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  1. #14
    Join Date
    Mar 2013
    Location
    Billington Heights, NY
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    There is a contractor locator on here: www.hvac-talk.com/aop

  2. #15
    Join Date
    Jan 2004
    Location
    PA
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    75,659
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    Quote Originally Posted by kad2018 View Post
    I am not a house flipper. I am trying to get this done right so I can move into this house. Unfortunately, for a homeowner, like myself, it is very difficult to find the people who are willing to do the work the right way. I was pretty sure this was a lousy job, but I just wanted to see what others thought. I am trying to figure out how to fix this situation. I now realize that I should have just had a metal trunk line run down the length the house with flex ducts off of that. Anyone know an honest contractor in Houston area who will install round metal duct in a residence?

    Also, I read that a maximum of 4 supply ducts off a distribution box is the preferred way to install this type of duct system. Is this correct?
    Its a common practice. But not engraved in stone.
    Contractor locator map

    How-to-apply-for-Professional

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

  3. #16
    Join Date
    Nov 2004
    Location
    SW FL
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    8,458
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    Quote Originally Posted by kad2018 View Post

    I am trying to get this done right so I can move into this house.
    homeowner, like myself, it is very difficult to find the people who are willing to do the work the right way.

    I now realize that I should have just had a metal trunk line run down the length the house with flex ducts off of that.

    Also, I read that a maximum of 4 supply ducts off a distribution box is the preferred way to install this type of duct system.
    Is this correct? _ N O _
    _ _ NEVER EVER USE A ' DISTRIBUTION BOX '.

    That's WHY WYE's EXIST. !

    https://www.ductingsystems.com/nordf...-y+branch.html

    Figure 3 - Extended plenum __ https://www.rses.org/assets/servicea...al/630-148.pdf
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  4. Likes beshvac liked this post
  5. #17
    Join Date
    Mar 2018
    Posts
    22
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    Thread Starter
    Quote Originally Posted by dan sw fl View Post
    _ _ NEVER EVER USE A ' DISTRIBUTION BOX '.

    That's WHY WYE's EXIST. !

    https://www.ductingsystems.com/nordf...-y+branch.html

    Figure 3 - Extended plenum __ https://www.rses.org/assets/servicea...al/630-148.pdf
    The total length of my house is about 90 feet. Air handler is located about halfway between the 90 feet. Based on the article in the link you sent, I need to do a reducing plenum system or reducing trunk duct system. I am not sure which one is better or why. I understand that in the reducing plenum you reduce it in size when air flow drops to 50% and in the reducing trunk duct system you reduce after every fitting. What are the advantages/disadvantages of reducing plenum system vs reducing trunk duct system?

    Will I have problems with air flow at the end of the duct system if I only have a 3 or 4 ton system?

  6. #18
    Join Date
    Mar 2009
    Location
    Mount Holly, NC
    Posts
    7,250
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    It is all about CFM capacity, static capacity friction of materials chosen, and fittings used for the system
    It ALL adds up, and must be accounted for if the correct airflow is desired.
    The TRUE highest cost system is the system not installed properly...

    Find a HVAC-Talk Contractor by clicking here

    Do you go to a boat repairman with a sinking boat, and tell him to put in a bigger motor when he tells you to fix the holes?

    I am yourmrfixit

  7. Likes kdean1 liked this post
  8. #19
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    16,013
    Post Likes
    Quote Originally Posted by kad2018 View Post
    I am not a house flipper. I am trying to get this done right so I can move into this house. Unfortunately, for a homeowner, like myself, it is very difficult to find the people who are willing to do the work the right way. I was pretty sure this was a lousy job, but I just wanted to see what others thought. I am trying to figure out how to fix this situation. I now realize that I should have just had a metal trunk line run down the length the house with flex ducts off of that. Anyone know an honest contractor in Houston area who will install round metal duct in a residence?

    Also, I read that a maximum of 4 supply ducts off a distribution box is the preferred way to install this type of duct system. Is this correct?
    http://hvac-talk.com/vbb/forumdispla...Contractor-Map

  9. #20
    Join Date
    May 2008
    Location
    Missouri
    Posts
    4,368
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    We don't use any "duct board" as we've seen it simply fall apart in extreme temperatures and high humidity use. I'm sure the foil tape was probably NOT the correct type, but have seen way too many system fail, so stay away from duct board use.

  10. #21
    Join Date
    Nov 2006
    Location
    Athens, Ohio
    Posts
    5,339
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    Quote Originally Posted by wahoo View Post
    We don't use any "duct board" as we've seen it simply fall apart in extreme temperatures and high humidity use. I'm sure the foil tape was probably NOT the correct type, but have seen way too many system fail, so stay away from duct board use.
    I know there are detractors for ductboard.
    I've been using ductboard for 30 years. I can do sheet metal as well. Ductboard is tight and insulated when assembled, metal takes more steps.
    When ductboard is properly designed and sealed, it will last for 30-50 years.
    AOP Rules: Rules For Equipment Owners.

    Free online load calculator: http://www.loadcalc.net/


    There = not here. Their = possessive pronoun. They're = they are
    It's = contraction of it is. Its = the possessive form of it
    Too = also. To = expressing motion. Two = 2
    Then = after that, next. Than = indicates a comparison.
    Questions should end with a question mark "?" Statements end with a period "."

  11. #22
    Join Date
    Mar 2018
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    22
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    Thread Starter
    Met with the contractor today to talk to him about why he did what he did. He said it is fine, and I will not have any problems with air flow. That they would not have done it that way unless they thought it would work fine.

  12. #23
    Join Date
    Jun 2006
    Location
    Richmond, VA
    Posts
    4,138
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    sorry
    I wish I had a $1.00 for every response I deleted.....

    "Decidedly Superior in a twisted pathetic way".....

  13. #24
    Join Date
    Nov 2006
    Location
    Athens, Ohio
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    Quote Originally Posted by kad2018 View Post
    Met with the contractor today to talk to him about why he did what he did. He said it is fine, and I will not have any problems with air flow. That they would not have done it that way unless they thought it would work fine.
    I'll be the first to call BS.
    Tell him you want a measurement of static pressure and delivered air flow.
    AOP Rules: Rules For Equipment Owners.

    Free online load calculator: http://www.loadcalc.net/


    There = not here. Their = possessive pronoun. They're = they are
    It's = contraction of it is. Its = the possessive form of it
    Too = also. To = expressing motion. Two = 2
    Then = after that, next. Than = indicates a comparison.
    Questions should end with a question mark "?" Statements end with a period "."

  14. #25
    Join Date
    Mar 2018
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    22
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    Thread Starter
    Quote Originally Posted by kdean1 View Post
    I'll be the first to call BS.
    Tell him you want a measurement of static pressure and delivered air flow.
    He probably does not know how to do this or does not have the required equipment.

  15. #26
    Join Date
    Nov 2006
    Location
    Athens, Ohio
    Posts
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    Quote Originally Posted by kad2018 View Post
    He probably does not know how to do this or does not have the required equipment.
    Then he has no business in this business.
    A manometer with static pressure tips can be purchased for around $150. There's no excuse for work that bad.
    AOP Rules: Rules For Equipment Owners.

    Free online load calculator: http://www.loadcalc.net/


    There = not here. Their = possessive pronoun. They're = they are
    It's = contraction of it is. Its = the possessive form of it
    Too = also. To = expressing motion. Two = 2
    Then = after that, next. Than = indicates a comparison.
    Questions should end with a question mark "?" Statements end with a period "."

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