For decades, KNX has been known as a wired standard: reliable, cable-based, and built to last the lifetime of a building. That reputation is well earned, but it has also led to the misconception that going smart with KNX always means opening up walls and pulling new cables. It doesn't. KNX RF brings the same open, secure, manufacturer-independent KNX standard to wireless communication, operating over radio in the 868 MHz band instead of a twisted-pair bus cable. The way KNX devices communicate, the device logic, and the ETS software your installer already uses all carry over, opening up new possibilities for renovation projects, listed buildings, and anyone extending a smart home without construction work.
Making heating wireless
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Heating is one of the most common reasons homeowners choose KNX RF. The ISE KNX RF Multi Radiator Thermostat fits directly onto existing radiator valves, with no new cabling required, and integrates into the KNX system through a media coupler. It's configured like any other KNX device via ETS, and its battery lasts up to two years under typical conditions. For homes without radiators, the Gira KNX RF Multi system extends the same principle further, bringing KNX Secure-protected wireless control to renovation projects that would otherwise require additional cabling. |
Through a media coupler, wireless and wired KNX devices operate as a single installation, allowing a battery-powered thermostat to work alongside a wired actuator, all configured within the same ETS project.
Learn more about KNX RF for renovated homes
Switching and scenes, wirelessly
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MDT's KNX RF+ product line brings this same wireless foundation to everyday switching. The Glass Push-button Plus replaces a conventional switch with a touch-sensitive glass surface for switching, dimming, and shading. Battery-powered models use MDT's DeepSleep technology, which transmits only when the switch changes state to conserve power. MDT cites battery life of up to 10 years across the RF+ range, although the exact lifespan depends on the device and how often it's used. The MDT KNX RF+ Push-button Plus offers the same wireless switching in a more conventional button format, programmable for one- or two-button operation. |
And if you'd rather keep your existing switches and sensors, the MDT KNX RF+ Universal Interface connects conventional push-buttons, switches, or presence detectors to the KNX system wirelessly, without replacing the hardware you already have.
Knowing when a window is open, and staying secure
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Security and ventilation benefit too. MDT's KNX RF+ Window Contact reports whether a window is closed, open, or tilted directly to the KNX system, with an integrated vibration alarm for added protection. It's available in white or stainless steel finishes, so retrofitting it doesn't mean compromising on the appearance of your home.
A common concern with any wireless technology is security, and KNX RF was built with that in mind. |
KNX RF devices can support KNX Data Secure, using AES-128 CCM encryption to protect communication between devices. This means going wireless doesn't mean compromising on security.
One system, wired or wireless
KNX RF proves that a cable is not what makes KNX. Openness, interoperability, and long-term reliability are its core strengths. Whether you're retrofitting a single room or extending a system that's been running for years, KNX RF lets you bring more of your home into it, with no new cabling required. A certified KNX professional can advise whether KNX RF is the right solution for your home and help you plan the best installation.
