By wireless we mean no wires! Celsia thermostats (unlike some 'wireless' thermostats) are battery powered. You can install a CZC in minutes without an electrician and without disturbing the decor. Simply mount the back plate to the wall and clip it on. You can then connect the thermostat to any number of heaters within range (typically 30m indoors) by following a simple connection sequence described in the user guide.
The Celsia system uses the European 433.05-434.79 MHz frequency band for Short Range Devices. By avoiding the popular 2.4GHz frequency we make Celsia impervious to interference from products that use for example WiFi or Bluetooth.
For a given power, 433MHz penetrates plasterboard walls and masonry better than 2.4GHz. We have had reports of Celsia working at a 200m range through several walls. By comparison, 2.4GHz signals do not penetrate walls as easily so transmission from one room to another can be patchy.
Compared to other methods of radio communication (such as Bluetooth or Zigbee), the Celsia protocol is very simple. As a result we can achieve very low costs and very good battery life. Why buy a juggernaut if a bicycle will do?