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Thread: flex duct last 1-2 feet?
03-25-2008, 06:49 AM #27
03-25-2008, 07:21 PM #28Professional Member
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03-25-2008, 07:39 PM #29Professional Member
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- Mar 2008
misread thread sorry!
sorry guys, i thought the thread was about flex duct and not a flex duct connector. my bad
03-25-2008, 07:47 PM #30
03-25-2008, 07:49 PM #31
Flexible duct connector on page 7.
What is the difference between Air Ducts and Air Connectors?
UL (Underwriters Laboratories), in their 181 Standard for Factory-Made Air Ducts and Air Connectors, defines two categories of flexible "ducts".
The UL Listed Air Duct must pass all of the tests in the UL 181 Standard. Air Ducts are labeled with a square or rectangular shaped label showing their respective listing. There is no limitation on the length of runs when using UL Listed Air Ducts.
The UL Listed Air Connector must pass only a limited number of the UL 181 tests, and is labeled with a round shaped label, which states "for installation in lengths not over 14 feet".Merry Christmas
03-25-2008, 08:29 PM #32
Your inspectors most likely don't know there is a difference between a flex connector, and flex duct.
International Code limits flex connectors, not flex duct.
Point out to them that they are two different things, they may change their mind.(do it politely )
03-25-2008, 08:50 PM #33
03-25-2008, 08:55 PM #34
But your not the installer that has to face hiim again next week.
03-25-2008, 09:08 PM #35