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Thread: flex connectors

  1. #1
    Join Date
    Aug 2009
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    colorado
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    13

    flex connectors

    are canvas (flex connectors) required in the r/a drops of an rtu?

  2. #2
    Join Date
    May 2007
    Location
    Dry as a bone Tucson
    Posts
    4,541

    Flex connectors

    They are only "required" if specified. I use them only if the return is a trunk or plenum, not when the return is just a drop box.

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  3. #3
    I agree that they are not required by code, but by specification. But, it is good practice, especially in an RTU drop. It is a good idea to isolate any piece of equipment that has a rotating fan with a canvas connector to prevent vibration noise in the space.

  4. #4
    Join Date
    May 2007
    Location
    Dry as a bone Tucson
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    4,541
    Quote Originally Posted by Spanky McCranky View Post
    I agree that they are not required by code, but by specification. But, it is good practice, especially in an RTU drop. It is a good idea to isolate any piece of equipment that has a rotating fan with a canvas connector to prevent vibration noise in the space.
    More noise comes thru the curb RO than thru the duct. If the grid ceiling is not touching ductwork and the RO and curb is stuffed with insulation you will have a silent installation. But hey.......thats only what iv'e learned after installing a couple thousand of these things, ten tons and under.
    Some Talk, Some Do
    Energy efficient and economical to operate are not synonyms
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    Web
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