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 European product standard for radio-linked fire detection components, and it is what separates professional wireless systems from consumer smoke alarms. Certified devices must prove bidirectional communication, automatic monitoring of every link, frequency agility to dodge interference, and supervised batteries that report months before they fade. The panel knows within minutes if a device stops answering — the same discipline a wired loop provides, delivered over radio.
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.
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. 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 installation 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.
When they carry EN 54-25 certification, yes. The standard forces the reliability question: every radio link is continuously monitored, devices communicate in both directions, transmissions hop frequencies to avoid interference, and battery state is supervised so replacements are planned months ahead. 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.
Typically three to ten years per device depending on the platform and how often sounders run, with five years a reasonable planning figure. Because EN 54-25 requires battery supervision, the panel reports each device’s state long before failure — low-battery warnings arrive months out, and replacements are folded into routine six-monthly maintenance rather than emergency callouts. Battery changes take minutes per device and cost far less than the cable, containment and making-good a wired equivalent would have needed.
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 plant room behind metal-lined walls — a hybrid design runs cable to that zone alone and keeps wireless everywhere else.
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.