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8 inch vent in 2 x 12 rim joist?

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1 hour ago, Michael Brown said:

We have a high cathedral ceiling with one in the center and one on main floor in hallway. They are wired together.

Cooking on little back burners is fine but the front sets it off all time.

Keep the fire alarms away from the kitchen. In a cathedral ceiling keep it at least 4 inches away from the top but no lower than the point where the two ceiling surfaces are 6 feet apart.

Edited by Marc
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Thanks for the tips!

The top detector is about 2 inches off top and we only have about 2 ft. of flat ceiling down the center. Makes sense it gets concentrated in the center rather than spread out on a flat ceiling.

I think one of the alarms is the ionization style also.

Worked okay until we got the gas stove.


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