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  • High efficiency vent

    My next door neighbor had a high efficieny boiler installed and the installer ran the vent (plastic) outside right near a corner (inside corner) of the house and attached garage. In winter, the exhaust forms ice all the way up to the roof line. Needless to say, this presents paint peeling problems etc. My question is: Can the vent be extended up to the roof line? If yes, any special requirements? TIA

    Jim

  • #2
    Depending on the unit. If you don't exceed five 90 degree elbows you should have no problem. I for one in the NYC area have never seen your problem. It must get alful cold there. Good Ruck!

    Comment


    • #3
      1 st the pipes should not be put in a corner . the pipes need to be away from windows ,doors ,intake vents and a overhang or corner .they need to have air flow to pull the fumes away.

      the pipe needs to be away from house about 18" .

      what kind of fitting is on the end OK pipe ,a tee?

      how far off the ground is the pipe?

      i will look at a book tomorrow and give you some more info.

      you do not want to run this pipe to far out side ,the hot air will condensation will freeze up the pipe [ not good ]
      Charlie

      My seek the peek fundraiser page
      http://observatory.mountwashington.o...nal&fr_id=1040


      http://www.mountwashington.org/weather/conditions.php

      new work pictures 12/09
      http://public.fotki.com/hvachawk/

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      • #4
        Robert and Hawk, Thanks for the responses. Robert--I don't know if it gets awful cold here, but I have seen it hit 50 below!! Right now the pipe sticks straight out with a 45 on the end. (turned down) Hawk--The pipe is about 18 to 24 inches above the ground--45 0n the end--sticks out about 16 inches. Not much choice in where the pipe comes out of the house-move away from the corner (it is about three feet from the corner) and it is under a window. I was concerned about condensation freeze-up, that's why I am asking the questions. If the line was extended to the roof line, it would have to go up about 8 feet. Any more thoughts are appreciated.Oh, by the way, Robert, right now there is one 90 degree elbow at the boiler and the 45 at the end of the pipe.

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        • #5
          the pipe under a window is a no no

          i had a long day to day and did not have time to look up the info.

          I will get back tomorrow .
          Charlie

          My seek the peek fundraiser page
          http://observatory.mountwashington.o...nal&fr_id=1040


          http://www.mountwashington.org/weather/conditions.php

          new work pictures 12/09
          http://public.fotki.com/hvachawk/

          Comment


          • #6
            Why not use a picture- much easier to explain.

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            • #7
              Originally posted by sluggo85024
              Why not use a picture- much easier to explain.
              A thousand words??

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              • #8
                UPDATE: The neighbor moved--sold it to a general contractor. I told him of the problem and he is going to have his HVAC man take care of it. Thanks for the help.

                Jim

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                • #9
                  Yes you can run up to roof line but must build box around pipe. If it's cold enough to freeze on house, think about the inside of a 10' to 30' pvc pipe. It will freez up. I've seen only 18" freez close. Good luck

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