Air Distribution · Plenums
Ceiling return plenum chamber
Plenum box assembly — Above ceiling zone
ConnectionMultiple grille openings
SupportBuilding/duct enclosure
How to install it
- 1
Define plenum boundaries
- 2
seal penetrations
- 3
install return grilles
- 4
maintain code-compliant materials and pathways.
Quality check
- No uncontrolled leakage, access maintained, prohibited materials absent
Stop and verify
Stop if ceiling plenum code requirements are unclear