The Best Diesel Heater For Caravans in 2025

When planning your next caravan adventure across Australia, ensuring your caravan stays warm during those chilly nights is essential. A diesel heater is one of the most reliable and efficient heating solutions for caravans.

Why Choose a Diesel Heater for Your Caravan?

Diesel heaters are reliable, efficient, and perfect for keeping your caravan warm. They run on diesel fuel, which is commonly available in Australia, and are more economical compared to electric or gas heaters.

Diesel heaters are favoured for their efficiency and cost-effectiveness, especially for cold weather travel. These heaters are compatible with a variety of caravan sizes, though they are not often included as a standard feature and may require professional installation.

Here are a few key reasons why diesel heaters are a top choice for caravan owners:

1. Heater Efficiency

Diesel heaters are highly efficient, converting most of the fuel into heat, making them a fuel efficient and effective option.

2. Low Heater Running Costs

Diesel is cheaper than gas or electricity, meaning you can heat your caravan for longer without worrying about fuel costs.

3. Heater Safety

The best caravan diesel heaters are safe to use, with the heating unit remaining cool to the touch, reducing the risk of burns or fire hazards.

Key Factors to Consider When Choosing the Best Diesel Heater for Your Caravan

Before diving into specific product recommendations, it's essential to consider a few factors that will influence your choice of diesel heating:

1. Caravan Size

The size of your caravan plays a major role in determining the power (kW) of the diesel heater that best suits your caravan. For caravans up to 24 feet, a 2kW heater should suffice and for larget caravans a 5kW is the optimal choice.

2. Heater Placement

Where you install the heater is crucial. Most caravan owners install the heater under the bed or near an external wall, ensuring it's close to a power source and fuel supply is ideal.

3. Fuel Consumption

The larger the heater, the more diesel it consumes, though a bigger heater often operates on lower settings and thus uses less fuel over time.

Less expensive diesel heaters may use more power, while premium diesel heaters typically draw around 5-10 amps for a few minutes during startup and shutdown, then reduce to between 1 and 3 amps, depending on the specific brand and model.

4. Maintenance

Frequently operating diesel heaters on low power can lead to the accumulation of carbon build-up. Periodically running them on high helps prevent this issue.

2kW vs 5kW Diesel Heater Units: Which Is Better?

Understanding the difference between 2kW and 5kW diesel heaters is key when choosing the best option for your caravan.

2kW Diesel Heater

• Prime choice for smaller caravans and campers (up to 24 feet).
• Runs at higher power to maintain warmth, which helps avoid carbon build-up.
• Produces a steady, comfortable heat without overwhelming smaller spaces.
• More fuel consumption when running on high, but still cost-effective for smaller vehicles.

5kW Diesel Heater

• Better suited for larger caravans (24 feet and longer) or vans with canvas exteriors.
• More powerful but can be too strong for small spaces, leading to discomfort.
• Operates mostly on low settings, resulting in lower noise and less fuel consumption.
• Needs to run on high occasionally to prevent carbon build-up.

Top 3 Diesel Heaters On The Market

Now that we understand the key considerations, let's explore some of the best heaters available for caravans in Australia. Here are three top choices, each catering to different needs and budgets.

1. AU Focus Caravan Diesel Heater 12V 2KW Includes Tank - $649.00

The latest model of a caravan heater is the AU Focus 12V 2 KW and it comes with the following characteristics:

• Best 2kW Diesel Heater for Caravan: This diesel heater is perfect for caravans and campers. It offers reliable performance at a reasonable price, making it a great option for budget-conscious buyers.
• Key Features:
  • 2kW heating capacity, ideal for caravans up to 24 feet.
  • 12V system for easy connection to your caravan’s power supply.
  • Comes with a fuel tank, making it easier to install and operate.
• Why Choose This: It’s affordable, compact, and provides consistent heat without excessive fuel consumption. If you're looking for the best 2kW diesel heater for caravans in Australia, this is a top of the line choce in this price range.

2. AU Focus Caravan Bluetooth Diesel Heater 12V 2KW Includes Tank - $749.00

Let’s also look at the AU Focus Bluetooth 12V 2KW.

• Best 12V Heater for Caravan: This portable diesel heater offers all the benefits of the standard AU Focus model but adds Bluetooth connectivity for easy control via your smartphone, this unit also boasts two temp sensors instead of one for much more accurate room temperature control and finally, an updated control unit with a superior grade wiring loom.
• Key Features:
  • Bluetooth control for easy remote operation.
  • 2kW heating capacity.
  • Efficient fuel usage with minimal noise.
• Why Choose This: The convenience of Bluetooth control is a major plus for those who want to adjust the temperature without leaving the comfort of their bed. It's an upgrade on the standard model, perfect for tech-savvy caravanners, making it the prime choice for the budget-conscious.

