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  1. #1
    Join Date
    Mar 2013
    Location
    Toronto, Ontario. Canada
    Posts
    2

    Hi Efficiency Gas forced Air Furnace - Running exhaust pipes up exisiting stack

    Hello Everyone,

    Have a question to ask your help on:

    Can the PVC exhaust pipe for a new high efficiency furnace be run up the existing vent stack shared with a hot water heater?

    Your comments are welcome.

    Best,
    LaurieM

  2. #2
    Join Date
    Sep 2003
    Posts
    1,662
    In a word

    No

    If it is, turn off the furnace and the water heater at the gas shutoff valves
    and call a reputable contractor

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