Please Note: Alarm sound level at the door's location must be higher than 65 dB to ensure that the Dorgard will detect and respond.

Should the noise level in your premises exceed 80 decibels it is unlikely that you would hear a 65 decibel alarm, therefore the Dorgard releases the fire door to close.

It is generally recommended to install them at the top of the door to prevent warping caused by the door closer pulling against the electromagnet.

The retainer is attached to the bottom of the door and requires simple calibration to ensure proper functionality.

Within the risk assessment for the building there should be an instruction that in the event of a failure in the fire alarm system, all door hold-open devices should be manually deactivated. The Agrippa Acoustic Fire Door Retainer is modelled on the traditional magnetic style fire door holder that would have been hard-wired into the fire alarm system.

Dorgard is a wireless fire door retainer providing a straight-forward, hands-free and legal method to keep your fire doors held ajar. The Dorgard fire door retainer is a BS EN 1155 compliant, wire-free solution for legally holding open fire doors that you can install in under 5 minutes. Once those hours have elapsed the Dorgard SmartSound will release the door at that time each day if the door is held open.These units are long-lasting, will hold open at any angle, and are compatible with various types of flooring. We would just like to express our absolute gratitude with the support of these upcoming projects we have found ourselves working on. In these environments, Dorgard SmartSound knows it would not hear the alarm and will close the doors. By ensuring easy access and preventing the spread of fire and smoke, the Dorgard retainer offers a compliant and effective solution to hold open fire doors.