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    FSD-311M

    Greenheck Product # FSD-311M
    Class I leakage rating with airfoil blades, pressure up to 4 in. wg (1 kPa), velocity to 3000 fpm (15.2 m/s) and temperature to 250°F (121°C).

    Certifications:

    • AMCA Air Performance
    • California State Fire Marshal (CSFM) Listing #3230-0981:0104 and #3225-0981:0103
    • CAN/ULC S112 Classified Fire Damper
    • CAN/ULC S112.1 Classified Smoke Damper
    • UL 555 (Listing #R13317)
    • UL 555S (Listing #R13317)