Müller KNX 24705 Room Climate Controller, Air Quality-Temperature-Humidity Sensor GS 41.12 KNX

In modern KNX building automation, precise indoor climate monitoring is essential for comfort and energy efficiency. The Müller KNX 24705 Room Climate Controller combines air quality, temperature, and humidity sensing with integrated PI controllers for heating, cooling, and fan control. It is designed for surface-mounted installation in offices, meeting rooms, and residential spaces where a single multi-sensor device can manage room climate functions.

Key specifications

• Measures air quality (VOC/CO2 equivalent), temperature, and relative humidity
• Temperature measuring range: 0 to +50 °C with ±0.5 °C accuracy at 25 °C
• Humidity measuring range: 0 to 100 % RH with ±3 % RH accuracy (20–80 % RH at 25 °C)
• Air quality measuring range: 0 to 2000 ppm CO2 equivalent (VOC)
• Integrated PI controllers: heating/cooling (1/2-stage) and fan (3-stage)
• Additional functions: dew point calculation, absolute humidity calculation, limit value monitoring, logic gates, scene functions
• KNX bus powered (21–32 V DC), current consumption approx. 10 mA
• Surface-mounted, IP20, plastic housing in white (RAL 9010)
• Operating temperature: 0 °C to +50 °C
• ETS 5 or higher required for configuration

Why choose it

This device consolidates multiple sensors and controllers into one KNX unit, reducing wiring and simplifying project design. Its PI control algorithms enable efficient regulation of heating, cooling, and ventilation, while the air quality measurement supports demand-controlled ventilation strategies. The white plastic housing blends discreetly into most interiors.

Ideal use cases

• Offices and conference rooms requiring automatic climate control based on occupancy and air quality
• Residential buildings with KNX systems for individual room temperature and humidity management
• Schools, hotels, and commercial spaces where indoor air quality monitoring is part of the building management system

Good to know

The device is powered directly from the KNX bus, so no separate power supply is needed. It must be configured with ETS 5 or later. The sensor is intended for indoor use only (IP20) and should be mounted on a flat surface away from direct sunlight or drafts for accurate measurements.