Simply "above or equal" conditions

[AllHailJ (J Gent)]

You could also create a simple thermostat through hacs:

Simple thermostat with preset modes management

This custom component for Home Assistant is an upgrade of the generic thermostat which handles presets mode in a very simple way. How Generic thermostat behaves with modes : Basically, the generic thermostat handle two preset mode : AWAY and NONE. When AWAY mode is set, the thermostat will set the temperature with the away temperature defined in the yaml configuration. When NONE is selected, the temperature set is saved. Every time you set the mode as NONE, the temperature will be automaticall…

Here is one of my fireplaces

I hope this helps.