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Trace Fire Group

A Running Fan Is Not a Working System: What a Smoke Control Test Found in a Stair Pressurization System

Smoke control is the one life safety system whose failure stays hidden until the day you need it. You cannot hear it fail. A basic function check can confirm the fan turns on and the alarm trips, and the building can still be wide open to the problem we are about to describe. The only way to know the stair is actually being protected is to test the system as an engineered whole.

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