Long-turn 90 for dryer venting

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Old 10-23-06, 08:01 AM
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Long-turn 90 for dryer venting

Has anyone seen or heard of this product. Does anyone have any comments or suggestions. I was trying to get some feedback from the field on the products ability to be more effecient and save the contractor 5 feet of duct run, versus the bulkiness and expense of the unit. www.dryer-ell.com
 
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Old 10-23-06, 09:13 AM
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This is not saving you from running 5 more feet! The friction that you will save will be equivalent of 5 feet. If this is not a long run Id save your money.
 
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Old 10-23-06, 09:49 AM
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Originally Posted by airman.1994
This is not saving you from running 5 more feet! The friction that you will save will be equivalent of 5 feet. If this is not a long run Id save your money.
most codes indicate a total run of dryer exhaust conduit of 25 feet less 5 feet for every elbow. based on ASHREA handbook, the long turn elbow when calculated equals the friction loss found in straight pipe.

When UL did thier fact finding test on the long turn ell and compared it to the current or typical ell, the findings were surprising. the friction loss in the typical ell equalled 15 feet of straight pipe, and the long turn ell equalled only 2.5 feet. the long turn ell measures 18 inches long.

in the 2006 IRC (residential code), it allows the use of long turn ells, and its respective ashrea calculations.

For contractors whom have thier hands tied with length of run issues, the ell seems to provide a cost effective alternative to a booster fan.
 
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Old 10-23-06, 04:15 PM
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Wink

rickharp You dont say how long the vent run will be so its hard to say if it will save anything at all. If you look or check all blowpipe work that are put in have are use long sweep 90oL on them.

ED
 
 

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