Can the heat level be set in Celsius or Fahrenheit?

The heat level will be set on the thermostat and not on the unit heater itself. Temperature controls are done with the thermostat and can be changed from Fahrenheit to Celsius. We do recommend that you give us a call so that we can get the correct thermostat that has Celsius controls for you and we will also be able to answer any further questions you may have. Thanks!