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how do fire sprinklers work

How Do Fire Sprinklers Work?

how do fire sprinklers work

In situations where a building has a smoke detector, though they alert occupants to a potential emergency, sometimes this is not enough. Especially in places such as care homes where tenants may need extra time to evacuate. And this is where fire sprinklers stand out from other alarm systems. But, how do they exactly work?

At RAD Fire Sprinklers, we always advocate the installation of sprinklers in domestic and commercial buildings. Check out this helpful guide to how automatic fire sprinklers work and why they are so beneficial.


Fire Sprinklers Detect Heat

Contrary to popular assumption, fire sprinklers are not activated by smoke. Because heat is carried upward by smoke from a fire, it’s an easy mistake to make. In fact, it is difficult to accidentally set off these systems.

Fire sprinklers work because they are activated by high heat. When a fire starts, the air directly above it quickly heats up. This hot air rises to the ceiling and spreads. When the air becomes hot enough and reaches a sprinkler head, a chain reaction occurs.

A glass bulb filled with a glycerin-based liquid is found in most sprinkler heads. This liquid will expands when it detects a heat over 56°C.


Suppressing the Fire

The fire sprinkler system is connected either to the town main or a storage system within the property. The pressurisation of water in a fire sprinkler system is critical. This permits the water to jet outward in an arc, dousing the fire more thoroughly and preventing it from rekindling.

However, another misconception, not every sprinkler head will release water at the same time. If there is a fire in the kitchen, the sprinkler in your loft conversion will not go off; causing unnecessary water damage. Instead, the sprinkler head that is closest to the flame will suppress the fire in that room. Only if the fire starts to spread will more fire sprinklers release water.


When Should You Install Fire Sprinklers?

Commer fire sprinkler systems are installed by properly qualified contractors who adhere to LPCB guidelines and standards. Sprinklers are best installed while you are building a new home or modifying an old one in order to minimise disruption.

Fire sprinklers contribute between 1% and 2% of the entire cost of construction across the country. Retrofitting sprinklers during remodelling is often more expensive and the cost is determined by the existing structure. Many insurance companies provide a variety of savings to homeowners who use sprinkler systems, making it beneficial to shop around.


Work with professional installers to get the best quick response sprinklers, specifically for your building.


Our Services

Here at RAD Fire Sprinklers, we promote the installation of fire sprinkler systems throughout the London and South East area. There are many benefits to having fire sprinklers in both commercial and domestic buildings:

  • Saves Lives
  • Environmentally Friendly
  • Cost-Effective
  • Reduced Insurance Costs

For more information on our fire sprinklers, or to receive a quote, fill in our online form and a member of our team will shortly be in touch. Or, why not follow us on Instagram? Get the latest fire safety tips or have your burning questions answered by our dedicated social media team. 

Mist system was a great solution for our renovation needs and them team at RAD have been great. Always communicated clearly and been on hand to discuss over the phone as needed. Would highly recommend!
09:32 17 Jul 22
I have used RAD for a couple of projects and found them to be good to deal with. They did a pair of 3 storey open plan houses and seven three and four story town houses. The sprinklers were to improve fire safety, allow more flexible space and comply with building regulations. The sprinklers were far more cost effective than the mist type systems and look very discrete when installed.
Paul Jeary
15:50 11 Jul 22
It has been a pleasure to deal with RAD for installation of fire sprinklers at our site is Sevenoaks. They were fast, professional, working to time and quote, which made it easy to work with them.
Katrina Horobin
12:03 29 Jun 22
My requirement was a bit unusual for RAD in that I wanted a mist system in one room of a rented house. I had no drawings or technical back up. RAD were very helpful and repositioned the unit after the initial installation. Luckily with the help of Sonny, the engineer it all worked out very well.
Simon Gurney
16:16 12 May 22
I have used RAD for the last 10 years for all of my housing developments in need of a sprinkler system. Easy process from start to finish and no issues or problems throughout. Always someone at hand to answer a querie and we have a great working relationship with the team at RAD. Would highly recommend.
15:33 12 May 22
Diligent & a very professional team. A joy to deal with. Will certainly be calling on them to help with many more future schemes.
Jason Tema
22:17 08 Jul 19
Great team, fitting sprinklers, saving lives & property... What more could you wish for!!!
Colin P
17:53 01 Jul 17
Excellent company & great service... This company rocks! They sprinkle fires & save lives!!!
Music N Videoz
07:15 16 Dec 16
As somebody who feels that it should be a necessity for all properties to have fire sprinkler systems, I am a big fan of this company. I have used them numerous times to service my home system and they are very knowledgeable. I would highly recommend their service.
Kate Fraser
09:25 30 Mar 15
One look at Rad Fire Sprinkler's website will tell you that these guys know exactly what they are talking about when it comes to Fire Sprinklers and the legislation surrounding fire safety. A very trustworthy company.
Adam Hudson
16:45 15 Nov 13

Our Services Cover London and the South East

RAD Fire Sprinklers Map


RAD Fire Sprinklers Ltd.
58A St John’s Road
Tunbridge Wells, TN4 9NY

Mon – Fri: 8AM – 5PM

Tel: 01892 680 090

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