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For damper free area chart B click here * 2665 - Round fire door for vertical mount only
blades prevent metal on metal rattle Countersunk mounting holes with color matching Phillips Pozidriv screws Rust-resistant pre-coat with durable powder finish Soft White Options Screwdriver operated Opposed Blade Damper 2" ADC compliant square to round collar with a bead for ease of installation Heavy Duty Construction MRI Compatible Insect Screen Fractional
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 16" duct Opening (front blades parallel to shortest dimension)
18" or 24" lengths * Soft White Options * Standard Color or Designer Color Finish available on this product
Standard Features * 3-way diffusion for draft-free heat or air conditioning * For ceiling or sidewall applications * All component parts
Parallel Blade Volume Damper 3000P-14X16 T-Bar For damper free area charth3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3. Options * 3000 PLL Low Leak Air Control
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