View Full Version : Gas furnace flue tied in to chimney
JIM MURPHY
06-07-2012, 01:58 PM
Older home, 1940 has gas furnace flue tied into the chimney on a separate flue. Another way of saying it is that the fireplace has a flue and the furnace has a flue both exiting the top of the chimney. Are there dangers here from CO2 leakage? Is this correct? If not how would you word it?
Jim
Bob Harper
06-07-2012, 03:42 PM
The furnace and fireplace must vent into separate flues that each are suitable for the class of service. The standard to make this determination according to the NFPA is a Level II inspection, which takes in the entire chimney as well as flues and attached appliance venting.
I'd worry more about CO than CO2.
JIM MURPHY
06-07-2012, 03:55 PM
Thanks Bob, that was the answer I was looking for. I meant CO.
Jim
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