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  1. #1
    Join Date
    Nov 2004
    Location
    KY
    Posts
    4

    Lightbulb

    I have recently inquired about getting new adequate ductwork when i have my new furnace/ac unit installed. I was told by the installer that all the duct will be the flexible type. I've put the project on hold until i hear from youall on the mtn top. Does this sound right???I thought it could only be used in certain instances and lengths. What do the experts think????

  2. #2
    Join Date
    Jul 2002
    Location
    Zelienople, Pa
    Posts
    2,965
    It'll be fine as long as its designed by Manual D.
    How tall are you Private???!!!!

  3. #3
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Flex will be fine,IF ,sized and installed properly,which is often ,Not the case.

    Ask if they are using ManJ and Man. D??


    Why are they suggesting replacing all the duct??What is not adequate??

  4. #4
    Join Date
    Feb 2003
    Location
    South Carolina
    Posts
    1,333
    nothing wrong with flex if straped up and seald good
    does need to be sized right man d or j

  5. #5
    Join Date
    Dec 2002
    Location
    peoples republic of maryland
    Posts
    956
    Depends on the application as well. Is it in a crawl space? if so the mice (all homes get em) will eat holes in them and make nests. This will obviously cause a serious leakage as well.
    "The meek shall inherit the earth"
    "he that's walking with wise persons will become wise, but he that is having dealings with the stupid ones will fare badly" Proverbs 13:20
    "Pressure is something people feel when they don't know what their doing". Peyton Manning-superbowl MVP

  6. #6
    Join Date
    Sep 2004
    Posts
    3,157
    The company I work for does nothing but residential installations and thats all they use

  7. #7
    Join Date
    May 2004
    Location
    Toronto
    Posts
    276
    I think the least amount of flex is best, origanly you use to see it to make the connection from the run to the difuser and a max of three feet. As with everything that comes alon to make ones life easier someone has to abuse it.

    If the contractor wants to use flex send him away and get someone that can fab up duct. This would mean getting a reputable shop.

    coolestacman

  8. #8
    Join Date
    Dec 2002
    Location
    peoples republic of maryland
    Posts
    956
    Originally posted by coolestacman


    If the contractor wants to use flex send him away and get someone that can fab up duct. This would mean getting a reputable shop.

    coolestacman

    Be prepared for higher prices, quality ain't cheap.
    "The meek shall inherit the earth"
    "he that's walking with wise persons will become wise, but he that is having dealings with the stupid ones will fare badly" Proverbs 13:20
    "Pressure is something people feel when they don't know what their doing". Peyton Manning-superbowl MVP

  9. #9
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    true tinknockers are becoming a thing of the past in the resadential market. flex is fine as long as it is in your attic. if you main trunk is under the house in a crawl or basement should be all medal. and insulatated in all crawl spaces.

  10. #10
    Join Date
    Dec 2003
    Location
    Location!, Location!
    Posts
    929
    "Depends on the application as well. Is it in a crawl space? if so the mice (all homes get em) will eat holes in them and make nests. This will obviously cause a serious leakage as well."
    __________________

    See if you can get clear flex for the "habitrail" effect, then.

  11. #11
    Join Date
    Feb 2004
    Location
    chicago suburbs
    Posts
    4,422
    all flex would never pass code by me. you're an ironworker......put some iron in. keep the flex down to a minimum.
    FILL OUT YOUR PROFILE!!

  12. #12
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,760
    We prefer to run duct board trunk, then flex to the grilles, but if sized right nothing wrong with flex trunk.

    Of course, sheet metal sized wrong is no better then flex sized wrong.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  13. #13
    Join Date
    Mar 2002
    Location
    Concord, CA
    Posts
    2,633
    Originally posted by coolestacman
    If the contractor wants to use flex send him away and get someone that can fab up duct. This would mean getting a reputable shop.
    Uh huh.

    You might consider sending all union shops away too judgetc. A reputable shop has quality employees who are hired and paid on merit - not protected by irrelevant measures such as length of time served, how loud they can yell the word “scab” or what union boss they've sucked up to.

    Yeah. I know. Such an analysis is absurd. But it's no more absurd than assuming that sheet metal is the only viable duct solution and that any shop using flex is therefore not reputable.

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