Load

• A standard (small) quartz infrared heater may use 12.5 amps as its maximum draw when the heater is initially turned on and is going through its warming-up process. Once the heater is warmed up and putting out heat, the amperage draw is reduced to 6 amps to 7 amps.
  
  

Cost

• A quartz infrared heaters' wattage is the main determination of cost, as electricity is measured in kilo-Watt hours. Although, the wattage of infrared space heaters will vary, a 1,000 watt infrared heater will use the same wattage and demand on your electric utility as a 1,000 watt ceramic space heater. Therefore the operating cost is comparable, if not exactly the same as a traditional space heater.
  
  

Variations

• Naturally, different models that are comparatively larger or smaller will have a different draw for wattage. As a result, larger models will have a larger British thermal unit (BTU) output and can heat a larger space more quickly and efficiently than smaller models. Use a power monitor for your heater, if you want to know exactly how much energy is being used.