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How To Install Bathroom Vent Through The Wall

A bathroom vent fan should be found in all bathrooms. Many people ignore this device and overlook their functions. Your bathroom should have a bathroom vent because, without one, bathrooms become susceptible to excessive moisture build-up that results in damaged bathroom walls, floors, and ceilings. The warm and humid air that is caused by hot water baths allows for mildew and microorganism growth. Even too much moisture can soil interior room materials like wallboard, wall paint, and so on.

These are the reasons bathrooms should have a vent fan. It helps to exhaust warm, moist air and remove all unnecessary odors.

Also Read:

How to Vent a Bathroom with No Outside Access
How To Increase Ventilation In Basement?

Step To Install Bathroom Vent Through The Wall?

1. Drill a Hole

Before doing anything:

  1. Draw a mark on the bathroom ceiling to show where you would like to install the vent fan. You could locate it between the shower and the toilet.
  2. Use a spade bit to bore a reference hole through the ceiling.
  3. Measure the vent fan housing and position the vent fan between two joists near the reference hole.
  4. Keep this position in mind.

2. Make a Mark 

Measure the dimensions of the vent fan’s intake port to determine the size of the hole you need to cut in the ceiling. Make use of a layout square to draw the rectangular outline of the intake port on the ceiling. 

3. Cut Out the Intake-Port Hole

Make use of a jigsaw to cut through the ceiling on the layout lines. It is advisable to wear goggles and a respirator while you’re doing this. When you are almost done cutting, support the waste piece with one hand to fall.

4. Set the Fan

Fix a duct elbow to the outlet port on the side of the vent fan housing in the attic. Secure the elbow to the port with a foil duct tape. Pull out the knockout hole on the side of the fan’s housing and fix a cable connector. Place the four metal brackets into the tabs coming out from the sides of the vent fan. After that, place the vent fan down between the joists on the ceiling hole.

5. Fix the Fan to the Joists

Extend the brackets fully until they touch the sides of the joists. Secure all the brackets with a drywall screw. Slip one end of the flexible duct that comes with the wall cap kit over the elbow attached to the vent fan. Keep it intact with foil duct tape. 

6. Make a Duct Hole through the Sidewall

In the attic, choose a spot on the sidewall for the flexible duct to exit the house. It should be located within 6 feet of the vent fan. Use a 4-inch hole saw to cut a duct hole through the house.

7. Join the Exhaust Duct to the Wall Cap

After you have secured the wall cap to the outside wall:

  1. Go to the attic.
  2. Hold the free end of the flexible exhaust duct and stretch it to the outer wall carefully.
  3. Join the duct end to the wall cap’s connector duct with foil duct tape.

8. Set up the Wall Cap

Secure the connector duct to the wall cap with foil duct tape. Slide the wall cap into the duct hole and push it tight against the house siding from outside. You could use a foam-rubber gasket to fit into spaces where the wall cap doesn’t meet the siding. Remove the wall cap and add some silicone adhesive to the siding and gasket around the hole. Place the wall cap into the hole and push it against the siding. Then, secure it with four stainless screws.

9. Create the Wire Connections

Unscrew and pull out the blower motor from the vent fan housing. Keep the screws. Then, unscrew the inbuilt receptacle from inside the housing to expose its wiring. Keep the screws again. Join same-color wires with the ones from the electrical cable you fed into the housing using wire nuts (white to white, black to black). After that, wrap the naked wire under the green grounding screw inside the housing and make it tightened. Put the electrical receptacle back into position and use the screws you removed earlier to secure it.

10. Join the Grille

Lift the blower motor up to the ceiling and press its plug into the electrical holder inside the housing. Use the screws removed to secure the engine to the housing. After these, hold the plastic grille of the fan close to the ceiling. Put the grille’s mounting wires into the slots inside the fan housing. Push up the grill until you are sure it is tight against the ceiling. Turn on the power and test your fan.

Bathroom vent installation is done successfully. 

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