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I assume as Long as you install a fire damper should not be an issue. Basically a mechanical louver that carries a two hour fire rating. A fuse link would close the damper at say 135 degrees keeping fire localized to a point.
You may need to supply more air to the system as well not certAin how the positive negative pressure system works. To get maximum flow you may need to relieve air
Posted from my iPhone/Mobile device
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