KNX integrates with Home Assistant to give you intelligent climate control across your entire home. Manage thermostats, heat pumps, HVAC zones, and environmental sensors from a single dashboard — with automations that optimize comfort and energy efficiency.
With KNX connected to Home Assistant, your climate system responds to real conditions: occupancy, outdoor weather, time of day, and energy prices. No more heating an empty house or cooling rooms nobody uses.
HA DocumentationHow KNX Works with Home Assistant
Getting KNX connected to Home Assistant and running reliably.
Connect your climate devices
Add KNX through the integrations panel. Thermostats, sensors, and HVAC controls appear as entities with full temperature and mode control.
Zone-based management
Group KNX devices by room or zone. Set different target temperatures for bedrooms, living areas, and unused spaces.
Smart scheduling & automation
Build automations that adjust KNX based on occupancy, weather forecasts, or energy rates. Home Assistant learns your patterns and adapts.
Common KNX Issues
The problems installers run into with KNX and Home Assistant — and how a managed setup prevents them.
Thermostat schedule conflicts
KNX may have its own scheduling system that conflicts with Home Assistant automations. Running both simultaneously can cause the thermostat to fight itself, wasting energy and frustrating occupants.
Temperature sensor placement
KNX thermostats measure temperature at the unit, which may not reflect the actual room temperature. Without remote sensors and proper calibration, comfort suffers.
HVAC mode compatibility
Some KNX HVAC modes (eco, away, emergency heat) don't map cleanly to Home Assistant's climate entity model. Automations may not control all modes correctly without custom configuration.
Slow response to occupancy changes
HVAC systems are physically slow — heating or cooling a room takes time. Without predictive automation that starts climate control before occupants arrive, comfort and efficiency suffer.
Why installers choose managed KNX climate control
- Conflict-free scheduling that disables manufacturer schedules in favor of smart automation
- Multi-sensor temperature averaging for accurate room-by-room comfort
- Predictive heating and cooling that starts before occupants arrive
- Energy monitoring dashboards that show clients their actual savings
KNX devices we deploy
Hardware from the Selora catalog that runs on this integration. Every unit is tested and supported as part of a managed installation.
Hubs & Gateways
4 devices
SCN-IP000.03
The SCN-IP000.03 is MDT's KNX IP interface: a two module DIN rail device, powered from the bus, that gives Home Assistant a KNXnet/IP tunnel onto the KNX line. Four simultaneous tunnels mean ETS and Home Assistant can hold connections at the same time, with KNX IP Secure and KNX Data Secure available from ETS 5.7.
SCN-IP100.03
The SCN-IP100.03 is MDT's KNX IP router: the same two module bus powered hardware as its IP interface, plus line and area coupling over IP multicast. Home Assistant can tunnel through it like any interface, or join the bus by routing, which is the connection type that scales past a single line.
KNX IP Interface 732 secure
The 732 secure is Weinzierl's KNX Secure IP interface, one module wide and powered from the bus. Eight simultaneous KNXnet/IP tunnels and AES-128 KNX IP Secure make it the interface to specify when Home Assistant, ETS, and a visualisation all need to hold a connection to the same line at once.
KNX IP Router 752 secure
The 752 secure routes KNX telegrams between lines over the LAN as a fast backbone, and doubles as a KNX Secure interface with up to eight tunnels. One module wide and bus powered, it is the device that lets a multi-line KNX project use IP as its backbone and still give Home Assistant a way in.
Frequently Asked Questions
More Climate & HVAC Integrations
Ready to Install KNX Professionally?
Stop troubleshooting KNX integration issues. Let Selora handle the setup, monitoring, and maintenance so you can focus on your clients.