Series 20 Smoke Dampers Class ISeries 20 Smoke Dampers Class I Click here for Submittal UL Classified UL 555S Meets NFPA Standard 90A ICC Building Codes Specifications: 120 Volts 24 Volts Leakage Classes Class 1 Ultra Low Class 2 Low Material Galvanized Steel Temperature Ratings 250 Rated Standard 350 Rated Optional Orientation Available for Vertical or Horizontal Installations 22Ga Optional Sleeves 17 Sleeve Standard 20 or 24 Lengths Optional Sizes Available in Single Section
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