The version 2 is a single switch size and can be up to 12 buttons and feedback leds I tend to use mdt glass buttons - the version 1 you make your own lables/icons, and version 2 uses an lcd screen where you can program your own icons and send information back to the button The right choice of knx switch can give you a compact elegant solution with multiple buttons, feedback indicators, background illumination, icons, text etc all without using any loxone inputs or outputs - i tend to use them for 'public' rooms such as kitchens, entrance hallways, lounges etc, and normal buttons elsewhere Ive also used knx switches and dimmers where necessary, but only in certain areas: If you have a heat pump system, it probably has temperature compensation and a heat store in its own control system, so you leave the system with its own control system, and use loxone again to drive the output/demand via actuators/pumps etc but there isnt much point trying to replace the heat pump control systems or interfacing with them. In this situation you need to replace the manifold blender valve with an electronically controllable proportional actuator - eg a 2,3 or 4 port valve with a 0-10v actuator and a manifold temperature sensor so loxone can manage the manifold temperature You can use loxone to do temperature compensation of the manifold temperature to even out room heating times with different outside temperatures- that was a sudden cold night will cause the manifolds to be hotter and the IRCs startup time will still be approximately correct, resulting in rooms at the right temperature even with big variations of the outside temperature. If you are using ufh then even a boilers own temperature compensation wont do anything as the manifolds maintain their own temperature indepenently of the boiler output temperature in a recent design, the heating controls for a large ufh building with 4 manifolds and 38 actuators would have cost over £2k for the traditional zone controls - this was more than the cost of a loxone miniserver, 1-wire sensor for temperature sensors, dmx extension and dmx relays to control all the actuators, and so all the fancy features available through loxone including lighting, audio, etc came for free as part of the heating install. Obviously if you get the chance for a new install, then you wouldnt buy any controls from the ufh supplier, just the hardware and manifold actuators, then you are not throwing anything away. In a typical gas boiler install, you use loxone to control the manifolds or actuators on radiators, and receive the zone temperatures, but leave a modern modulating boiler to just be triggered by loxone using the single traditional stat input, delivering the currently required 'boiler lockout' for building regulations. Loxone can be made to work with almost any heating system to give end-user functionality and with regards to interfacing with heating systems, i think in most cases you dont actually need to at all - loxone works extremely well controlling the zones/outputs, usually replacing the controls that would be supplied with a multi-zone heating system where you replace the programmable thermostats and central stats with temperature sensors and switched outputs for controlling manifold valvies, zone valves and boiler pumps.
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