How To install Bathroom Fan Without Attic Access

When installing a bathroom fan, access from the attic is always easier. Unfortunately, this is not always the case. It may be easier to install a bathroom fan with an attic outlet, but it’s not the only way. How do you install a fan in your bathroom if you can’t access it?

It is best to install a ventilation duct between the nearest exterior wall and the ceiling joist. Be careful not to cut the joists for any reason. You need to make sure that the lines are properly connected and that the wiring has been laid. If you are not good at electrical work, you can   hire an electrician for that particular part.

There is a way to get the desired result without this access, which makes it a bit easier. This guide provides steps and information on how to install a fan if you don’t have access to the attic.


Yes, you can do it yourself. It’s very difficult and the process can be a bit complicated so it takes time. However, you can do it yourself. If you want to try this project for yourself, here are the steps you can take.

Step 1. Check the duct and enclosure size.

Before purchasing a new exhaust fan, you need to remove the cover from the old one and measure the exhaust fan housing. It will be between the drywall. Here is the size of the new fan.

Step 2: Hittins Switch

If you want a new fan to be able to use the old fan switch, that’s it. However, if your new device has a heater, light sensor, or humidity sensor and you need separate switches, you’ll need to plug them in and purchase them as well.

Step 3. Remove the old fan

Before installing a new exhaust fan, the old one must come out. Switch off the power supply first. The last thing you want to do is take an electric shock when replacing a fan.

Step 4: Complete the wiring

After removing the old fan, and checking the size of the new fan and duct, if applicable, remove the junction box cover on the new exhaust.

Step 5. Connect the lock or cable connector.

A duct connector is a piece of plastic used to connect an air duct to a new exhaust fan. There are dampers or shutters that close when the fan is not in use. When installing the latch, make sure it is facing down. This allows air to escape but not return.

Step 6: Connect the wiring

Once the housing is secure, connect the wires fully. Note that the wiring was previously stretched but not connected. New fans can be plugged in quickly, but other fans will need a wire nut to twist the wire.

Step 7. Close and reinstall the case.

The last step is to seal the room with a small amount of sealant to prevent air leakage. If you don’t want to use a gasket, use an aluminum-to-metal tap to glue the edges of the case together.

Hire an expert

It makes sense that some jobs require more confidence and skill than others. Not everyone is comfortable enough to do this type of work. The question arises, what does a specialist need for the job?

Get in touch with a professional

Trendy Bathroom Remodel Works is one of the best remodeling company in Vacaville CA. It carries out all bathroom remodeling works for individuals, property managers, and condominiums, as well as for professionals. Their quotes are precise and detailed, indicating the work that will be done in your home.

Contact us today: 7072046518

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How To install Bathroom Fan Without Attic Access
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