I have a Kozi Previa Cast Iron stove and there are three ways you can run it: 1. Manual 2. Auto - turns on and off based on the settings on a thermostat 3. High/Low - heater will alternate from a factory preset low to the setting you have chosen with the Heat Select button. This mode is almost exclusively used with a wall thermostat and is highly recommended since it can create substantial fuel saving. There are five heat select options (1-5) with 5 being the highest. I don't quite understand the High/Low mode. Does the unit run on whatever heat select option it needs to to reach my thermostat set temperature and then kick back to the lowest heat select option? Any help is greatly appreciated. Thanks.