540/640 - Residential Supply Grille
540, 640Overview
The 540/640 Residential Supply Grille is available with a standard or split section parallel blade damper. The
front blades are individually adjustable for pattern direction control, while an integrated damper provides volume
control. The 540/640 is ideally suited for apartment, condominium, or residential applications.
Construction Options
- Material
- Steel (540/540S)
- Aluminum (640/640S)
- Damper Style
- Standard parallel blade (540/640)
- Split section, dual operator (540S/640S)
- Fastening
- Countersunk screw holes
- Lanced frame



