A smart thermostat will work best with WiFi; however, in the case that your WiFi suddenly stops working, you can still operate your smart thermostat without WiFi. Without a WiFi connection, your smart thermostat is still able to perform the basic heating and cooling functions of a regular thermostat, but you will not have access to any of the additional features of a smart thermostat. To learn more about getting a WiFi thermostat installed in your home, call us today.