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  1. #1
    Join Date
    Feb 2006
    Posts
    511

    i'm no plumber... but this doesn't look right

    found this gem in a customers home today

    that's a power vent water heater ran through the original B vent

    at least whoever did it was smart enough to use high temp rtv on the single wall joints....

    is this up to code? much less legal?

    the worst part is that the water heater is literally 10 feet from an outside wall where it could have been vented properly
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  2. #2
    Join Date
    Jan 2009
    Posts
    44
    Nice !
    I came across a power vented W/H the other day, one of the 45 degree elbows was broken in half and the home owner duct taped it bake together.

    I need to get a digital camera

  3. #3
    Join Date
    Dec 2008
    Posts
    31
    that's nice. I would think it will eat threw the vent pipe in no time. Of course i'm not sure.. I've yet to see a 90% water heater with a condensate drain on it. But i'm not a plumber so i have not put many in. On a side note is that a pulse furnace to the left?

  4. #4
    Join Date
    Jun 2006
    Location
    New Jersey
    Posts
    4,337
    Quote Originally Posted by jonc View Post
    that's nice. I would think it will eat threw the vent pipe in no time. Of course i'm not sure.. I've yet to see a 90% water heater with a condensate drain on it. But i'm not a plumber so i have not put many in. On a side note is that a pulse furnace to the left?
    Im not a plumber either, most power vented water heaters are no where near 90% eff. The few that are do have drains on them. The whole venting standards for hot water heaters don't make sense to me. I just replaced my own water heater. Its eff is .63 and standard chimney vented. The power vented (PVC) version was .65.

  5. #5
    Join Date
    Mar 2007
    Location
    Madison, Wisconsin
    Posts
    2,260
    I have electric WH and with the price of gas....

    As for venting with B vent, I have seen it before too, but I don't see what could be wrong about it?
    I r the king of the world!...or at least I get to stand on the roof and look down on the rest of yall

  6. #6
    Join Date
    Feb 2006
    Posts
    511
    Quote Originally Posted by jonc View Post
    that's nice. I would think it will eat threw the vent pipe in no time. Of course i'm not sure.. I've yet to see a 90% water heater with a condensate drain on it. But i'm not a plumber so i have not put many in. On a side note is that a pulse furnace to the left?
    heck yeah, the mighty pulse

    hear it roar

  7. #7
    Join Date
    Jun 2003
    Location
    Chicago, IL
    Posts
    4,435
    Quote Originally Posted by jonc View Post
    I've yet to see a 90% water heater with a condensate drain on it.
    There are only a couple companies that make 90% condensing water heaters and they are expensive. The rest of them are just standard water heaters with an electronic ignition system and an inducer on top. The inducer has an opening which allows it to suck in cool air from the room to mix with the hot exhaust, allowing the use of PVC. The dry room air lowers the dewpoint of the exhaust, preventing any condensation in the piping.

  8. #8
    Join Date
    Dec 2008
    Posts
    31
    Quote Originally Posted by craig1 View Post
    There are only a couple companies that make 90% condensing water heaters and they are expensive. The rest of them are just standard water heaters with an electronic ignition system and an inducer on top. The inducer has an opening which allows it to suck in cool air from the room to mix with the hot exhaust, allowing the use of PVC. The dry room air lowers the dewpoint of the exhaust, preventing any condensation in the piping.

    Nice thanks for clearing that up... i was wondering how they got the temp low enough for the PVC vent but not condensate in the exhaust.

    Guess I need to read up on my water heaters

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