Bathroom Fan Installation Through Finished Attic

The master bathroom and the 2nd bathroom vent through the roof and through the same opening.

Bathroom fan installation through finished attic.

Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof. Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic. When you replace a bathroom fan in a home with an attic the job will usually be a lot easier. They exhaust moist or stinky air outdoors while pulling in cleaner drier air from your surrounding rooms.

In this post i ll show you how to replace a bathroom fan in a finished ceiling where you can t access it from an attic. This system is quiet too. This makes removing the old housing and installing the new housing a much less complicated job. Bathroom ventiliation fans are an essential component to any bathroom.

For bathroom over 100 sq ft use a large or exhaust fan to circulate the air. For instance if your home has an attic you can get to the fan from above. Climb into the attic and clear away any insulation from around the hole. Determine where the ceiling joists are and do not cut into the joists for any reason.

The first step in figuring out how to install a bathroom fan is cutting a hole based on the size of the fan you need. A grille in each bathroom attaches to ducts which then fasten to a y connector at the fan. Look for the special fans starting at 160 at heating cooling equipment. The warm air will exhaust out the duct and enter back into the attic through the soffit vent or ridge vent.

The optimal location for a bathroom fan is between the toilet and the shower. A single exhaust exits through the roof figure a. Draw a mark on the bathroom ceiling where you d like to install the vent fan. If you have access to the attic the fan can vent either through a gable wall or roof.

The 2 pipes one a 4 master and the other a 3 2nd do not go through the ceiling but into a common box that goes through the roof. Because the fan is in the attic you ll hardly hear it. For optimum performance locate it between the shower and the toilet. The best way to proceed with a bathroom fan installation with no attic is to run the venting duct between the ceiling joists and through a nearby exterior wall.

Small bath fans provide adequate bathroom ventilation for 79 sq ft. You mount a switch in each bathroom.