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Motorized Smoke Fire Damper

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Motorized Smoke Fire Damper

Firmac MSFD is a UL 555 certified motorized smoke and fire damper designed to prevent the spread of smoke and flames through HVAC ducts. Built with galvanized steel and equipped with high-performance actuators, it ensures reliable operation during emergencies. With Class I leakage performance and fire ratings up to 3 hours, it is ideal for critical safety applications in commercial and industrial buildings.

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About the Product

Motorized Smoke Fire Damper

Combination Fire/Smoke dampers meeting or exceeding the following specifications shall be furnished and installed at locations shown on plans or as described in schedules. Dampers shall meet the requirements of NFPA 90A and SMACNA. Dampers for use in smoke control systems and 1½ hrs / 3 hr. fire rating in accordance with the version of UL 555/UL555S.

Product Features

  • UL 555 – Classified Motorized Fire Damper 3-hour Fire Rating
  • Meets NFPA Standards.
  • Meets SMACNA Standards
  • Leakage Rating – Class III
  • Max Velocity – 2000 fpm
  • Temperature – 250 °F (121 °C)
  • Max Operating Pressure – 4 in. w.g (1000 pa)

Fire Endurance Test

Fire Endurance Test and Hose Stream Test (UL 555) Dampers are exposed to a standard test fire for a period of either t1/2 or 3 hours. This standard test fire is controlled to follow the time temperature curve illustrated.

Operational Reliability Cycle Test

Firmac’s Fire Smoke Dampers intended for operation by gravity or spring force (not driven by an actuator) must be cycled open and closed 250 times.

Salt Spray Exposure Test

The damper sample is exposed to salt spray in a test chamber for a period of 120 hours.

Operational Performance Test

The damper is subjected to airflows and pressures and must demonstrate its ability to operate in the manner expected by its configuration and intended application.

Temperature and Cycling Test

The damper with an actuator that has previously been subjected to the OPERATIONAL RELIABILITY CYCLE TEST is exposed to an elevated temperature of 250°F (121°C) minimum.

Leakage Test

Firmac MSFDs are UL 555 Certified with Class I Leakage Performance (≤ 4 cfm/ft² at 4 in. w.g.), ensuring minimal air leakage and high sealing efficiency.

Applications

  • Installed in HVAC ducts that penetrate fire-rated walls or floors

  • Prevents the spread of smoke and fire through air distribution systems

  • Essential for life safety in commercial and industrial buildings

  • Commonly used in hospitals, airports, malls, and high-rise structures

  • Supports compliance with fire safety codes and smoke control requirements

Available Specifications

  • Motorized Fire Damper MFD-FG
  • Motorized Smoke Damper MSD-FG
  • Motorized Smoke and Fire Damper MSFD -FG

All damper actuators are mounted on the left side (standard); right side optional, 240V actuator standard; 120V available upon request.

Custom sizes available upon request.

Why Choose Us?

Precision-Controlled Airflow for Maximum Efficiency At FIRMAC, we offer a comprehensive range of high-performance HVAC dampers engineered for accuracy, durability, and energy efficiency. Whether you need to regulate airflow, ensure fire safety, or maintain system balance, our dampers are designed to meet the most demanding project requirements.
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