Bathroom Fan Blowing Into Attic

You should never exhaust the bathroom fan directly into the attic.

Bathroom fan blowing into attic. You may have heard that it s okay to run your bathroom extractor fan into the attic or upper living space of your home. Many assume that the fan vents outside through the roof which is the proper method. Use the reference hole as a landmark to transfer your measurements from the attic to the ceiling. If possible i d peek into the attic to make sure the vents are clear and working before cutting the hole and installing the vent.

These fans are commonly mounted in an upstairs stairwell or hallway ceiling where there s at least 3 ft. Options for venting a bathroom exhaust fan include best to worst. Where does the moisture go. Your bathroom exhaust fan blows directly into your attic.

Unfortunately we find far too many bath fans that exhaust the moist air into the attic. Every exhaust fan system should have a backdraft damper installed where the exhaust duct exits the roof or exterior wall. This might be a factory included damper or one installed by the technician. This damper is a metal piece that closes the exit making the fan a one way system.

No you cannot vent your bathroom exhaust fan into the attic. This also applies to dryer exhaust. Of clearance above the fan. Condensation is caused when warm moist air reaches its dew point.

Use a layout square or framing square to draw the. Rather than extracting the air out of your home you are simply moving it into another area of your home. This is inaccurate and can lead to severe problems in your home. As crazy as it sounds historically most homebuilders have installed that power bathroom exhaust fan in your second story bathroom failing to direct the warm moist air from your bathroom anywhere but in your attic.

When venting a bathroom exhaust fan make sure to vent the air to the outside rather than into your attic where it can cause mold and mildew to form. The science of creating the right atmosphere in your attic space did not really become a focus of homebuilders until the last 8 10 years. This sends hot air up and out cooling your house and your attic. Mark the ceiling back in the bathroom measure the inside dimensions of the vent fan s intake port to determine what size hole you need.

A powerful fan draws cooler early morning and evening air through open doors and windows and forces it up through the attic and out the roof vents. Putting warm summer room air into the attic will not cause condensation because the attic ventilation should vent the area. Most homeowners that have a bath fan don t give a thought to where the moist air from the bathroom is exhausted. Through the roof or an exterior gable wall.

Your attic is not a temperature controlled environment is never the same temperature as your living space and generally closer to the temperature outside.