How to Install a Bathroom Fan?

A bathroom fan is considered as an essential home tool, because it is useful in eliminating moisture and foul odors from your bathroom. It also prevents molds and mildews from growing. Because it is good in eliminating moisture from the air...


It can also prevent windows and doors from warping; and paint and wallpaper from peeling. So if you don’t have a bathroom fan at home yet, you must think of installing one to enjoy the above-mentioned benefits.

You simply need fundamental carpentry and electrical skills to get the job done. Plus this article will equip you with necessary knowledge on how to install a bathroom fan.

Consult Your Local Electrical Inspector

Before you proceed with the installation proper, it would be better to ask your local electrical inspector if you need to secure a permit, since this task deals with electrical wiring.

Electrical Inspector

Prepare the Bathroom Fan to Be Installed

There are many high quality bathroom fans at home centers that you can choose from. These new releases are quite silent, produce more air, and use less energy as opposed to older models, so you must take advantage by buying a new bathroom fan.

Bathroom Fan

Drill a Hole and Put a Mark on the Ceiling

Make use of your drill and a 3⁄4 inch (1.9 cm) shovel bit to drill a hole in the ceiling that will serve as your reference as you begin to install the fan. Don’t forget to get the measurement of the vent fan housing.

Next up is to go to the attic and determine the reference hole, and get rid of its surrounding installation. Refer to the measurements of the fan housing to make sure that the fan fits well in the selected spot.

Drill a Hole

Next up is to go to the attic and determine the reference hole,Return to the bathroom to get the measurement of the intake port of the fan, which you will need so you can cut the suitable size of the hole in your ceiling.

You will also need a pencil and a framing square to mark the position of the intake port of the fan with the use of the earlier measurements. and get rid of its surrounding installation.

Refer to the measurements of the fan housing to make sure that the fan fits well in the selected spot.

Cut the Hole on the Ceiling’s Intake Port Hole

Using a jigsaw, cut the spot you previously marked in the previous step. A drywall saw can also be used if there’s no jigsaw available. Make sure that the ceiling’s cut section does not fall to the floor as you cut them to prevent pulling extra pieces of plaster with it.

Use your hand that does not hold the jigsaw to upkeep the ceiling. Don’t forget to wear a respirator and safety goggles as you saw through drywall and plaster to drywall to shield your lungs and eyes.

Place the Fan in the Chosen Position

Before you can put the fan into the sewed hole, you must attach first a 90 degree duct elbow to the proper outlet port with the use of a foil duct tape.

Afterwards, you can now insert a cable connector on the detachable knockout hole on the fan's housing side. Then you can now glide the secondary metal brackets in its proper places.

setup fan

Place the fan at the center and above the ceiling hole. Lower it a bit to go to its proper place. Ensure that all holes are connected properly.

Make Sure That the Fan Are Secured to the Joists

As soon as the fan is already placed in its proper position, you can now extend all metal brackets as they touch the joists on housing unit’s both sides. You can use drywall screws to secure both ends of the bracket to the joist.

Afterwards, bring the length of duct pipe and connect one end to the 90 degree duct elbow originating from fan housing with the use of a foil duct tape.

Determine the Appropriate Exit Point for the Duct Pipe

The next thing that you need to do is to determine the straightest and shortest route from the housing fan to its exterior. Remember that the shorter the duct pipe, the more efficient the bathroom fan will function.

Duct Pipe

Connect the Vent Cap

How you will attach the vent cap depends on whether the exit point is on the sidewall, or on the roof.

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    If sidewall is your exit point, choose a point between two wall studs and bring some measurements so you can find the same point as you go outside.
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    If roof is your exit point, sketch a suitable-sized circle on the interior and utilize a saw to cut it out.

Proceed to the roof and don’t forget to take necessary safety precautions with you. Eliminate the grits concealing the newly cut hole and install the vent cap with the use of roofing nails and cement. Remember also to replace loose shingles, if there is any.

Activate the Connections in the Housing Unit

Read the manual instructions before you activate the connections in the housing unit, because it depends on the type of fan you have, whether you will wire connections from bathroom, or from the attic. Of course, the most important is to switch off main power before your proceed.

Housing Unit

Fasten the Grille

You are now down to the last step. Plug the motor into the electrical container and fasten it using the screws that come with the fan. You can now install the plastic grille by sliding its mounting wires into the existing slots in the housing unit.

It should sit comfortably against the ceiling. If you feel the need to spread the mounting wires a little more to produce more tension, then do so. Finally, you can now turn on the power and test if your bathroom fan is functioning well.


At first glance, you may find installing a bathroom fan a bit of a heavy task than an easy-to-do DIY task. But as soon as you begin tackling the project, you’ll realize that with patience and adequate knowledge on the steps...

On how to install a bathroom fan, you will surely finish the project smoothly. Kindly share this article with your family and friends via social media, so they can also get helpful insights about installing a bathroom fan.

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