Prefco is the leading brand of Life Safety, fire, smoke and Ceiling Radiation Dampers. Prefco is dedicated to providing the best service of any manufacturer serving the HVAC market today. Our products are designed, manufactured and tested in compliance with appropriate UL standards for safety as well as many state & international standards.

Series 5000 multi-blade fire dampers are UL555 fire dampers that can be either
static or dynamic rated. When applied in a dynamic (fans on) system, this
damper has been evaluated with bi-directional airflow, and is rated to 3000 FPM
and 4" static pressure in compliance with UL555 6th edition.

Series 5050 is a combination fire & smoke damper with a 1 1/2
rating available with your choice of Class I, II, or III UL555S Leakage
damper utilizes a thermally responsive electric switch to allow for
spring of the specified actuator to close the damper upon elevated
The damper may be installed vertically or horizontally for use in
requiring both fire and leakage protection. This damper has been
bi-directional airflow, and is rated to 2000 FPM and 4" static pressure
compliance with UL555 6th edition and UL555S 4th edition.

Series 5150 is a UL555S approved Smoke damper available for Class I, II, or
III. Series 5150 can utilize a variety of internally or externally mounted
actuators. The damper may be installed vertically or horizontally in ducts
penetrating barriers requiring leakage protection, within 24" of the barrier
being protected. This damper has been evaluated with bi-directional airflow,
and is rated to 2000 FPM and 4" static pressure in compliance UL555S 4th
edition.

Series 5600 provide fire and heat radiation protection of HVAC penetrations in
floor/ceiling and roof/ceiling assemblies with restrained or unrestrained ratings of
either 2 or 3 hours. Standard fire dampers (1 1/2 or 3 hr) do not provide the
required heat protection for ceiling penetrations.

Series 5500 E4 or DE4 curtain fire dampers are UL Classified for installation in walls,
floors, and partitions requiring a fire damper. Series 5500 E4 or DE4 is available with
a UL555 Listing of either 1 1/2 or 3 hours. These dampers may be installed vertically
or horizontally in static (5500 E4) or dynamic (5500 DE4) systems.