Most buildings aren’t all-or-nothing, and their fire systems shouldn’t be either. A hybrid fire alarm runs wired and EN 54-25 wireless devices on one panel, as one system, to one BS 5839-1 design. Gemini AMPM uses them to protect live buildings, phased refurbishments and awkward extensions without compromise at either end.
In a hybrid system, the backbone stays hardwired — the panel, its network and the areas where cabling is straightforward — while translator modules bring EN 54-25 radio devices onto the same loop. Detectors, call points and sounders then mix freely: wired in the ceiling void that’s easy to reach, wireless in the ornate stair, the tenanted floor, the mezzanine added last spring. To the panel, and to anyone reading its log, every device is simply an addressable point.
Crucially, nothing about the design relaxes. Coverage, categories, zoning and cause-and-effect all follow BS 5839-1 exactly as a fully wired system would, and commissioning proves every device regardless of how its signal travels. We engineer hybrids on open-protocol equipment with EMS, HyFire and Hochiki wireless ranges, so the system stays maintainable by choice, not by hostage-taking.
Hybrid comes into its own when a building changes in stages. During a phased refurbishment, wireless devices protect each zone the moment hoarding goes up, then wired points replace them as ceilings open and close — the panel simply re-learns the loop at each phase, and cover never lapses between contractors. The same logic serves live sites: a hospital ward, a hotel wing or a working warehouse gets detection now, with cabling deferred to planned shutdowns.
It is also the honest answer for buildings that will never suit full wiring — a listed frontage on a modern warehouse, a courtyard block with a dozen separate roof voids. You pay for cable only where cable earns it. Budgets follow the same shape: wireless devices cost more per point but erase containment, making-good and hours of labour. We price both routes per area and let the numbers decide.
It is a single fire detection system in which some devices connect to the control panel by cable and others by EN 54-25 radio, usually through translator modules on the wired loop. There is one panel, one zone plan, one cause-and-effect programme and one certificate — not two systems bolted together. The choice of medium is made room by room during design, based on access, fabric, disruption and cost, while the protection delivered meets BS 5839-1 throughout.
When a meaningful part of the building is cheap to cable. Wireless devices carry a hardware premium, so if your ceiling voids are accessible, corridors are being refitted anyway, or a new extension is at first-fix stage, cable wins in those areas on cost and simplicity. Hybrid lets you take that saving without forcing cable through the difficult remainder — occupied suites, listed rooms, external buildings. Fully wireless earns its keep when nowhere is easy.
Often, yes. If your panel is open protocol and a compatible translator module exists for its loop devices, wireless points can join the existing system and appear at the panel like any other address. Our surveyors confirm compatibility, run a radio survey, and check the panel has loop capacity and current software before promising anything. Where a closed-protocol panel blocks the route, we will say so plainly and price the alternatives — including a phased panel replacement.
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.