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Venting old furnace without original chimney

1K views 1 reply 2 participants last post by  COLDIRON 
#1 ·
The chimney on my house is brick lined with a rectaguar clay flue. It is in poor condition. I am wondering if I could take the chiney down below the roof and fabricate a steel box then flash and shingle that in. The furnace is old forced air. The pilot is auto light so not super old, and the water heater is vented through the chimney as well.
 
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