SECTION 233313- DAMPERS

GRAVITY OPERATED OR ACTUATOR OPERATED BACKDRAFT DAMPERS. GENERAL. SECTION INCLUDES. Extruded aluminum, light to medium duty, backdraft dampers suitable for application in HVAC systems with velocities to 1,500 feet per minute (7.6 m/s). RELATED SECTIONS. Section 233100 – HVAC Duct and Casing (Previously 15810) ................
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