40,000 Btu portable Kerosene forced-air heater with thermostat (needs 120V electrical outlet). Runs up to 10 hours on a full 3 gallon tank. Instant heat right out of the box - Just fill tank and plug in! Quickly circulates heat with high-capacity fan. Operates in extremely cold temperatures. Flame out control system shuts heater down in the event of loss of flame or lack of fuel. Uses low-cost Kerosene, #1/#2 Diesel fuel and Fuel Oil, JP-8 fuel or Jet A fuel. Exclusive patented Hot Surface Ignition (HSI). Provides quieter operation, cleaner burning and less maintenance. HSI Smart Start Technology.