Tornado Dampers - HTOD-330

Tornado dampers are designed to protect against rapid negative pressure changes caused by passing tornadoes. The HTOD-330 has a double-flanged frame with single thickness fabricated blades. Pressure suction with airflow - typically exhaust applications Pressure suction opposite airflow - typically intake applications Pressure: Up to 83 in. wg (20.7 kPa) Velocity: Up to 4000 fpm (20.3 m/s) Temperature: -40°F to 250°F (-40°C to 121°C) Pressure Rise or Decrease: 3 psi (20.7 kPa)