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why would a vent pipe leaving my water heater connect to my furnace?

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Just found a badly corroded and broken pipe between my water heater and my furnace. Do they share venting?
asked in Gas Water Heater by cwfacesetc (120 points)
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1 Answer

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Hi Cwfacesetc,

 

Certain types of fossil fuel burning appliances can share the same vent pipe; it is a very common type of installation. However, there are several important rules that must be followed while configuring such venting system and you can find all that information in “HVAC” category after returning to my website.
 
You may want to start from this article: Furnace – water heater venting 
 
If you have some specific questions about your installation, please provide detailed information about your chimney (material, interior / partially exposed), brand and model of your appliances, their BTU's (should be listed on their nameplates), distance between the appliances and the chimney.
 
Just click "comment" below.
answered by darekrudy (21,730 points)
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