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listed Fire-Resistance Diffuser * TVB - Thermal Vapor Blanket * Square collar
Blades are parallel to the shortest dimension
Standard Features * 2533 - Square or rectangular for vertical mount only
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
Directional volume diffuser with 4-way removable core
Pressure Relief Vertical Mount 3510-12X6 Commercial listed Fire-Resistance Diffuser * TVBh3. Standard Features * 3510 Vertical mount * 3520 Horizontal mount air up * 3530 Horizontal mount air down * Designed to open with negative or positive pressures for intake or exhaust air * Felt edge blades to hold noise to a minimum * Aluminum construction * Blade to blade linkage * 1 4" pivot pins in nylon busings * Maximum size 24 x 24 * Mill finish h3. Options * Sleeve variations * Mounting flange * Adjustable counter balance to adjust various
