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New guy question.

Orooj
Orooj Member Posts: 1
in THE MAIN WALL
hello,
I am finsihing my basement and ready to install the suspended ceiling,the probelm I am facing relates with the ducts that protrudes from above.I am thinking of replacing the existing metal duct(6 " dia) with flexible duct to the register at one place,the other place is to remove an odd bend to gain some ceiling height(8" dia).Please advice.
Thanks
Orooj

Comments

  • Jon S.
    Jon S. Member Posts: 43
    New guy question.

    Hello. I’m a second year apprentice, and just getting into the heating side of plumbing. I hope none of you mind me posting random basic questions like this one.

    I’m looking at a system with two zones. One zone is a split loop with mono flow tees on the supply side of the baseboard, and regular tees on the return side. The other loop has just two pieces of baseboard on it. The first board has the mono flow on the supply side and the second board has a return mono flow on the return side. Why didn’t they use a supply mono flow on the supply side like the rest of them?

    Thanks,
    Jon
  • [Deleted User]
    [Deleted User] Posts: 0
    Good questions...

    There are actually three different types of tees used in these applications. There are MonoFlow tees as produced by Bell and Gossett and a few others, there are scoop diverter tees as produced by Taco and others, and there is a true venturi tee, that you can make yourself using a Nibco venturi insert fitting. The location of the tee is generally left up to the designer/installer with the manufacturer making the following recommendations. If the convector is above the main, the tee can be on either the inlet or the outlet. If the convector is below the main, it may require a diverter on both the inlet and the outlet tees. Remember, cold water doesn't like to rise, and hot water doesn't like to settle. It needs some "inducement".

    Whereas, hot water likes to rise (in the case where the convector is above the main) and cold water likes to settle, hence it need less "inducement".

    If you anticipate incurring a BIG pressure drop in the branch piping, like through a fan coil unit, or any other means of heat transfer, you may want to consider diverters on both the inlet and the outlet tees. In my case, I have a one pipe main that runs around the perimeter of my home. I have panel radiators, radiant floors, cast iron section radiators and a copper ceiling radiators, all being driven with double diverter venturi tees that I made myself. If works like a champ.

    In this case, you MUST size the down stream convectors for a lower entering water temperature, because when it is working correctly, at design condition, you will see a progresive drop in temperature as the water makes its way around the loop.

    Another little known fact, if you do decide to put a true MonoFLow tee into the system, and you install a non electric thermostat on the branch piping, the MonoFolw tee will produce a greater pressure drop when the is no flow through the branch piping than it will where there is flow through the branch piping.

    Welcome to the Wall. Stick around and you just might learn something you can use on a regular basis. Don't forget to support the Wall by purchasing some excellent reading materials from Mr. Holohan.

    ME
  • John Abbott
    John Abbott Member Posts: 358
    Welcome

    to the Wall its a great place to learn. Please don't hesitate to ask questions and remember " The only stupid question is the one you don't ask"
    By the way I am also a plumber if I can try to answer any plumbing questions you might have please e-mail me privately as plumbing is not an item of general interest on the Wall.

    John
  • Al Letellier
    Al Letellier Member Posts: 781
    Jon S.

    I too am a plumber and proud of it.I just love heat more.
    Welcome to the Wall and keep askin" away. I've been at it for 40+ years and am still learning too. This is a great place to learn, so keep asking!!!!
    As to the monoflow tee, they can push and pull and will usually work either way, so if it ain't broke, don't fix it.

    To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"
  • John Felciano
    John Felciano Member Posts: 411
    Welcom

    to the Wall,Jon.

    There are many of us here that do plumbing and heating and are glad to help in any way.Where are you from?

    It's nice to see some new young blood around this place.Stop in often there is much that can be learned here.I know I've gained a world on knowledge and it didn't cost me a dime.

    To Learn More About This Contractor, Click Here to Visit Their Ad in "Find A Contractor"
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