Gas vs Diesel Caravan Heaters: Which Is Better for You?

When it comes to keeping your caravan or motorhome warm, one of the most common questions we get asked at Caravan RV Camping is:

“Which is better for my RV: a gas heater or a diesel heater?”

If you're not quite sure where to start, check out our Complete Buyers Guide to Caravan Heaters for an in-depth overview of all your options, including installation tips, fuel types, and top models for every budget.

Both caravan gas heaters and diesel heaters have their benefits, and the right choice depends on how and where you travel. In this guide, we’ll break down the diesel heater vs gas heater debate and help you choose the ideal heating solution for your setup.

 

Why Diesel Heaters Are Gaining Popularity

Diesel heaters are becoming more popular in the caravan world due to their fuel efficiency and ability to perform in extreme cold. For travellers heading to below-zero destinations, a diesel heater is often the go-to choice.

As more caravanners transition to gas-free setups—thanks to the rise of lithium batteries and 12V induction cooking—diesel heating systems are becoming even more attractive.

 

Caravan Gas Heater vs Diesel Heater: Key Considerations

Before deciding which heater suits you best, consider the following:

• Installation Space: How much room do you have for a heater and fuel tank?

• Fuel Availability: Do you already carry gas bottles or diesel? What’s more convenient on your trips?

• Appliance Compatibility: What appliances are currently installed? Will adding a heater strain your fuel supply?

• Installation Requirements: Are you able (or willing) to DIY, or will it require professional installation?

• Travel Plans: Are you heading to alpine regions, or sticking to milder climates?

• Budget: Don’t forget to include the cost of installation and accessories.

 

Diesel Heaters for Caravans and Motorhomes

Pros of Diesel Heaters

• Shared Fuel Source: If you drive a diesel vehicle, you can often tap straight into the fuel tank. For caravans, a dedicated diesel heater tank like the Lockable Fuel Tank can be added.

• DIY-Friendly Installation: Unlike gas heaters, diesel heaters don’t require a licensed gas fitter. Many handy van owners choose to install models like the Webasto 12V Diesel Heater themselves.

• Fuel Efficiency: Diesel heaters consume minimal fuel—some units like the Eberspacher Airtronic AS3 D2L use as little as 0.10 litres per hour, making them great for extended off-grid stays.

Cons of Diesel Heaters

• Extra Tank May Be Needed: If your tow vehicle isn’t diesel-powered, you’ll need to carry and secure a separate diesel tank.

• Noise: The clicking of the diesel pump can disturb light sleepers if not well insulated or placed carefully.

 

Caravan Gas Heaters

Pros of Gas Heaters

• Already Onboard: If your van already uses gas for cooking, you can simply tap into your existing gas system.

• Quiet Operation: Gas heaters are typically quieter than diesel models. The Truma VarioHeat Eco Gas Heater even features a Night Mode for minimal noise while you sleep.

Cons of Gas Heaters

• Professional Installation Required: Gas heaters must be installed by a certified gas fitter, and an installation certificate is required for warranty and insurance purposes.

• Placement Restrictions: Gas units must be installed through an external wall, away from windows, doors, or under-bed areas.

• Fuel Availability: In remote areas, refilling gas bottles may be more difficult than sourcing diesel.

 

Diesel Heater vs Gas Heater: Which Is Right for You?

Here’s a quick comparison to help you decide:

Feature	Diesel Heater	Gas Heater
Fuel Efficiency	Very high	Moderate
Noise Level	Louder	Quieter
DIY Installation	Yes	No
Cold Weather Performance	Excellent	Moderate
Upfront Cost	Slightly higher	Lower
Fuel Availability	Readily available	Can be harder to source
Ideal For	Frequent travellers, cold climates, off-grid use	Occasional winter trips, quieter operation

 

Final Thoughts: Gas or Diesel Heater for Your Caravan?

If you’re planning winter adventures—like snow trips or alpine stays—a diesel heater is your best bet. Models like the Belief 12V 4kW Diesel Air Heater are affordable, efficient, and designed for large vans. They perform reliably in sub-zero temperatures, ensuring you stay warm no matter the weather.

Diesel heaters also tend to be more fuel-efficient and are easier to refuel in rural areas.

On the other hand, if you’re only doing occasional winter trips, a caravan gas heater may be more convenient—especially if you already use gas for cooking. It’s quieter, lighter, and perfect for short stays. You might even consider a combo unit like the Truma Combi 4E Gas Heater / Hot Water System, which combines heating and hot water in one compact package.

 

Get Expert Advice

Still unsure which heater is right for you? Our experienced team is here to help! Call us on 1800 787 278 to speak with an RV heating expert today. You can also browse our full range of caravan diesel heaters and gas heaters online.

-

DISCLAIMER* Please note, this advice is general in nature and we strongly recommend consulting the product manual and where relevant, a professional installer.

---

Comments (5)

Leave a comment

Title For Comment

Your Comment

Post Comment

Comments have to be approved before showing up