Jan 06, 2022 · Diesel Air Heaters. January 31, 2022. January 6, 2022 by Rob. This is a 8KW (~ 27,000 BTU) Chinese-made Diesel Parking Heater. It’s an “all-in-one” heater because the heating unit, fuel pump, fuel tank and control panel are already assembled and mounted inside a steel case. Most of these heaters are sold without the case so it’s easier