InstallationQuestion 48 of 110
A gas furnace flue must terminate where?
a.Inside the attic
b.Into an open crawl space
c.At an approved location outdoors with required clearances from openings
d.Into the return duct
Explanation
Flue and vent terminations must discharge outdoors at listed heights and clearances from windows, doors, and air intakes to prevent flue gases from re-entering the building. The CMC and appliance listing specify these termination requirements. Improper termination risks carbon monoxide entry.
Law Reference: 2022 California Mechanical Code (CMC)Practice all 110 questions free — no signup required.
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