, shipment and shipping option.

Free Ground Shipping on Orders Over $49 *

Standard ground shipping transit time is 5-7 business days.

Free Freight Shipping on Orders Over $1500 *

Curb side delivery (also called freight or "LTL" shipping) is reserved for large, heavy, or oversized items like chandeliers, bathtubs, shower doors, etc. Items are palletized and loaded onto a large truck for shipment, and delivered to your curb by scheduled appointment. Transit time is 7-10 business days.

* For exact shipping costs, add the product(s) to your cart and enter your zip code. All offers pertain to the lower 48 states and do not include deliveries to Alaska, Hawaii or Canada.

Learn more about shipping rates and policies