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Opposed Blade Damper
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 16" Duct Opening (front blades parallel to shortest dimension)
3 hour fire resistance rating
Standard Features * 1/2" x 1/2" x 1/2" aluminum lattice return air grille * Surface mount grille with
*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches
Aluminum Airfoil Blade Double Deflection Diffuser 903-18X44 Damper:without Damper Opposed Blade DamperStandard Features Double deflection surface mount grille with adjustable airfoil blades Front blades parallel to longest dimension, back blades parallel to the shortest dimension Extruded aluminum surface mount frame with signature line marks Provides 4 way air flow on one plane Nylon bushings on adj. blades prevent metal on metal rattle Countersunk mounting holes with color matching Phillips Pozidriv screws Rust resistant pre coat with durable powder
