2kW or 5kW diesel heater? If you're wondering between the two common choices of diesel heater sizes—2kW or 5kW—as mentioned above, it all depends on the length of your caravan. A 2kW heater will work well for a vehicle 21 feet or shorter, and a 5kW heater is best for caravans 24 feet or larger.

Additionally, the heater operates on DC 12V input voltage, making it suitable for use with your campervan's leisure power system. Another impressive feature of this heater is its fuel consumption rate, which ranges from 0.16 to 0.5L/H.

Diesel heaters are widely used and considered to be very safe. They include an auto-shutdown if the system temperature exceeds a safe operating level, the same as LPG heaters.

A 2kW diesel heater should be just fine for most vans. If you have a large van which you plan to use in really cold conditions, a 5kW diesel heater may be the better choice. In a house with good insulation, one sizes the heater to be about 1 kilowatt (KW) per 14 cubic metres of living space.