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" Spiral pipe diameter must be 4” larger than width of grille
Nylon bushings on adjustable blades prevent metal on metal rattle
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 14" Duct Opening(front blades parallel to shortest dimension)
with 75% free area Options 14 GA 304 SS Construction 12 GA (
Lever operated Multi-Shutter Damper
2" Vertical Mount Fire Damper 2501-48X34 Accessories " Spiral pipe diameter musth3. Standard Features * 2501 Square or rectangular for vertical mount only. Maximum dimension 48w, 49h. * 2502 Square or rectangular spring actuated (6) for horizontal or vertical mount. Maximum dimension 41w, 36h. * UL and California State Fire Marshall approved * 2" thinline frame * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G 90) * Self
US$ 16.99
US$ 15.99
US$ 15.99
