Equipment & Flex · Equipment & Terminals
Roof curb duct connection
Rectangular/round — Rooftop unit
ConnectionCurb adapter/flanged joint
SupportStructure/curb framing as designed
How to install it
- 1
Verify curb openings and supply/return orientation
- 2
install duct before unit when required
- 3
support from structure, not unit base
- 4
seal curb transitions
- 5
protect roofing
- 6
set unit without crushing duct.
Quality check
- Openings aligned
- no cross-connection
- weather seal complete
- service clearances preserved
Stop and verify
Stop if curb/unit model or opening dimensions mismatch