KNX is ideally suited for HVAC control within a room or rooms where multiple disciplines are linked together. Download HVAC PDF
This can mean HVAC, lights and blinds all sharing information and coordinating with each other via the KNX network.
- There are KNX devices covering many different elements of HVAC and room control. These include fan coil units, chilled ceilings, radiators and zone valves, air quality and many others.
- A typical example of HVAC control may be to have a fan coil unit (FCU) in a room whilst monitoring air quality, allowing the fan speed or fresh air input to the room to be adjusted automatically.
- By using KNX, the FCU controller and the air quality sensor can be easily connected to the KNX network. As the air quality sensor only connects to the KNX bus, its installation is easier and more cost effective than a traditional sensor.
- In this example, the FCU controller, radiator valve and air quality sensor are all connected together via the KNX bus.
- Many of the devices themselves are also powered by the KNX bus, keeping the installation simple and cost effective.
- Air quality is a key factor in many modern buildings and where LEED or BREEAM certification is required often a high number of CO2 sensors are needed to ensure all zones are covered.
- Using KNX sensors for this CO2 air quality measurement greatly reduces the installation effort.
- The benefits of using KNX for HVAC are further demonstrated if a room needs other disciplines as this enables an extremely energy efficient solution to be achieved.
- Many Building Management Systems (BMS) have links allowing the KNX to be shared to other parts of the system via BACnet, OPC or other open protocol solutions.
- This ensures that the complete building can be made as energy efficient as possible and data can be shared between all elements of the building controls.