Boot to Diffuser Connection

Should there be balancing damper? How should boot-to-diffuser connection be sealed?

I'm checking boot to diffuser connection at [location]. I found metal box in ceiling connecting duct to diffuser faceplate. Should there be balancing damper? How should boot-to-diffuser connection be sealed?

Flex Duct, Boots, Collars & Grilles 1st Year YELLOW

Stop if

Hold point on boot to diffuser connection: 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 connect flex directly to diffuser without boot. Don't leave gaps. Don't skip balancing damper if shown on drawing.

Check

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

Say this to your foreman

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