Dorgard Fire Door Retainer

Dorgard is a wireless fire door retainer that holds fire doors open, allowing them to
automatically close on the sound of the fire alarm.
Installed onto the bottom of the fire door in under 5 minutes, Dorgard is listening for a
continuous fire alarm of 14 seconds or more. Upon this, Dorgard will release the fire
door to close, preventing the spread of smoke & fire.