Reliable connectivity for building management systems
Why cellular for building management?
Running a BMS over the tenant's or facility's IT network means firewall rules, change requests and shared risk. A dedicated cellular connection gives integrators and property owners their own secure path to every controller, gateway and meter, and it can be up and running the day the equipment is installed.
Looking at sensors, occupant comfort and energy use more broadly? See IoT for smart buildings.
Secure remote access to every building
Com4 connects BMS controllers, gateways and sensors over the mobile network, with traffic kept on a private connection from the building to your platform.
- Teltonika industrial 4G router with Com4 eSIM, ready for BMS gateways
- Private APN and VPN keep building traffic off the public internet
- LTE-M and NB-IoT for sensors and meters, 4G and 5G for gateways
- Pre-activated SIMs for fast installation on site
- Every connection managed in Polaris, our connectivity management platform
Com4 can help you connect a range of building systems
HVAC and energy
Monitor and adjust heating, ventilation and cooling remotely to cut energy use and keep tenants comfortable.
Remote maintenance
Spot faults early, update controllers and fix issues remotely, with fewer site visits.
Metering and sub-metering
Collect energy and water data from meters for billing, reporting and sustainability goals.
Access and security
Connect access control and building security systems on a separate, secure network path.
Portfolio-wide control
Manage every site from one place, whether you run five buildings or five hundred.
Discover the Power of IoT with Com4’s Exclusive Free Test Kit

Ready to revolutionize your IoT journey? Com4 invites you to experience the future with our Free IoT Test Kit – a gateway to seamless connectivity and unparalleled possibilities.
The Free IoT Test Kit includes:
- Up to 5 SIM cards per applicant
- 100 MB of data per SIM per month, usable within the EU
- A 60-day validity period
- Possibility to include eSIM form factor
- Support for multiple technologies, including 2G/3G/4G/5G, LTE-M, and NB-IoT, all within a single SIM
Global cellular connectivity for building management
Use the same connectivity for buildings in every country you operate in. Part of Wireless Logic, Com4 brings 15 years of IoT experience, 1000+ customers and 20M+ connections across the group.
We are your true partner for IoT connectivity.
Connecting a new building or a whole portfolio? Our IoT specialists help you choose routers, networks and security setup that fit your BMS.