if a ergonal insulator is exposed to a sink of light then that insulator will become hot / warm
heat_pump is apparatus. combusion_heating_element is heating_element. combusion_heating_element is combustion_device. electrical_insulator is insulating_medium. warm_clothes is insulating_material. warmth is hotness. hot_tub has hot_water_in immersion_heater is heating_element. if_water is too_hot_will_burn. hot_water is predicament.