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Old 03-14-2014, 10:33 PM   #1
jw1
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Combined venting


I currently have a furnace running off natural gas which vents through the roof using PVC. Would it be possible to join a condensing tankless water heater which vents with PVC down stream about 10-15 ft and use a common exhaust.
I would rather have one exhaust vent running through the roof than two.
Both are power vented I believe.
Thanks!

The tankless is 199,000 BTU, not sure about the furnace.

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Old 03-14-2014, 10:58 PM   #2
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Combined venting


Most can be run out a wall.
I would not connect the vents.

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Old 03-15-2014, 12:51 AM   #3
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Combined venting


No, you cannot.
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Old 03-15-2014, 02:17 AM   #4
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Combined venting


Thanks!!!

Don't want to void the warranty either
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