Magnetic Door Release Fire Alarm

One of the earliest methods to release a held open fire rated door was a heat release built as part of the pivot joint on the arm of the door closer photo 1.

Magnetic door release fire alarm. They provide a high holding force. Loss of power to the lock. The new sections allow the electromagnetic lock to be released by a door mounted release device i e. Electromagnetic door holder releases are designed for virtually any remote door release applications.

These requirements are found in nfpa 72 2013. If you are using smoke detectors for the purpose of door releasing service than the following code shall apply. Smoke detector installation for fire rated doors and magnetic door holders. They must be used in conjunction with closing devices.

Fire smoke barrier doors door releases when tripped by an alarm or smoke detector private offices door releases when triggered by a remote switch. These devices hold the doors open in the day to day running of the building but will release the fire doors if there is a fire allowing the fire door closers to do their job. Actuation of the fire alarm. The fire alarm control panel.

Fire door retainers also called fire door holders allow occupants to hold fire doors open in a legal and safe manner removing the temptation of wedging the doors open. The dorgards are great by the way but if the spec is magnetic door retainers they may want them as opposed to dorgards but if its high end property which a flat worth 3 5 mill is id expect a proper fire alarm in tbh a 2 zone panel is cheap enough and will give you the felxibility you need and give you extra income on repairs and servicing.