Quartz Infrared heater consist of a quartz heating element which is similar in functioning like a light bulb. But they are optimised to produce as much infra-red as possible, and less light. Quartz Infrared Heaters are not recommended for Home heating purposes. This is because they have a higher fire potential as they radiate to function. They are good for workshops, garages, barns etc as they portray an effect that is similar to standing near a bonfire. They have no thermostat function.