One Source Equipment Rentals has portable, temporary kerosene heaters for rent or sale from Mi-T-M and Heat Wagon. Direct fired heaters move the air through the flame and are the most efficient, and cheapest way to heat a job site or work area. Unlike indirect heaters, direct fired heaters exhaust the fumes (carbon monoxide and water vapor) into the space, so air quality and moisture can be a problem in small areas. These heater can use Kerosene, #1 & #2 Diesel, JP-8, or Jet A, #1 & #2 Fuel Oil as a fuel source. Models range in size from 190,000 Btu’s/h up to 600,000 Btu’s/h.