DIY Projects

How to Replace a Bathroom Exhaust Vent Fan

By: Danny Lipford
Removing the cover on a bathroom exhaust vent fan.

Removing the cover on a bathroom exhaust vent fan.

Bathroom exhaust vent fans are needed to remove excess humidity that can lead to mold or mildew and cause damage to your walls or ceiling. Unlike older vent fans, new models are much quieter and more efficient. Here’s how to replace an existing vent fan with a new one:

  1. When choosing a vent fan for your bathroom, look for a model that is quiet (1.5 sones or less) and moves enough cubic feet per minute (CFM) of air as discussed in sizing a bathroom vent fan.
  2. Cover the bathroom floor to protect it from scratches.
  3. Turn off the circuit breaker that controls the bathroom vent fan.
  4. Remove the cover on the bathroom vent fan.
  5. Disconnect the wiring and remove the fan motor from the housing.
  6. Disconnect the vent pipe from the fan housing.
  7. Remove the vent fan housing.
  8. If needed, adjust the existing hole in the ceiling to fit the new vent fan housing.
  9. Attach the vent fan housing to the ceiling joists.
  10. Connect the electrical wires to the vent fan housing.
  11. Connect the vent pipe to the fan housing.
  12. Attach the vent fan motor and electrical wires to the housing.
  13. Snap the cover or trim on the vent fan.
  14. Turn on the circuit breaker and test the vent fan to make sure it’s working properly.

Watch this video to find out more.

Further Information



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4 Comments on “How to Replace a Bathroom Exhaust Vent Fan”

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  • carol Says:
    February 7th, 2018 at 7:34 am

    Ive had a exhaust fan installed 2 yrs ago and realize I would have preferred a fan with a heated option , is this as easy as switching it out or is the electrical set up going to be an issue.

    September 2nd, 2017 at 8:55 am


  • leo kelly Says:
    September 1st, 2017 at 4:32 pm

    my home was built in 1947 and doesn’t have a fan nor there isn’t room in the ceiling. am I able to get one installed on a vertical exterior wall? I am a disabled veteran that could really use your help with that and some other things.
    possible a future show (hint hint)

    leo kelly

  • Steven Johnson Says:
    December 29th, 2016 at 1:56 pm

    Can a bathroom exhaust fan be vented into a plumbing stack that runs through the roof or will that cause some sort of down draft problem?
    Steve Johnson

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How to Replace a Bathroom Exhaust Vent Fan