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Electrical Wire and Cable

Wiring a Bath Exhaust Fan Speed Control

By Dave Rongey - Summary:

How To Slow Down or Control a Bath Exhaust Fan: Bathroom Exhaust Fan Speed Control Options. Options when an exhaust fan is too fast and a slower speed is needed, or a variable speed will work better.

Bathroom Exhaust Fan or Extractor Fan

  Electrical Question: My exhaust fan moves too much air  can I use to make it a 2-speed fan?

This electrical repair question came from: Ken, a Handyman from Calgary, Canada.

Dave’s Reply:
Thanks for your electrical wiring question Ken.

How to Slow Down a Bath Exhaust Fan

Application: Installing a Bathroom Exhaust Fan Speed Control Switch
Skill Level: Intermediate to Advanced, best installed by a licensed electrical contractor.
Tools Required: Basic Electricians Pouch Hand Tools and a Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with tools and the access to the wall switch for the exhaust fan and if a larger switch box will be required.
Precaution: The bathroom exhaust fan circuit should be identified, turned OFF and Tagged with a Note before working with the wiring and installing the fan speed switch.

Control Options for a Bathroom Exhaust Fan

More about Electrical Wiring  for a Bath Exhaust Fan

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2 Responses to “Wiring a Bath Exhaust Fan Speed Control”
  1. Dave Rongey says:

    Hi Jerry,
    When replacing a light fixture your first measure of safety is to locate the circuit breaker that controls the circuit for the light fixture and turning it OFF, however making sure the light switch in the room is OFF would be OK when making the wiring connections only for the light fixture wires. If any other wiring is found in the light fixture junction box that will be involved in the light fixture wiring then the circuit breaker for the power source should be turned OFF. Weather the exhaust fan or outlets are on the same circuit breaker as the light fixture would depend on the age of the home and how it was wired, and this is best identified when using a voltage tester.

  2. Jerry says:

    I’m trying to replace a bathroom light fixture because the current fixture has stopped working. I Know very little about electricity. I found a breaker to shut off outlets in room, but exhaust fan does not shut down with any of the breakers I have tried. Is the exhaust fan and the lights on same circuit? If so, how do I power this down so I can safely change the fixture?