Ductwork in Laboratories with Fume Hoods

For this fume hood exhaust, what material, velocity, and joint requirements does the design specify?

I'm checking ductwork in laboratories with fume hoods at [location]. I found ductwork connected to laboratory fume hoods for hazardous chemical exhaust. For this fume hood exhaust, what material, velocity, and joint requirements does the design specify?

Stop if

• Hold point on ductwork in laboratories with fume hoods: I have the location, photo, drawing/detail, and what was checked. Who should verify before this gets cut, covered, lifted, sealed, energized, or signed off?

Watch out

• Don't use standard materials for fume hood exhaust. Don't ignore face velocity requirements.

Check

• room/grid/area
• photo of condition
• drawing/detail
• manufacturer/model if visible
• what I already checked

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