Quote:
Originally Posted by Tightwadmo
When was this required? I have original vent in my garage close to furnace. It has no automatic door or door at all just large tube duct sticking up above the attic insulation.
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It's complicated. Here is a home inspection article that addresses duct openings in the garage ceiling, and refers to the 2006 International Residential Code. Basically, the garage ceiling should be constructed to not allow a fire in the garage to spread into the attic, which could allow it to spread into the living area.
Attached Garage Fire Containment - InterNACHI(R)