Building Environments 3

Why Choose United Enertech's Combination Fire/Smoke Dampers?

United Enertech designs and manufactures high-performance combination fire/smoke dampers engineered to protect lives and property while maintaining efficient airflow in commercial and industrial HVAC systems.

Combination fire/smoke dampers:

  • UL 555S and CSFM listed
  • 1 ½-hour and 3-hour 3V and AF dampers
  • Leakage Class I & II 3V and AF
  • Standard Momentary Test Switch (MTS)
  • BABA compliant
  • Backed by a 5-year warranty

The Best Lead Times and Express Options in the Industry

From applications in hospitals and high-rise buildings to schools, government facilities, and industrial life-safety zones, you can count on United Enertech for quality manufacturing and excellent lead times.

Have questions? Contact us. Our team is here to help.

View our product features below, and visit our website Resources page to view our Top 25 Products brochure.

Fire/Smoke Dampers

Top 25 Product Features

F/S-3V-I

Combination Fire/Smoke Damper, 3V Blade, Class I

F/S-3V-I

 

  • UL555 and UL555S File #R25410, ULC S112 and S112.1
  • Factory Installed Momentary Test Switch (MTS)
  • Rated to 2,000 fpm and 4" w.g.


F/S-AF-I
Combination Fire/Smoke Damper, Airfoil Blade, Class I

F/S-AF-I
  • UL555 and UL555S File #R25410, ULC S112 and S112.1
  • Factory Installed Momentary Test Switch (MTS)
  • Rated to 2,000 fpm and 4" w.g. 
  • Velocities up to 4000 FPM and 6” w.g. available

March 3, 2026