4 1/4" Vertical Mount Fire Damper 2633-36X28 Smoke-Fire Damper 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 18" Duct Opening (front blades parallel to shortest dimension)

Options * Sleeve variations * 304 stainless steel construction * Fractional and odd sizes available h3

Front blades parallel to shortest dimension

Please contact us for a quote on optional Stainless Steel Construction or Fractional Sizes

4 1/4" Vertical Mount Fire Damper 2633-36X28 Smoke-Fire Damper 904 - Double Deflection Adjustableh3. Standard Features * 2633 Square or rectangular out of airstream fire damper for vertical mount only. * 2634 Square or rectangular Spring actuated (6) out of airstream fire damper for horizontal or vertical mount. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * Maximum dimension 60w, 52h * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion