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Apprentice Q&A · #272

Why does smoke exhaust equipment need manufacturer clearance to combustibles?

4th YearSmoke Exhaust / Jet FansRED · Stop and Get Direction

Smoke/heat exhaust equipment must maintain the listed clearance around hot equipment. Hold the install and verify the nameplate/submittal before lowering, shifting, or coordinating removal of combustible material.

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Plain-English answer

Smoke evacuation equipment may operate in extreme heat during an emergency. If it is too close to combustible construction, that is not a normal “make it fit” problem.

Check the equipment nameplate, submittal, approved layout, and nearby materials. Hold the install if clearance is not met. Recovery may mean lowering/relocating the fan, revising supports, or having the GC move combustible framing outside the listed clearance.

Field checklist

Ask Foreman

The smoke exhaust fan at [location] is too close to combustible framing. I checked the nameplate/submittal clearance. Do you want the fan lowered/shifted or the framing moved before we continue?

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Verify before acting

Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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