Fire/Smoke Combination Dampers


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Combination Fire/Smoke Dampers function as both a fire damper and a smoke damper in a single unit.  HVAC system designers often combine smoke barriers and fire rated partitions, requiring both a fire damper and a smoke damper to be installed in the same location.  A combination  Fire/Smoke damper is recommended in this situation.

Lau Fire/Smoke dampers meet the requirements of both UL Standards 555 (fire dampers) and 555S (smoke dampers).  

All combination Fire/Smoke dampers require factory installed actuators, either electric or pneumatic.  They are controlled by a smoke or heat detector signal, fire alarm or other building control system to prevent the spread of smoke.  Manual or automatic override allows the damper to be used as part of an engineered smoke control system.  When temperatures exceed the closure temperature of the damper, the blades close and lock to protect the integrity of the fire rated partition.  Lau Fire/Smoke dampers are always supplied with the appropriate factory-mounted actuator and UL label.

CFS1 Class I Fire/Smoke Combination Dampers
CFS2 Class II Fire/Smoke Combination Dampers
CFSR25 True Round Class I Fire/Smoke Combination Dampers

Installation Instructions
Fire/Smoke Damper Installation Instructions
CFSR25 Installation Instructions
Fire Damper Operation & Maintenance Instructions

Supplemental Installation Instructions
Cavity Shaft Wall Metal Stud Framing
Concrete Floor with Steel Deck Installation
Extension of Damper Sleeves
Fire Resistant Ventilated Duct Assembly
Flanged System Breakaway Connections
Optional Firestop Material
Optional Sealant of Dampers
SP100 Field Installation
TDF & TDC Field Add-On Connections
Transfer Openings & Grille Duct Terminations

Technical Information
Air Performance Data for Fire/Smoke Dampers
Controlled Closure
Field Procedure for Testing the EFL
Fire/Life Safety Products Quick Reference Chart
Fire/Smoke Damper Actuator & Access Space Envelopes
Fire/Smoke Damper General Information

DSDF Flow Duct Smoke Detector
DSDN No Flow Duct Smoke Detector
EFL/SP100 Fuse Link & Switch Package
Electronic Fuse Link (EFL)
FAST & PFMA Mounting Angles
Fire/Smoke Damper Actuators
Master Control Panels
Pneumatic Fuse Link (PFL)
TS150 Firestat

331-2961 Siemens Pneumatic Damper Actuator
331-3060 Siemens Pneumatic Damper Actuator
331-4827 Siemens Pneumatic Damper Actuator
FSLF120(-S), FSLF24(-S) Belimo Electric Damper Actuator
FSNF120(-S), FSNF24(-S) Belimo Fire/Smoke Damper Actuator
H2000 120V Honeywell Actuator
H2024 24V Honeywell Actuator
ML4202, ML4302, ML4702, ML4802, ML8202, ML8302 Fast Acting, Two Position Actuator
MS4120F, MS8120F Fast Acting, Two Position Actuator
MS4209F, MS8209F Fast Acting, Two Position Actuator
OpenAir Series GGD Electronic Damper Actuator

Ordering Made Easy
Fire/Smoke Damper Ordering Made Easy