STXB, STXB-RHUL, and STXB-HP Accessories

Non-flanged horizontal mount exhaust backdraft damper

• Sizes available: 8"W x 8"H to 30"W x 30"H
• Galvanized Steel frame with aluminum blades
• Maximum free area velocity - 2000 fpm
• Optional motor pack available (411611)
• Use in roof curbs, duct work or wall collars when using a fan or power roof ventilator
• 411 auto exhaust damper is part of the S&P Ventilation Systems Quickship program and ship out in 3 days

• 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

• Easy motor pairing and performance control
• Set just 4 parameters to get your fan started
• Equipped with the latest energy-saving features
• Dual safe torque off (STO)