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904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 24" Duct Opening (front blades parallel to shortest dimension)
Allows for 2-way airflow adjustment
Ceiling opening must be 4” larger in length and width than the nominal duct size
Blades are parallel to the shortest dimension
Countersunk mounting holes for flush appearance with stainless sheet metal screws
4" Horizontal/Vertical Mount Fire Damper 2634-40X6 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
US$ 20.99
US$ 44.00
US$ 1649.50
