Fire Dampers > Combination Fire/Smoke Dampers - Class I and Class II AirFoil

Combination Fire/Smoke Dampers - Class I and Class II AirFoil Blade Models

Combination fire/smoke dampers are used to prevent the passage of both fire and smoke, to be installed at locations that are designated as both fire barriers and smoke barriers.  Combination dampers comply with both the Standard for Fire Dampers, UL555 and the Standard for Smoke Dampers, UL555S.  All models of Air Specialties Express combination fire/smoke dampers are UL, ULC and State of California Fire Marshall listed.

Combination fire/smoke dampers are available with a Class I or Class II leakage rating.  ASX Class I EF series dampers provide a maximum leakage of 8 cfm per square foot at 4.0 inches static pressure.  ASX Class II EG series dampers provide a maximum leakage of 20 cfm per square foot at 4.0 inches static pressure.

ASX combination fire/smoke dampers are provided with a damper sleeve or optional side plate.  Numerous accessories are available with combination dampers, including retaining angles, transitions, smoke detectors, remote control boxes, micro switch packages and STO/R or DTO/R (single and double thermostat override).  Fire/smoke dampers are available with electric (120v, 230v or 4v) or pneumatic (25 PSI ) actuators.

Class I (airfoil blade models)

Model EFNA - Class I fire/smoke damper w/sleeve, airfoil blade

Model EFTA - Class I fire/smoke front access damper w/sleeve, in/out wall/floor mtg.

Model EFSA - Class I fire/smoke damper w/sleeve, out of wall/floor mtg

Class II (airfoil blade models)

Model EGNA - Class II fire/smoke damper w/sleeve, airfoil blade

Model EGTA - Class II fire/smoke front access damper w/sleeve, in/out wall/floor mtg.

Model EGSA - Class II fire/smoke damper w/sleeve, out of wall/floor mtg