The SD-1250 Series Smoke Dampers meet specifications requiring a Class I leakage rating at 250°F. The SD-1600 Series Smoke Dampers meet specifications requiring a Class I or Class II leakage-rating at 250°F or 350°F. SD-1250 and SD-1600 Series smoke dampers are tested according to UL Standard 555S for dampers that are used in Heating, Ventilating, and Air Conditioning (HVAC) smoke systems.
SD-1250 Series smoke dampers meet the requirements for the International Building Codes (IBC). Each SD-1250 Series smoke damper includes factory-installed actuator(s) as per UL Testing. Smoke dampers up to maximum tested sizes are rated for either vertical or horizontal mounting.