I used mdi for home automation. Some icons for heating and cooling of a room would be super useful.
So, thermometer + up/down arrow?
or heat coming out of a vent
maybe: fire / ice / snowflake
example use case:
thermometer with up and down is good.
fire is a bit to alarming to see on homeautomation etc. It's possibly best used to mean actual fire.
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So, thermometer + up/down arrow?