Since a bathroom vent fan should run for 10 15 minutes after you finish your shower to remove all the moisture consider a fan that cuts on and off automatically using a moisture sensor or replace the wall switch with a timer.
How to replace a bathroom wall fan.
Follow steps 3 10 of the new construction installation to complete.
Select your new fan.
The first step is to turn off the electricity of the bathroom from the breaker box.
There are ductless vent fans that use a charcoal filter to remove odors but they do not remove excess moisture which is the main purpose of a bathroom vent fan.
Video tutorial on how to replace your bathroom exhaust fan in 5 minutes or less.
Turn the bathroom fan or combination light and fan on.
If your old fan wasn t attached to a joist and there is a space between the joist and the ceiling hole attach lumber to the joist to build it out next to the hole so the fan can be screwed to solid wood.
Preparing to replace the fan 1.
When you know the switch has power this is indicative that you need.
Connect the red wire to one switch terminal and the black wire to the other terminal.
Switch off the power at the fuse box.
For a fan and light switch with existing wiring splice the white wires and connect the grounds securely with wire.
This is essential in order to.
To remove excess moisture from your bathroom the fan needs to vent outside.
On the side of the hole opposite the joist attach a piece of 1x lumber inside the hole.
Many bathroom fans are hard wired through your ceiling or attic.
Step 4 attach fan.
Measure the ceiling opening and determine if it is large enough to accommodate your new fan.
Double check the type of fan you currently have.
Check if a permit is necessary.
Add a bathroom exhaust fan in the wall.
Connect power to both switches through two pigtails spliced to the feed wire.
I ve replaced lots of this style broan fan and they are very popular.
Remove the existing fan leaving the old duct work and wiring.
Step 2 trace position of fan and cut out hole.
Call up your local city or county government and ask if you re allowed to do home.
If not you must cut around.