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For damper free area chart A click here * 2563 - Out-of-Airstream fire door
inner dimension and outer dimension sizes available * Tamper proof screws * Standard Color
700 CB40 - four way * 6x6 thru 20x20 diffuser sizes * Square to round No Labor Collar * 2x2 galvaneal steel panel with seismic support holes * Soft White Options * 700 CB40 0 - opposed blade damper * 700CB FR - U
Maximum dimension 48w
904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 10" Duct Opening (front blades parallel to shortest dimension)
True Round Fire Damper 2652-7 Accessories For damper free area charth3. Standard Features * Round 1 1 2 hour fire damper * Horizontal or Vertical installation * UL and California State Fire Marshall approved * Damper construction meets NFPA 90A requirements * Stainless steel curtain * 16 gauge steel frame * UL listed fusible link, 165 standard * All sizes utilize one main curtain stay * Galvanized finish h3. Options * MAR Mounting Angle Ring (sold in pairs 2 needed, 1 for each end)
