Wireless fire alarm systems,
without a metre of cable.
Some buildings punish cabling: listed interiors, occupied floors, sites that change shape every month. Wireless fire alarms solve all three. Gemini AMPM installs EN 54-25 certified radio-linked detection that meets BS 5839-1 exactly as wired systems do, commissioned in days rather than weeks, with no chases, no lifted floors and no redecoration bill.
EN 54-25 is the line
between kit and gadgets.
BS EN 54-25 is the European product standard for radio-linked fire detection, and it is what separates professional wireless fire alarm systems from consumer smoke alarms. Certified devices must prove bidirectional communication, automatic monitoring of every link, immunity to interference, and supervised batteries that raise a low-battery fault at least 30 days before the battery can no longer support the device. The panel knows within minutes if a device stops answering: the same discipline a wired loop provides, delivered over radio. Good platforms go further still, hopping between radio channels to sidestep congestion and warning of low batteries months out, not weeks.
Performance requirements don’t relax either. A wireless system is still designed to BS 5839-1, to the same categories and the same spacing rules, and it is still commissioned device by device with signal strength surveyed and recorded. We work with proven wireless platforms (including HyFire and EMS equipment alongside Hochiki detection), and every design starts with a radio survey of the actual building, not an assumption about it.
Scoped, delivered,
evidenced.
- Radio survey first: signal strength measured through your actual walls and floors before any design is priced.
- EN 54-25 devices: certified detectors, call points and sounders with monitored links and supervised long-life batteries.
- BS 5839-1 design: the same categories, spacing and certification as wired systems, delivered under BAFE SP203-1.
- Heritage-safe installation: no chases, clips or drilled joists through listed fabric; conservation officers stay happy.
- Rapid deployment: full systems commissioned in days, including temporary cover for construction, refurbishment or waking watch replacement.
- Painless expansion: new devices pair to the existing panel in minutes as layouts, tenancies or risks change.
Listed walls, live sites,
and no time to close.
Heritage and listed buildings are the obvious case: detection goes in without chasing cables through fabric that a conservation officer, rightly, will not let you touch. Buildings with asbestos get the same benefit, because nothing needs drilling through fabric that is safer left alone. Occupied buildings are the quieter revolution. Hotels, care settings and multi-tenant offices get full coverage installed around daily life, floor by floor, without ceiling voids opened above people’s desks. On one Liverpool residential landmark, our wireless fire alarm installation at Unity Liverpool replaced a costly waking watch with permanent automatic detection.
Speed is the third advantage. A device pairs with the panel in minutes, so temporary schemes for construction phases, decant buildings or event spaces become genuinely practical, and the same devices can be recovered and redeployed later. Expansion is a purchase order rather than a rewire. If parts of your building do suit cable, a hybrid layout blends both. Explore the rest of our fire detection services to see how the pieces fit.
A commercial wireless fire alarm system
is still a BS 5839-1 system.
The phrase covers two very different products, and the difference matters. Domestic interlinked smoke alarms (the kind fitted in houses under BS 5839-6) talk to each other and nothing else. A commercial wireless fire alarm system is a full BS 5839-1 installation: a panel, zones, monitored devices, cause-and-effect, and certification your insurer and fire risk assessor will recognise. Radio changes how the signal travels, not what the system must do.
For a business the practical questions are the same as for any detection project: what category the risk assessment demands, how the building is used, and what downtime an installation would cost. Wireless usually wins on the last one. Modern platforms are also hybrid-capable, so wireless devices can extend a wired panel when a mezzanine, annexe or new tenancy appears. For server and comms rooms, detection pairs naturally with gas suppression. Still weighing it up? Our guide on when to choose a wireless fire alarm system walks through the decision honestly.
The buildings that get the most from commercial wireless fire alarm systems share one trait: they cannot easily stop. Multi-tenant offices avoid negotiating cable routes through other tenants’ ceilings. Hotels keep rooms selling while floors are covered in sequence. Care settings stay calm, with no dust, noise or lifted floors around residents. Warehouses span radio across racking and mezzanines that would swallow weeks of containment. If you are weighing a wireless fire alarm system for business premises like these, the question is rarely whether radio can do the job: it is what a wired installation would cost you in disruption while it went in.
From radio survey
to signed certificate.
Every job starts with a radio survey: signal strength measured through your actual walls and floors, not estimated from a floor plan, before any design is priced. The design that follows is BS 5839-1 in the full sense (category, zones, device spacing), delivered under our BAFE SP203-1 registration (ID 302260), so third-party certification reads exactly as it would for a wired system. It is the difference between wireless fire alarm installers and device fitters, and it is where cheap quotes come unstuck.
Installation itself is quick and quiet. Devices pair with the panel in minutes, floors are covered in sequence around your operation, and commissioning records signal strength device by device, leaving a measured baseline for the life of the system. Handover looks like any wired project: certificates, commissioning records and training. Tell us about the building and we’ll tell you honestly whether radio suits it: talk to Gemini.
Two waking watches stood down,
in four weeks apiece.
At the Unity Building in Liverpool, one of the tallest residential buildings in the UK at 26 storeys, FirstPort wanted a costly waking watch gone. Our Unity Building case study shows what replaced it: a Hyfire Taurus wireless system across every communal area and all 161 apartments, fitted by eight engineers in four weeks, more than 1,000 components, finished ahead of schedule and to budget. Concerns that radio would struggle through thick concrete proved, in the client’s words, completely groundless.
