The SD102 smoke damper is UL555S Leakage Class II Classified. It:
- Stops the passage of smoke into the supply system by isolating fans in systems where pressure exceed 4" w.g.
- Has airfoil blades, which have greater strength, less static pressure, superior sealing, superior fire protection ability, and produce less noise.
- Rated for 2,000 fpm and 4" w.g.
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