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Diesel Heater
diesel heating, diesel heating system, Webasto, Eberspächer, fuel-powered heater, diesel air heater, parking heater, Espar heater, Autoterm
A diesel heater is an independent heating system that burns diesel fuel (drawn from the vehicle's fuel tank) to produce warm air for the living area, without requiring mains electricity or gas.
Popular for autonomous winter camping — runs quietly (40–60 dB), economically (0.1–0.5 L/h) and safely: combustion gases vent outside through a dedicated exhaust. Leading manufacturers: Webasto (Germany) and Eberspächer (Airtronic D2/D4). Budget alternatives (Vevor, Autoterm, Defa) are available from €150–300. Installation requires penetrating the floor or wall and connecting to the diesel fuel tank.
FAQ
Is a diesel heater safe to use in an enclosed space?
Yes — when correctly installed. Combustion gases are vented outside through a dedicated exhaust pipe, and combustion air is also drawn from outside. The living space air is not contaminated. The only risk is a faulty or blocked exhaust, so fitting a CO detector is strongly recommended as additional protection.
How does a diesel heater differ from a gas heater?
A diesel heater draws fuel from the vehicle's tank — no separate gas cylinders needed. A gas heater such as the Truma Combi heats both air and water in one unit but depends on having gas supply. Diesel heaters are more popular in DIY campervans; gas Truma units are standard in factory motorhomes.
How do I choose the right diesel heater output?
For a campervan or small motorhome (5–15 m³) a 2 kW unit (Webasto Air Top 2000 STE or Eberspächer Airtronic D2) is sufficient. For a 6–9 m motorhome down to −20°C you need 4 kW. Good insulation (mineral wool or PIR board) lets you use a lower-output heater and save fuel.