1540/1540D — Insulated Step-Down Ceiling Diffuser
1540/1540D — Insulated Step-Down Ceiling Diffuser
- Provides high air volume delivery in a four-way air diffusion pattern.
- Four-cone design, fixed core, optional damper control access (damper ordered separately), and 2” high collar for easy flex connections.
- Molded fiberglass back meets or exceeds the following:
- ASTM E84 Flame and Smoke Test
- UL181 Erosion and Impact Test
- “R” Value of 6
- RR7811 Approval for Los Angeles
- Collar sizes available: 6", 8", 10", 12", 14".
- Model 1540D available with butterfly damper installed.
- Use with AL10PF plaster frame for surface-mount applications
- All steel construction. Formed steel back panel with molded fiberglass insulation cover.
- Bright White finish standard.
