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New furnace installed, does this look right?

grantiman
grantiman Member Posts: 20
in Gas Heating

Had a new 96% gas furnace installed in my 30x30 single level home with 11 heat registers.. The heating company connected all 11 heat runs to a 16x20x5' plenum, I have 6 heat runs coming out the top, 4 on the side, and 1 out the back, is this installed right?

furnace duct 2.jpg

Comments

  • pecmsg
    pecmsg Member Posts: 6,178

    I need to see the Static Pressure #’s

  • grantiman
    grantiman Member Posts: 20

    Where would you find the static pressure numbers?

  • pecmsg
    pecmsg Member Posts: 6,178
    edited April 27

    Total External Static Pressure

    TESP

    Your contractor should know!

    MaxMercymattmia2
  • delcrossv
    delcrossv Member Posts: 2,182

    I dont see how that possibly could be balanced.

    Is it quiet?

    Is the heat even from room to room?

    Trying to squeeze the best out of a Weil-McLain JB-5 running a 1912 1 pipe system.
    SuperTech
  • mattmia2
    mattmia2 Member Posts: 13,074
    https://forum.heatinghelp.com/discussion/comment/1853752#Comment_1853752

    it certainly isn't a graduated system but if everything is sized right it should be possible to balance it with the balancing dampers.

    PeteA
  • Kaos
    Kaos Member Posts: 654

    Looks like a clean install. All hard pipe with sealed joints and no flex, much better than most.

    You have a home run type of setup, if most of those ducts just a couple of elbows and are sized for the correct flow, they work quite well. If the system was designed, there should be some drawing somewhere. If not, at static pressure measurement at the supply and return plenum would be good to confirm that the ducting is sufficient.

    There should be some way to balance, typically this is either dampers at the takeoff or dampers at the register boot.

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 17,986

    I would like to see the return ductwork but it looks like a decent job from what I can see. Not sloppy like most jobs.

  • MattinIndy
    MattinIndy Member Posts: 18

    That heat run coming off the end of the plenum is not a great idea. Typically you will get a ton of air on that run and it effects the others negatively. Is there a manual damper on that run that you could close?

    bburdHVACNUTSuperTech
  • hot_rod
    hot_rod Member Posts: 25,175

    Clean work, even the PVC joints are neat.

    Crawl space? Is it wet or humid down there?

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • HVACNUT
    HVACNUT Member Posts: 6,796

    It is a nice neat job. The supply duct is a Spider System. Short plenum, and multiple legs. The one off the end cap can cause issues. Everything is air sealed nice. Are those plastic supports considered "Fire Rated"? Is that DWV PVC? The female ends look pretty shallow for sch. 40.

    Has it been fired yet? What brand furnace? I don't think I've ever seen one with the gas valve tucked away on the side like that.

    A+++ for neatness.

    D- for design and execution.

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