Deli or Bakery Exhaust Is Being Treated Like Ordinary Exhaust

Fast answer

Stop and identify what equipment the exhaust serves before installing ordinary duct, joints, sealant, supports, insulation, or access. A deli or bakery hood may serve grease-producing, heat, moisture, or other loads, and the approved system type controls the construction.

What to check

1. Match the hood and exhaust-fan tags to the current mechanical drawings.
2. Review the approved hood and fan submittals and the exhaust-system designation.
3. Check the specified duct material, joint method, access, support, enclosure, and test requirements.
4. Verify whether the equipment lineup changed after the drawings or fabrication release.

Do not

Do not assume every bakery hood is grease duct or every deli exhaust is ordinary galvanized duct.

Ask the foreman

“This deli exhaust is being staged as ordinary galvanized duct, but I checked the hood tag and equipment lineup and cannot confirm the approved exhaust classification. Can we verify the hood submittal and duct construction before this run is installed?”

Why it matters

Using the wrong duct system can create major fire/life-safety, inspection, access, cleaning, and replacement problems.