Dorgard Acoustic Door Retainer
This Dorgard fire door stay is a fire rated device that allows a fire door to be kept open without compromising the security.
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This Dorgard fire door stay is a fire rated device that allows a fire door to be kept open without compromising the security. Dorgard continuously monitors the background noise, 'listens' for the fire alarm sound and releases the door when it detects a sound of 65dB for more than 14 seconds or instantly when the sound level reaches 80dB. The device is unsuitable for enviroments with high levels of background noise.
- Suits any self closing door with 5mm clearance under the door.
- Can be set for automatic night time release thanks to the in-built clock.
Complies with BS 7273-4 Cat. 'C' when installed correctly. Manufactured to comply with BS EN 1155:1997.
- Supplied complete with two LR14 / 'C' batteries, floor socket, warning stickers and fixings.