Floor Register 1550-R-18X20 Finish:Designer Color - Coffee Tan listed Fire-Resistance Diffuser * TVB

listed Fire-Resistance Diffuser * TVB - Thermal Vapor Blanket * Square Collar

904 Series Performance Data

Opposed Blade Damper standard on 4" widths

Standard Features * Return air T-Bar lay-in filter grille * Removable louvered 20 gauge steel face * 20" x 20"x 1" filter (not included) * 7/8" fiberglass back plenum cut holes 6"-16" (collar by others) * Seismic support holes * Soft White

Adjustable curved blade diffuser

Floor Register 1550-R-18X20 Finish:Designer Color - Coffee Tan listed Fire-Resistance Diffuser * TVBStandard Features Fixed bars with 0 deflection Heavy duty steel honeycomb construction Flush core and frame provides smooth surface Free area equals more than 75% of nominal size Blades run parallel to longest dimension Recessed screwdriver operated opposed blade damper to control air volume for positive balance of system Rust resistant pre coat with durable powder finish Driftwood Tan Options Reinforced welded core and extra supports for heavy duty