Diesel Heater Runtime and Cost
Estimate diesel use and monthly heating cost from heater kW, hours, nights and fuel price. Fast liters, € per night, and € per month.
How accurate is the 0.12 L/kWh figure?
It’s a planning average for small diesel air heaters. Real numbers vary by brand, altitude, and how often the unit runs at full vs low power. Use it as a baseline, then compare to your own measured burn over several nights.
I know my heater’s L/h — how do I use that here?
Adjust the **kW** value until the displayed **L/h** matches your manual or real-world figure. The rest of the monthly and nightly calculations will then align with your heater.
Does this include battery power for the fan/glow plug?
No. The calculator focuses on **diesel consumption and cost**. Electrical draw is small but not zero; plan a margin in your 12 V system for starts and fan runtime.
What’s a reasonable number of nights per month?
Winter: 10–20 nights if you chase cold. Shoulder seasons: 4–10. Enter your own pattern—the tool scales linearly with nights and hours.
Should I run a separate tank for the heater?
If you burn through **>1×20 L** per month or want clean bookkeeping, a small dedicated tank can help. Otherwise, occasional jerry cans are fine—just track storage and refilling.