Air Aspirating Smoke Detection
Air Aspirating smoke detection Systems (VESDA)
Unlike conventional smoke detectors which rely on the smoke to reach the detector by way of convection, air aspirating systems or VEDSA constantly draw air into a central sampling detection chamber via a network of pipes.
The system is monitored 24/7 to make sure it is running correctly and because it is constantly drawing the air into its detection chamber (rather than waiting for ambient smoke to reach it) the system can detect smoke much earlier than conventional detectors.
These systems can detect smoke at the very early stages of combustion before being visible to the naked eye and are often used in clean rooms such as server, data and communications or electrical switch rooms and can pick up the very early stages of even a micro chip in a server starting to burn.
Multiple Alarm thresholds and staged alarms
The system is connected to a fire detection and alarm system to give warning of an impeding fire. We can also interface with our fire suppression systems and this is usually designed in a two stage format. Stage one of detection activates the fire alarm sounders and if a second or conventional smoke detector is activated within the protected area then stage two activates the fire suppression system to extinguish the fire.
These systems can be adjusted so that they can be used at a normal sensitivity level in warehouses or industrial areas where it would be difficult to install and maintain conventional smoke detectors. The tubing is installed throughout the protected area and the detector is fitted where it is accessable for servicing. The pipework once installed does not usually need to be touched.
Typical installations (High sensitivity level)
- Server rooms and data centres
- Battery rooms
- Electrical and Switchgear rooms
- Control rooms
Typical installations (normal sensitivity difficult to access areas)
- Warehouse roofs
- Lift shafts
- Inaccessible Voids
- Multi storey car parks
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Case studies
30/01/2026
Case Studies
Walmley Social Club Security Upgrade: Intruder Alarm and Addressable Fire Alarm Installation
Walmley Social Club is a busy, long-established private members’ venue in Sutton Coldfield, Birmingham, hosting everything from snooker and bowling to live music and large private events. To ens...
10/11/2025
Public Sector
Dr Milley’s Hospital Upgrades to a Modern Wireless Fire Alarm System
Location: Lichfield, Staffordshire Project: Wireless fire alarm system installation
04/06/2024
Residential
Comprehensive Security Upgrade for a Warwickshire Village Home
The Results
Our client, Mr Bryan Davis, commented: “I would like to thank you for your help and assistance with the alarms and CCTV, which are now fully inst...
14/06/2023
Schools
Bredon Hill Academy
Bredon Hill Academy is a well-regarded, 468-pupil middle school situated in the village of Ashton-under-Hill, four miles south of Evesham in Worcestershire.
15/05/2023
SMEs
Cookes Furniture & Storage
Cookes Storage Managing Director, James Pike, said he had been greatly impressed with the professionalism, service and attention to detail shown by the Justice team. “Initially, a very thorough ...
12/12/2022
Schools
The Shrubbery School
Founded in 1930, The Shrubbery School is the oldest co-educational independent school in Sutton Coldfield. Catering for children aged 3-11, the school operates from a part listed building and wa...
08/08/2022
Commercial
KLM Storage (Midlands) Ltd
West Midlands based KLM Storage is a long-established business, providing serviced warehousing and distribution solutions with a global coverage. Operating from an extensive 120,000 sq. ft site,...
04/05/2022
Commercial
Lodent Precision Ltd
Lodent had experienced a series of costly and disruptive thefts from their yard on an industrial estate in Staffordshire close to the M6 toll road north of Walsall and Wolverhampton.
17/12/2021
SMEs
Green Frog Power
Summary/background of company Green Frog Power builds and operates power stations in the United Kingdom, supplying stand-by power to the National Grid. ...
17/12/2021
Sports
Aston Villa Football Club, Aston, Birmingham
Instalment/solutions provided:
Intruder alarm systems
Aston Villa FC is a premiership football club, with a ground capacity of around 40,000, the largest in the Birmingham area. ...
17/12/2021
Public Sector
Job Centres, Staffordshire and West Midland
Instalment/solutions provided:
Integrated intruder alarm and smoke cloak systems
Local Jobcentres in the West Midlands provide information on available work opportunities and fa...
17/12/2021
Schools
John Wilmott School Sutton Coldfield West Midlands
Instalment/solutions provided:
Wide range of school security systems
At the John Wilmott School in Sutton Coldfield West Midlands, there was a need to enhance the existing securi...
04/11/2021
Commercial
TST Cosmetics Bodyshop, Wolverhampton
Instalment/solutions provided:
CCTV and intruder alarm installation
TST Cosmetics is part of the Innovative Repair Group, which runs vehicle bodyshops across Wales and the Midlan...
04/11/2021
Commercial
Chambers Ford motor dealers, dual sites
Instalment/solutions provided
Detector activated CCTV systems
Chambers Ford is a large, successful motor dealership with multiple sites across the country, including at Sutton Co...
22/06/2021
Construction
Bowmer and Kirkland
Bowmer and Kirkland was founded in 1923 and is one of the UK’s most successful privately owned construction, engineering and development groups.
22/06/2021
Local Authority
The Red Rose shopping Centre, Sutton Coldfield
Instalment/solutions provided:
Fire detection and alarm system
The Red Rose shopping Centre (Formerly known as the Sainsbury Centre) in Sutton Coldfield West Midlands is a shoppi...
22/06/2021
Residential
Multiple major house build companies
Instalment/solutions provided:
Intruder alarms
We have provided security solutions for most of the major house builders including Persimmon Homes, Laing, Bellway, Crest Nicholson...
22/06/2021
Retail
JD Sports
Instalment/solutions provided:
Intruder alarm & CCTV
JD Sports Retail was founded in 1981 and has grown over the years successfully acquiring other brand leaders such as First Sp...
22/06/2021
SMEs
SME's
Green Frog Power Builds and operates power stations in the United Kingdom. They supply standby power to the National Grid. Their sites are largely unmanned and Justice was contracted to come up ...
22/06/2021
Surgeries
Multiple doctor & dental surgeries
Instalment/solutions provided:
Integrated CCTV systems, Panic alarms and door access control devices
We have worked with a wide range of Doctors and Dental surgeries of differing...
21/06/2021
Banking
HSBC
HSBC is one of Britain’s largest Banks and has recently had a refurbishment of most of its Branches. Justice Fire and Security was contracted to carry out the upgrades and alterations to the Fir...