In Tower Hamlets, the job was four occupied towers at once: Elektron, Neutron, Proton and Switch, 497 apartments plus communal areas, covered by a Taurus design carrying 90% less cable than a traditional hard-wired system. Pre-programming the 2,000 devices cut the programme from six weeks to four, and with the waking watch stood down, annual savings exceeded £2,500,000. The Tower Hamlets case study has the full scope.
Supervised by the panel.
Serviced twice a year.
A wireless system largely watches itself between visits. Every radio link is monitored automatically, so a device that stops answering raises a fault at the panel within minutes, and supervised batteries report their state long before they fade. Low-battery warnings arrive months out, turning battery replacement into a planned line on a service visit rather than an emergency callout. Changes take minutes per device and cost far less than the cable, containment and making-good a wired equivalent would have needed.
The obligation itself does not shrink: a wireless fire alarm system is tested and maintained to BS 5839-1 like any other commercial system. We fold battery state, device testing and signal checks into routine six-monthly maintenance, and because commissioning recorded signal strength for every device, each visit has a baseline to compare against. A building change that degrades a radio path gets caught at the service, not at the fire.
Related services,
one point of accountability.
A wireless system is installed once and lived with for years, which is why fire alarm service and maintenance sits behind every installation we hand over: six-monthly visits with battery state and signal checks folded in. Fire alarm monitoring connects the panel to an alarm receiving centre, so a 3am activation is answered rather than sounding to an empty street. And where part of a building genuinely suits cable, hybrid fire alarms run wired and wireless devices on one panel, as one BS 5839-1 system.
Common questions on
wireless fire alarms.
Are wireless fire alarms as reliable as wired systems?
When they carry BS EN 54-25 certification, yes. The standard forces the reliability question: every radio link is continuously monitored, devices communicate in both directions, immunity to interference is proven, and battery state is supervised. Modern platforms go further, hopping channels to avoid congestion. A failing link raises a fault at the panel just as a cut cable would. The genuine risks (poor signal paths, casual surveys) are design problems, which is why we measure the building before we quote it.
What is a commercial wireless fire alarm system?
It is a full BS 5839-1 fire detection system that uses radio instead of cable to connect devices to the panel. Detectors, call points and sounders are certified to BS EN 54-25, links are monitored continuously, and the design uses the same categories and spacing rules as a wired system. The only thing that changes is the installation: no cable runs, so less disruption and a faster programme.
How quickly can a wireless fire alarm system be installed?
Far faster than a wired equivalent, because there are no cable runs, no containment and no making-good. Devices pair with the panel in minutes, so full systems are typically commissioned in days rather than weeks. Installation moves floor by floor around your operation, without ceiling voids opened above people’s desks, which is why wireless suits occupied and phased sites so well.
How long do the batteries last in a wireless fire alarm system?
Typically three to ten years per device depending on the platform and how often sounders run, with five years a reasonable planning figure. BS EN 54-25 requires battery supervision, with a low-battery fault raised at least 30 days before a battery can no longer support its device. In practice, modern platforms warn months out. Replacements are folded into routine six-monthly maintenance rather than emergency callouts. Changes take minutes per device.
Can a wireless fire alarm cover a large or awkward building?
Yes. Modern radio platforms use expander modules to relay signals, so coverage extends across thick masonry, multiple storeys and separate buildings on one site. Range in open air is hundreds of metres; real buildings vary, which is exactly what the pre-design radio survey establishes. Where one area genuinely defeats radio (a deep basement, a metal-lined plant room), a hybrid design runs cable to that zone alone and keeps wireless everywhere else.
Can wireless devices be added to an existing wired fire alarm panel?
Often, yes. Modern platforms are hybrid-capable, so wireless detectors, call points and sounders can sit on a wired panel and behave as part of one BS 5839-1 system. It is the practical answer for extensions, mezzanines, annexes and areas where running new cable would mean closing part of the building. A radio survey confirms signal strength before we commit the design to it.
Which standards apply to wireless fire alarm systems in the UK?
Two work together. BS EN 54-25 is the product standard for the radio devices themselves: it demands monitored links, bidirectional communication and supervised batteries. BS 5839-1 is the code the overall commercial system is designed, installed and maintained to, exactly as it is for wired detection. Gemini designs and commissions to both, under BAFE SP203-1 registration (ID 302260), so certification reads the same as any wired system.
What should I look for in wireless fire alarm installers?
Third-party certification first: BAFE SP203-1 is modular, and a registered business is audited on the modules it holds, which for Gemini covers fire detection design, installation, commissioning and maintenance. Then ask about the radio survey. Any installer who prices a wireless system without measuring signal strength through your actual walls and floors is guessing. Finally, check the handover: commissioning records with signal strength logged device by device, not just a certificate.
Do you supply domestic wireless fire alarm systems?
No, we are a commercial fire and security contractor. Homes are covered by a different code, BS 5839-6, and domestic interlinked smoke alarms are a different class of product from the monitored systems we install. Commercial premises (offices, hotels, care settings, heritage buildings) need BS 5839-1 detection, which is what our wireless systems deliver. If that is your building, we should talk.
Tell us about
the building.
A named engineer comes back within 24 hours, not a call centre. Site surveys are free for commercial premises, no obligation.
Talk to us about
wireless fire alarms.
A named engineer, not a call centre, comes back within 24 hours. Tell us the building and what you’re dealing with, and we’ll scope it properly.