Leakage Class III

The SD35 is a UL555S Classified Leakage Class III smoke damper. It features:

  • UL555S Class III.
  • Rated to 2,000 fpm and 4″ w.g.
  • With factory furnished actuator, provides fail-safe operation (the damper automatically goes to the desired fail-safe position when fire interrupts power.)
  • Available with factory furnished sleeves.
  • Galvanized steel construction.

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