“heat”

22 symbols from Material Design Icons

heat-pump

heat-wave

heating-coil

heat-pump-outline

patio-heater

car-seat-heater

printer-3d-nozzle-heat

printer-3d-nozzle-heat-outline

hvac

radiator

hvac-off

radiator-disabled

radiator-off

sun-snowflake

sun-thermometer

water-boiler

sun-snowflake-variant

sun-thermometer-outline

water-boiler-alert

water-boiler-auto

water-boiler-off

weather-sunny-alert