Fire doors and shutters are found in virtually all types of comercial buildings, including manufacturing facilities, warehouses, hospitals, stadiums, sports arenas, convention centers, and food court areas. They serve as physical barriers to stop the spread of fire and smoke from one area to another. LiftMaster® fire door release devices enhance the performance of these safety barriers by controlling the closure of the fire doors upon receipt of a signal from the smoke detector, heat detector, or building fire alarm system. The devices are an integral part of the door or shutters fusible link release assembly, providing fail-safe performance.

Ultimately, LiftMaster fire door release devices are designed to minimize property damage and provide increased safety for all building occupants. They provide a time-delayed release of the door for a period of up to 60 seconds to permit passageway clearance prior to door closure. Optional battery backup can ensure the door will not be released as a result of power failure (in non-alarm conditions) for up to 72 hours. For added safety of the individuals in or around the opening, a voice annunciator, strobe, or horn notification device can be installed to provide a verbal, visual, or auditory warning message prior to door closure.

Models are available for use with both non-motorized and motorized door applications. For motorized door applications, select models can be used to create a fully automated door closing system when used in conjunction with a standard commercial operator by providing features typically found on expensive, special-order fire door operators.




LM21AFCB Advance Fire Control Release Device LM21AFCB
Advance Fire Control Release Device
The AFCB fire door release device is designed to be used in conjunction with a standard commercial door operator to provide a fully automated door closing system.

LM21XP High Performance Release Device LM21XP
High Performance Release Device
The XP fire door release device provides a fail-safe release mechanism for non-motorized doors and acts as an interface between the door and fire alarm system.

LM21XPBB Extended Performance Release Device LM21XPBB
Extended Performance Release Device
The XPBB release device functions as a localized fire alarm system and can operate on 120VAC, 24VAC, or 24VDC power sources.