April 26, 2007
What should an outdoor combustion air duct be made from?
What should an outdoor combustion air duct be made from?
Expert
Maestro
The duct supplying outside combustion air should be noncombustible in most jurisdictions.
If you can see the duct, check what material it is made from. If it is a combustible material, the implication is a fire hazard. We recommend further investigation.
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