Cadet Garage/Utility Heater - 4000 Watts, 240 Volts, Model# CGH402 [Misc.] Finned Steel Portable Unit Heater 4,000-watt heater at 240 volts creates heat to warm Up to 500 sq. ft. heating area capacity is ideal for a garage or shop Gradually heats area and circulates warm air in your shop or garage Open airflow design reduces debris build up