EFS Fire & Smoke Dampers

EFS Engineering is a manufacturer of Fire Dampers, Smoke Dampers and Combination Fire-Smoke Dampers. All dampers were tested in accordance with UL 555 and UL 555S standards, and are approved for installation in HVAC ducts.
The dampers are certified by UL, File number: R39644

Dampers Specifications

מדפי אש ומדפים משולבים אש-עשן מאושרים לעמידות אש של שעה וחצי, 1.5 שעותמדפי אש ומדפים משולבים אש-עשן מאושרים לעמידות אש של שלוש שעות, 3 שעות

Fire Resistance Rating

Fire dampers are certified for an hourly fire-protection rating, 1-1/2 or 3 hours.

EFS Dampers are certified for both 1-1/2 and 3 hours rating.

מדפי אש, מדפי עשן ומדפים משולבים אש-עשן מאושרים להתקנה אנכיתמדפי אש, מדפי עשן ומדפים משולבים אש-עשן מאושרים להתקנה אופקית

Vertical and Horizontal

Fire dampers are tested as part of fire-resistance rated vertical or horizontal assemblies in accordance with the Standard for Fire Dampers, UL 555. Smoke dampers are tested as part of a vertical or horizontal assemblies in accordance with the Standard for Smoke Dampers, UL 555S.

EFS Dampers are approved for both vertical and horizontal mounting position.

מדפי עשן ומדפים משולבים אש-עשן מאושרים לטמפרטורה מקסימלית 250Fמדפי עשן ומדפים משולבים אש-עשן מאושרים לטמפרטורה מקסימלית 350F

Maximum Temperature  

The smoke dampers are tested to the elevated temperature of 250°F or 350°F.

EFS Dampers are classified for 350°F.

מדפי עשן ומדפים משולבים אש-עשן בעלי דרגת אטימות CLASS 1מדפי עשן ומדפים משולבים אש-עשן בעלי דרגת אטימות CLASS 2

Leakage Rating

Leakage ratings are identified as Class Designation I, II or III with a minimum differential pressure of 4 in. water gauge (WG), across the closed
damper.

EFS dampers are classified as class I.

מדפים למערכות סטטיותמדפים למערכות דינמיות

Static / Dynamic Systems

Fire dampers for use in static systems, as their name implies, are used in duct systems or penetrations where the HVAC system is automatically shut down in the event of a fire.

Fire dampers for use in dynamic systems are required at locations in which fan pressure and airflow will be on during a fire incident, and as such, the dampers are expected to operate (close) against the air velocity and pressure produced by the system fan. In addition, fire dampers for use in dynamic systems are also provided with an airflow rating.

EFS Dampers are classified for both static and dynamic systems.

Maximum Size

EFS dampers are certified for single and/or multiple assembly sizes of up to 2.4*3.6 meters in both vertical and horizontal mounting position.

EFS Fire Smoke Damper UL 555 and UL 555S classified

Download Technical Information

EFS Dampers Datasheet
UL COC
UL Online Certifications Directory