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Old 11-15-2009, 12:47 AM   #1
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Help Installing FireStopper in a Duct Chase

I put a firestopper on each floor, top and bottom of a chase for a rectangular duct.

However, due to the chase being an existing box, not a new one, it was not easy to put it in, and my cut of the sheet metal leaves some gaps with the rect duct and also with the wood header.

Another place, where the return rect duct touches the chase, so I can't insert a firestopper there.

Please tell me is it ok with the above case, or I have to do more to seal this.

(please excuse the other thread, where I typed a messed up title for the same question).
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