Range Hood Into Attic

Range hoods shall discharge to the outdoors through a single wall duct.

Range hood into attic.

First remember that there is a lot of grease and moisture in that exhaust just think of how dirty that filter gets. Unlike ducted hoods ductless hoods don t remove heat and moisture they simply recirculate it back into your home. The number one disadvantage of a ductless range hood is that it is incapable of removing as many air contaminants as a range hood that vents outside. Ducts serving range hoods shall not terminate in an attic or crawl space or areas inside the building.

Although this isn t always possible in attic crawl spaces you should always insulate the duct to prevent condensation problems. This requires installing some ductwork. Insulate the duct in the attic. There are actually a lot of interesting questions there vern.

Range hoods m1503 1 general. If you are adding a new range hood over your stove and plan to vent it out through the roof you will need to get an adequately sized duct that will run all the way up through the ceiling into the attic and all the way up through the rooftop where it will be connected to your roof top vent. You can find 4 in. Duct already wrapped in insulation at home centers.

The duct serving the hood shall have a smooth interior surface shall be air tight and shall be equipped with a backdraft damper. Once you have it marked remove the hood and cut a hole in the wall or ceiling. Range hoods shall discharge to the outdoors through a single wall duct. The duct serving the hood shall have a smooth interior surface shall be air tight and shall be equipped with a backdraft damper ducts serving range hoods shall not terminate in an attic or crawl space or areas inside the building.

Your vent hood will have places available for either attic or wall exhaust. Ideally the range hood should be vented to the outside usually through the roof. It is definitely not a good idea to vent a range hood into the attic. The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.

Water condenses on the cold pipe and drips. Indoor air is exfiltrating through your range hood exhaust duct when the fan is not in use.