1:5:10:365 EcoTip Blog

March 12, 2008

:072 Dryer Duct Length

fantech.jpg

credit: Fantech

Suggested Review – :071

Welcome to today’s 1:5:10:365 Tip for becoming a better steward for our home and planet.

1:5:10:072 Tip: Check the length and number of angles for your clothes dryer’s ductwork. Ducts that are too long or have too many angles will slow drying and waste energy.

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Additional Information

The International Mechanical Code article 504.6 stipulates the requirements for Domestic clothes dryer ducts. In brief, the maximum length of duct permitted is 25 ft. This maximum length should be reduced by 2.5 ft for each 45-degree bend and 5 ft. for each 90-degree bend. The duct should be a minimum nominal size of 4 inches in diameter and shall have a smooth interior finish.

When a short dryer duct length is not possible, the “Advanced Dryer Booster Fan” by Fantech can assist in over coming the resistance by ensuring that moist air exhausts quickly. This reduces drying time and energy costs. The manufacture says their fan is suitable for duct runs of up to 60 linear feet of rigid duct with up to six elbows. 

www.fantech.net.

http://www.fantech.net/dryer_boosting.htm

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