auxiliary heating [3]![click to hear](/images/speaker.jpg)
oil-filled heater ![click to hear](/images/speaker.jpg)
Device made of tubes that circulate oil heated by electric elements.
fan heater ![click to hear](/images/speaker.jpg)
Device in which the air is heated by electric elements and diffused by a fan.
radiant heater ![click to hear](/images/speaker.jpg)
Device producing heat from a heating element and diffusing it in the form of light waves.