back-drafting fumes from a water heater are transported to the living space above
Photo: Malcolm Whipkey
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Close it up

That register used to be a pathway for passive heat from the boiler to be transported to the living space above. Now, it's a way to transport the back-drafting water heater's gas fumes.

Malcolm Whipkey
1st Home Inspections, Inc.
Allison Park, Pa.

courtesy of the ASHI Reporter
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