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- FIRE DAMPER(FL/EL Type) FIRE DAMPER(FL/EL Type)FIRE DAMPER is operated by heat when fire breaking. Fire Damper is constructed by UL555 as determined ANSI/NEPA 90A and ANSI/NEPA 803.
- SMOKE DAMPER SMOKE DAMPERSMOKE DAMPER is usually operated by smoke detector as well as heat when fire breaking. Smoke Damper is constructed by UL555S as determined ANSI/NEPA 90A and ANSI/NEPA 803.