How Long Can Dryer Vent Duct Be

In addition if there is a 45 degree bend then deduct 2 5 feet from the recommended length and if there is a 90 degree bend deduct 5 feet.

How long can dryer vent duct be.

I had to modify the length of the dryer vent pipe and was stunned when i took it apart. Male to female connections for use on wall vent duct. Allows for only 2 clearance between dryer and wall. It mounts in line with a 4 inch vent in the attic.

Flexible dryer vent hoses are usually much longer than you need. Exhaust systems longer than the manufacturer s recommendations can extend drying times affect appliance operation and may encourage lint build up on pipe lining. Most slim ducts can be adjusted from about 27 inches to about 48 inches in length. When the duct has a long way to go from the dryer to the exterior wall a booster fan is actually a good idea.

More dryer vent cleaning information can be found here. Another option which can be helpful for dryer vents that run vertically through a roof which seem to clog more often than horizontal vents is the addition of a dryer booster fan like the fantech dbf 110 shown below. For example a dryer with a 90 degree elbow at the exhaust port and another at the top of the basement wall can run a maximum of 15 ft. Use no more than 25 ft.

Female to male connections for use on dryer vent outlet. Keep exhaust duct as straight and short as possible. For every 90 degree turn and 2 1 2 feet for every 45 degree turn for dryer vent installation. If your dryer vent is more than 25 feet long twisting and turning on its way to the exhaust vent contact a dryer vent wizard near you.

It can help improve the flow of the air so that it doesn t get bogged down and. It allows you to push the dryer very close to the wall. So if you have a space that will need two 90 degree bends then you should have no more than 15 of dryer duct. This can be a great space saver as long as the dryer and the vent are close together.

Dryer manufacturers recommendations supersede this so if you have to make a longer run read the owner s manual. They state that a straight duct be no longer than 25 feet. The entire 25 feet of the vent pipe from the old dryer location to the exterior vent hood was choked with lint. Extends to 18 elbow turns 90 within 4 of wall.

Available in 10 and 20 foot lengths. It has a wide rectangular shape except for the two ends where it connects to the dryer and the vent outlet. Great site dealing in all aspects of vent maintenance cleaning and solutions. Duct and subtract 5 ft.