Best Diesel Heaters for Camper Vans and RVs: 7 Ranked for 2026

The VH08 PRO earns the top spot on features that matter every night. Its listing includes the exhaust pipe and muffler, so you are not hunting for parts. It has an altitude mode, a remote and, on this PRO version, Bluetooth app control.

It is also the only heater here with a published noise level: 39 dB, stated for thermostat mode. It weighs 8.6 kg (about 19 lb) and carries a 1-year warranty. The gap is fuel data. With no L/h figure, you cannot check the 5 kW claim with the 10 kWh-per-liter rule, although 5 kW is a normal rating for this class.

The OAH-B2 is the most transparent listing here. It publishes both ends of its fuel range, 0.15 to 0.61 L/h (0.04 to 0.16 gal/h). At the top end, 0.61 L/h holds about 6.1 kW of energy, so 5 kW of heat is believable.

The low end matters more in a van. At 0.15 L/h the heater makes at most about 1.5 kW, which suits a small, insulated build. The 4-gallon tank lasts several nights, and the listing says it can also feed from the vehicle tank. It has an altitude mode and a remote. What it lacks is any warranty, noise or power-draw figure.

The Apollo-P2 is the simplest way to add diesel heat without drilling. Tank, heater and controller sit in one portable case, and warm air goes in through a duct. The listing declares 5 kW, a 5 L tank, a remote and a 1-year warranty.

The rule for all-in-ones is strict: the box stays outside, or its exhaust is routed outside. Never run it with the exhaust inside the vehicle. On paper it lacks fuel use, weight and noise data, so you cannot verify the 5 kW figure or plan fuel precisely.

The PF80VB packs the most control options into an all-in-one box: a remote, an LCD panel and a Bluetooth app. The listing also includes a mains adapter, so you can run it from a household outlet in a garage or on a hookup.

Its weak point is the headline number. It declares 8 kW but publishes no fuel consumption and no tank size, so the 10 kWh-per-liter check is impossible. Even if it is right, a van rarely needs 8 kW. It weighs 10 kg (about 22 lb) and states no warranty.

The JB-017 is the bare-bones option. At 4.5 kg it is the lightest heater here, and its 9 L tank sits between the all-in-ones and the OBAKL. It has a digital display with a voice mode and ships with a muffler.

It scores lowest of the plausible units because the listing is thin. There is no remote, no warranty and no fuel consumption, so the 8 kW figure cannot be verified. The listing mentions the muffler but not the exhaust pipe itself, so check what is in the box before you plan the install.

On features alone, the DH004 would rank near the top: a toolbox case with a 5 L tank, a remote, an app and the longest warranty here, 2 years. Its VanThermia score reflects those features.

The problem is honesty. The listing sells it as 8 kW, but its own maximum fuel use is 0.45 L/h. That holds about 4.5 kW of energy (0.45 × 10 kWh), so 8 kW of heat is impossible. Treat it as a heater of roughly 4 kW or less. That is still enough for most vans, but it should not win a ranking built on believable specs.

This is a different animal: a 24 V combi that heats air and, according to the listing, water as well. The lowest setting, 0.11 L/h, holds only about 1.1 kW of fuel energy, which suits a small space on mild nights.

The top claim does not hold. At 0.51 L/h maximum, the fuel carries about 5.1 kW, so 7 kW of heat cannot happen. Other claims on the listing are also overstated. It works only on 24 V, has no remote and states no warranty. Buy it for a 24 V truck, not for its rating.