KNX in Building Automation

In residential construction, KNX typically controls lighting, blinds, heating and security with 20–200 devices. In commercial buildings (offices, hotels, schools), 200–2,000+ devices across multiple lines are common. In infrastructure and public buildings (railway stations, airports), installations can comprise several thousand devices with an IP backbone.

The unique selling point of KNX over proprietary smart home systems is cross-manufacturer interoperability: a Theben switch actuator responds to a Gira push button telegram without a gateway. No vendor lock-in, the installation can be extended with devices from different manufacturers over decades.

KNX installations typically have a service life of 20–40 years. The TP protocol from 1990 remains compatible with current devices, investment protection that proprietary systems cannot offer.