How To Vent Bathroom Exhaust Fan In Attic

Drill a reference hole draw a mark on the bathroom ceiling where you d like to install the vent fan.

How to vent bathroom exhaust fan in attic.

Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems. Options for venting a bathroom exhaust fan include best to worst. You should never exhaust the bathroom fan directly into the attic. Use an extra long 3 8 inch diameter spade bit to bore a reference hole through the ceiling and into the attic.

No you cannot vent your bathroom exhaust fan into the 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 manufacturer will give guidance on the total duct length permitted. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

In general you can try venting a bath vent fan down but the combination of down direction elbows and total run length may mean that it s ineffective. 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. For optimum performance locate it between.

Measure the vent fan. Duct already wrapped in insulation at home centers. You can find 4 in.