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listed Fire-Resistance Diffusers * TVB - Thermal Vapor Blanket * Square collar
Designer Color or Plated Metal Finish available on this product
Recessed screwdriver operated opposed blade damper to control air volume for positive balance of system
Options (must specify when ordering)
Standard Features * Fixed bar blades parallel to 1st dimension given *
Backdraft Vertical Mount 3550-26X12 T-Bar listed Fire-Resistance Diffusers * TVBh3. Standard Features * 3550 Vertical mount * 3560 Horizontal mount air up * 3570 Horizontal mount air down * 3580 Round sizes available 5" to 24" * All non motorized backdraft dampers * Dampers are opened by air pressure differential and closed by gravity * 16 gauge channel frame with 26 gauge galvanized blades * Out of airstream linkage * Blades are vee stiffened 26 gauge for strength and stability * Square steel pivot pins * Nylon bushings * Single
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