Broan Model 505 is a quiet and efficient ventilation fan. It uses an 8" round duct.
Features:
- 180CFM 8.5 Sones.
- Installs easily between ceiling joists.
- Adjustable mounting brackets with keyhole slots span 14" to 24"
- Fits 8" round duct
- Permanently lubricated, thermally protected, plug-in motor
- Housing features built-in backdraft damper.
- Housing Dimension: 8-1/4" x 7"
- 11-1/2" square plastic grille