Accessories
611
Non-flanged horizontal mount exhaust backdraft damper
- Sizes available: 34"W x 34"H to 48"W x 48"H
- Galvanized Steel frame with aluminum blades
- Maximum free area velocity - 2250 fpm
- Optional motor pack available (411611)
- Use in roof curbs, duct work or wall collars when using a fan or power roof ventilator