Jargon Buster
Welcome to our Jargon Buster, a simple, no-nonsense guide to help you understand the terms and phrases you might come across when using our site. Whether you're a healthcare provider, workplace safety officer, a concerned parent, or simply a first-time, buyer seeking to make an informed purchase, this glossary is here to take the confusion out of technical talk.
What is a Heat Detector?
A heat detector is an alternative fire detection device which is designed for use in naturally smokey or dusty environments.
See: Fixed Temperature Heat Detector | Rate of Rise Heat Detector
What is a Hold-Back?
Hold-back (also known as dogging) allows the latch and/or bolts of an exit device to be held in the withdrawn or open position. This allows free access through the door from both sides and also prevents the latch or bolts from being damaged if the door should be thrown closed.
The hold-back feature was designed for fire exit doors and should not be used on an internal fire door unless the door has been certified as a fire door with unlatched hardware.
What is a Hold-open Device?
A hold-open device on a door closer allows the door to be set in the open position without the use of a door wedge.
Mechanical hold-open devices are unsuitable for use on fire doors as they do not release the door in the event of a fire. If you wish to use a hold-open device on a fire door it is recommended that you use an electronically controlled model which integrates with the fire alarm system and releases the door when the alarm is activated. Electro-hydraulic hold-open devices also release in the event of a power outage.
What is a Hose Reel?
See: Fire Hose Reel