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Taking orders now. We are scaling manufacturing to meet demand.Full building control, no new cables
Rising energy costs, the EPBD renovation targets and poor indoor air quality push owners to renovate. A cabled retrofit is a construction project: risers opened, ceilings down, rooms out of use. Bisly Wireless installs the full Bisly system wirelessly, in days, while the building stays in use.
Full building control, no new cables: a building in use retrofitted with Bisly Wireless.
One wireless infrastructure for the whole building
The plant room stays the only wired island. Everything above it runs by radio, on open standards, in the same BMS as a wired Bisly building.
Bisly Wireless architecture: Wi-SUN backbone between base stations and zone gateways, Matter / Thread inside every zone, the plant room wired.
The hardware behind it
Nine devices cover a whole building. Everything in the zones is wireless and battery- or mains-powered; only the plant room is wired. Click a device to see it in the wireless portfolio.
New equipment, old problem: the control layer still needs cables
Cost that kills the case
Cabling, making good and floor-by-floor commissioning dominate the budget: labour is 50-75% of a controls project's cost, and the larger the building, the worse the ratio.
Disruption tenants feel
Risers opened, ceilings down, rooms out of use for weeks. In a building in use the indirect cost lands on top of the invoice.
Measured in months
Design, cable, terminate, point-map, commission: a wired retrofit is measured in months per building.
Scalable. Cost-efficient. Compatible.
Scalable
Start with one solution, one riser or one building. Add zones, buildings and use cases without construction.
Cost-efficient
No wall openings and no floor-by-floor commissioning. All wired work happens in one room, and a zone takes about 30 minutes.
Compatible
Open standards end to end: Matter and Thread in the zones; Modbus, M-Bus and DALI-2 in the plant room. No vendor lock-in.
Highlights of the solution
Retrofit during operation
Valves and sensors clip on; all wired work happens in one room; rooms stay in use.
Measured in days
About 30 minutes per zone; no wall openings, no floor-by-floor commissioning.
Scalable
Start with one riser, one floor or one building; add zones, buildings and use cases without construction.
The whole building on one platform
Room control, plant integration, metering and lighting on one platform, because isolated devices save single digits and the whole building saves 20%+.
Any Matter device
Any certified valve, sensor, light, blind or lock from any vendor joins the zone; buyers choose on price and fit.
Central control and automation
Schedules per zone or tenancy, set-back and pre-heat timed to occupancy, bookings or access events; open-window detection; geofencing.
Secure by standard
A PKI certificate per device on Wi-SUN, Thread encryption in the zone, Matter device attestation, outbound HTTPS to the cloud only.
Same BMS as your wired buildings
Every zone appears as ordinary points in the Bisly BMS; one digital twin, one platform, one app for the whole portfolio.
Partial control saves single digits. Full building control saves 20%+.
Field studies agree. A smart radiator thermostat on its own saves about 3%, because isolated control leaks heat next door. Room-level control across a whole building saved about 10% over 6 heating seasons in district-heated buildings, and buildings that combined it with hydronic balancing reached about 21%. Forecast-based plant control saved another 11-13% in separate studies. Bisly Wireless installs the full stack, which is where the savings compound: our own retrofits save 20-35%.
Return on investment in under 3 years. Energy is only the first line.
payback on a 10,000 m² district-heated office in Germany: 9.5 €/m² installed, 33 k€ saved every year
of the renovation budget: Bisly equipment on a renovated 40-apartment building (2,975 m², class B)
ceilings opened, risers cut or rooms out of use
Control every room, then the plant
Room level
Wireless actuators on radiators, fan-coils and floor heating. Temperature follows occupancy, schedules and geofencing; open-window detection pauses heating; CO₂ and humidity drive ventilation; local control continues if connectivity drops.
Scheduling
Calendar, holiday and out-of-hours schedules per zone or tenancy; set-back and pre-heat timed to occupancy, bookings or access events.
Plant level
Substation, heat pump and hot-water optimisation; AHU demand control, hydronic balancing, peak and capacity limits.
Price-aware
Flexible loads shift into cheap hours against day-ahead prices, with comfort unchanged.
Nothing goes unnoticed
Centralised control has a second benefit beyond energy: every device reports in, so the building tells you when something is wrong before a tenant does.
When it disconnects
A removed valve, a dead battery, a gateway offline or a sensor that stops reporting raises a priority-based alarm with the zone and device named, so the fix starts as a work order.
When it misbehaves
Adam's fault detection flags sensor drift, stuck actuators and short cycling; anomaly detection catches rooms that miss their setpoint, open windows losing heat and consumption spikes.
Across the portfolio
One dashboard ranks sites by energy, indoor air quality and active alarms. Geofencing, schedules and open-window logic are set once and applied to every zone; every event is logged for ESG and compliance reporting.
Integration into existing systems
Plant room
Existing substations, AHUs, heat pumps and meters join through the Bisly Server and integration modules over Modbus, M-Bus and DALI-2. Nothing is ripped out.
Metering
Wireless M-Bus meters across zones and tenancies, read by the Bisly M-Bus Gateway into the same platform; the lowest-disruption path to the 2026/2027 deadlines.
Lighting
Cabled DALI-2 where luminaire cabling exists; Matter lighting over Thread where it does not. Presence and daylight per zone, one energy picture with HVAC and metering.
How to start
Site survey
A two-hour walk-round that produces your building's own savings model, compliance check and phased plan, with an RF survey for coverage.
Pilot zone or floor
One floor or riser installed in days proves the infrastructure in your building, in use and undisturbed.
Building-wide rollout
Zones added without construction; solutions switched on as the building needs them. One platform across the portfolio.
Questions we get on wireless retrofit
Is wireless reliable enough for a building?
The wireless that earned a poor name was single-channel 2.4 GHz with 10-30 m range. The Bisly Wireless backbone is sub-GHz Wi-SUN with frequency hopping and a self-healing mesh, hundreds of metres per hop through floors and concrete, the same standard utilities use for smart meters. Control lives in the zone gateway, so a lost backbone link changes nothing in the room.
What about batteries?
Valves and room sensors are battery powered; the backbone carries kilobytes per zone per day, which keeps batteries alive for years. A low battery raises an alarm with the device named.
Can we mix wired and wireless?
Yes, and most estates do: new-build wired, retrofit wireless, both under the same schedules, alarms and reports. Plant rooms are always wired.
Can we start small?
Start with one riser, one floor or one building; add zones and buildings without construction. The RF survey covers the whole building so expansion is planned from day one.
When can we install?
We are taking orders now and scaling manufacturing to meet demand. Book the RF survey and we confirm your installation slot with the fixed price.
Is it fundable?
Renovation and efficiency programmes differ by country: see Funding by country under Resources, or ask in the discovery call and we bring the relevant scheme for your market.
Retrofits on Bisly
School in the old town · wireless lighting control installed during the school year, no cabling through finished classrooms.
22,000 m² office retrofit, in use during works, delivered in phases; energy use down 30%.
Retrofit of an existing office building: lighting, access and HVAC control.
Related
Wireless devices
The device set, the 3 radios and the comparison with the wireless you remember.
Learn moreRetrofit
The phased approach for buildings in use, wired where easy and wireless where not.
Learn moreOrder a site survey
Every Bisly Wireless project starts with an RF survey and ends with an acceptance report. Send us the building and the floors you have in mind; we come back with coverage, zones and a fixed price.
Taking orders now. Scope and a fixed price within 5 working days.