The installation is easiest if you re replacing an existing fan.
Easy way to install bathroom fan.
You can use the existing switch wires and ductwork.
Remove the existing fan leaving the old duct work and wiring.
Connect power to both switches through two pigtails spliced to the feed wire.
Turn the power back on and test your new bathroom fan to make sure it s working.
This video shows how home renovation brothers dave and rich remove and install a bathroom exhaust fan.
For a fan and light switch with existing wiring splice the white wires and connect the grounds securely with wire.
Follow steps 3 10 of the new construction installation to complete.
Also it helps to get a fan that s the same size as your existing fan so you won t have to adjust the size of the ceiling hole.
Photo by keller keller photography.
Use the information below to select a fan.
If not you must cut around.
Switch off the power at the fuse box.
Typically either a bare wire or green wire will attach to the side of the metal housing for grounding a critical safety measure.
Measure the ceiling opening and determine if it is large enough to accommodate your new fan.
Draw a mark on the bathroom ceiling where you d like to install the vent fan.
Fans are rated by cfms and sones.
Install the decorative plastic grille by slipping its mounting wires into the available slots in the housing unit.
At this point you will strip the ends of the electrical wires and hard wire them into the unit.
Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.
For optimum performance locate it between the shower and the toilet.