Circle cutout size for Duravent ceiling support

[BethelStrong]

How many inches should my drywall/plaster ceiling hole be for my Duravent ceiling support be? I cut a hole 12 3/8 inch but that puts the “decorator ceiling support” very near the drywall. My framing is about 14x14 but my ceiling support round is cut to barely let it pass through. Is that too close?

I had a wide open fire going to test the heat, and the ceiling support is around 100 degrees currently. The stovetop is over 600.

I realize there is room because of the circle trim piece, but what is correct?


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[bholler]

How many inches should my drywall/plaster ceiling hole be for my Duravent ceiling support be? I cut a hole 12 3/8 inch but that puts the “decorator ceiling support” very near the drywall. My framing is about 14x14 but my ceiling support round is cut to barely let it pass through. Is that too close?

I had a wide open fire going to test the heat, and the ceiling support is around 100 degrees currently. The stovetop is over 600.

I realize there is room because of the circle trim piece, but what is correct?


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Combustibles can be against the outside of the support box

 

[BethelStrong]

They can, not can’t, right?[emoji2957]

Thanks bro.


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[bholler]

They can, not can’t, right?[emoji2957]

Thanks bro.


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What do the instructions say?

 

[BethelStrong]

Confusing. “All other framing” 14x14 but as to the hole, it seems to say 12 3/8ths which is what I did, which is about the size of the circular ceiling support without the trim collar. The images show the pipe must be 2 inches from framing or combustibles (and it is), but the knee bone is connected to the leg bone so I got to worrying about that drywall/plaster being up near the box.

Thanks again.


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