iO HVAC Controls BN Series Round Barometric Backdraft Damper (SD)

The iO HVAC Controls BN Series barometric backdraft damper allows air to flow in one direction while automatically preventing unwanted backdraft, supporting balanced, efficient ventilation. Built for residential and light-commercial HVAC systems, this passive barometric damper helps maintain healthy airflow and consistent indoor comfort.

Why Choose the BN Series

• One-way airflow — automatically prevents unwanted backdraft for balanced ventilation.
• Passive and maintenance-free — barometric operation with no wiring or power required.
• Built to last — durable galvanized-steel housing for quiet, dependable performance season after season.

Specifications

• Actuator Type: Barometric
• Max Static Pressure: 0.5" WC
• Blade Design: Single-Blade
• Compatible Panels: Standalone (barometric)

Ideal For

Residential and light-commercial ventilation systems that need reliable one-way airflow and backdraft prevention.