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  • venting 2 water heaters

    I am building a house for my daughter and her husband and to save some money I'm doing pretty much everything. My question is I need to vent two gas water heaters (50 gallons each My son-in-law was adamant about having two.)Each vent is 3" and I would like to vent both to a common vent but I'm not sure what size the common vent should be. I will be venting through the roof.

  • #2
    Re: venting 2 water heaters

    50 gallon heaters are probably 40,000 btu's each. as long as they are on the same floor level in the same utility closet, we can share a common 4'' vent.

    check with your local building department to verify the info.

    rick.
    phoebe it is

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    • #3
      Re: venting 2 water heaters

      The water heaters are side by side in the same room. Thanks for the help.

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      • #4
        Re: 2 water heaters is very wasteful

        Ask him why TWO?
        Better to have one working harder.
        Why such waste?
        I'd take an educated guess - but I'm unqualified.
        It ain't just soot, it's paydirt.
        "I swear, wherever Gift goes, argument follows." -Youtube comment

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        • #5
          Re: 2 water heaters is very wasteful

          Originally posted by Robert Gift View Post
          Ask him why TWO?
          Better to have one working harder.
          Why such waste?
          My question exactly. Why waste so much space and money. You can just get a Larger WH (75 gal) more than enough or get a tankless and add a re circ line. I mean what does hope to accomplish by having two WH. He should do some research first or consult with a License plumber.
          Wise man said "Hot on the left, cold on the right,
          crap flows downhill, and checks come on Friday"

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          • #6
            Re: 2 water heaters is very wasteful

            Why only Two ? I usually put in Three !
            I can build anything You want , if you draw a picture of it , on the back of a big enough check .

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