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Our Main Office:
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Garage Door Opener Guide LiftMaster LM21XP High Performance Release Device The LiftMaster LM21XP is a high-performance release device engineered to enhance fire safety in commercial and industrial settings. Designed for use with rolling doors, single-slide, and center-parting level and inclined track doors, this device ensures reliable operation during emergency situations. Its compliance with UL 864 […]
Garage Door Opener Guide LiftMaster LM21XPBB Extended Performance Release Device The LiftMaster LM21XPBB is an advanced fire door release device designed to enhance safety and reliability in commercial and industrial settings. This device ensures that fire doors operate effectively during emergencies, providing a critical component in fire protection systems. Its compliance with UL 864 Revision […]
