Smoke Damper SDRS25 - Class I, True Round

The SDRS25 is a UL555S Classified round smoke damper. It is Leakage Class I classified and features:

• UL555S Class I.
• Maximum rating of 4,000 fpm and 4" w.g. max 
• Extremely tight shut-off.
• Stops the leakage of smoke in static and dynamic smoke systems.
• Easy installation.
• Readily connects to round spiral or flexible ductwork.