90+ afue furnace venting

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Old 10-08-08, 07:01 PM
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90+ afue furnace venting

Is it OK to run a condensing furnace 3" pvc exhaust pipe up the existing flue using the 6 x 10 flue as a chase? The intake would come from another pipe vented to the outside front of the house. The contractors easy way is thru a brick wall then 25' across my garage out the back wall. I would rather not have two 3" pipes running along the wall then sticking out the back. I'm trying to come up with some other options.
 
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Old 10-08-08, 07:45 PM
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Is this old chimney being used for anything else? (water heater, or another furnace)

If nothing is being used, then you can use the old chimney as a chase, and they can cap off the top to support the PVC.
 
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