3. Webasto Air Top Series 2000STC Single Outlet Standard Control - $1,649.00

Last but not least, the Webasto Air Top Series 2000 TC offers another excellent solution.

• Best Diesel Heater for Large Caravans: Webasto is a renowned brand known for its high-quality diesel heaters. This 2kW model is another solid performer.
• Key Features:
  • 2kW heating capacity, suitable for caravans up to 24 feet long.
  • Single outlet for streamlined installation.
  • Quiet operation and efficient fuel usage.
• Why Choose This: If you're looking for premium performance and don’t mind paying a bit more, the Webasto 2000STC offers reliable heating with minimal maintenance, making it one of the top the range heaters.

AU Focus Diesel Heater vs Webasto Diesel Heater: Which Is Better?

Let’s take a closer look at these highly popular brands and what they are known for to give future users some background before they make their choice.

AU Focus is an Australian company specialising in providing reliable, high-quality diesel heating solutions to keep caravans warm and comfortable. With locally-based operations, the company ensures quick access to replacement parts and after-sales support, minimising delays for customers.

Webasto, headquartered in Stockdorf, Germany, is known for producing sunroofs, electric vehicle chargers, and air-conditioning systems. Their air heaters, designed for the RV market, are praised for their compact design, quiet operation, low fuel consumption, and high heat output.

1. Performance and Efficiency

• AU Focus: Offers great heating efficiency for standard caravans up to 24 feet in moderate climates as seen in Australia.
• Webasto: Webasto heaters, like the AU Focus heater, consume low amounts of diesel and heat up as quickly as the AU Focus, thus providing almost immediate comfort.

2. Quality and Durability

• AU Focus: Made with quality materials, AU Focus heaters have great durability and reliability as long as they are run hot now and again to clear the combustion chamber, this is required for all diesel heaters !
• Webasto: Built with high-quality materials, Webasto heaters like all quality heaters are designed for continuous use.

3. Cost and Value

• AU Focus: Affordable and ideal for budget-conscious buyers, AU Focus offers good value for such a reliable high performance unit.
• Webasto: Though more expensive upfront, Webasto provides long-term value, making it a worthwhile investment for many caravan owners.

Diesel Heater Installation Tips

Once you've chosen the ideal diesel heater for your caravan, proper installation is key to ensuring safe and efficient operation. Here are some essential tips:

Location: Install a diesel heater near an external wall, close to your caravan’s fuel tank and power supply. Popular spots include under the bed or seating areas.

Ventilation: Ensure there’s adequate airflow around the caravan heater and that vents aren’t blocked. This helps maintain air quality and prevents overheating.

Fuel Line Placement: The fuel line should be positioned carefully to avoid kinks and ensure a steady fuel supply.

Electrical Connections: Connect the heater to your caravan’s electrical system securely. If you're not confident in your electrical skills, consider hiring a professional to handle the wiring.

Safety Considerations for Diesel Heaters

Diesel heaters are generally safe, but it’s essential to follow proper safety protocols:

• Carbon Monoxide Alarm: Even though diesel heaters don’t usually emit harmful fumes, it’s a good idea to install a carbon monoxide alarm in your caravan for extra peace of mind.
• Proper Ventilation: Keep air vents open to maintain good airflow inside the caravan. Blocking vents can trap dangerous gases inside, creating a potential hazard.
• Regular Maintenance: Check your heater regularly for carbon build-up and clean by operating the heater at a high temperature for 40 mins or so to ensure optimal performance and safety.

Alternatives to Consider: Gas and Air Conditioning Heaters

Let’s compare diesel heaters with the other two popular alternatives out there to see the advantages and drawbacks of each option.

Gas Heaters for Caravans

Gas heaters require regular access to gas refills, which may not be easily available in remote areas. Proper ventilation is essential to avoid carbon monoxide buildup, highlighting the importance of safety when using gas heaters.

Our most popular gas heater is the Truma Varioheat (in black or cream) and is well regarded for its compact size and ability to heat the space quickly and has some flexibility with installation being able to be installed vertically or horizontally.

>> Shop All Heaters Online at Carac <<

Air Conditioning Heaters for Caravans

Air conditioning heaters offer the dual function of both cooling and heating, making them an all-season solution for caravans. Whether travelling through the hot Northern Territory or chilly Tasmanian winters, these systems maintain a comfortable interior climate. However, they typically require a connection to the electrical grid or a large battery system, which can increase costs. The energy consumption and financial investment should be considered when choosing an aircon heater.

Reliable options for reverse cycle caravan air conditioners are:

• Truma Aventa Comfort Reverse Cycle Air Conditioner - Roof Mounted
• Truma Saphir Reverse Cycle Air Conditioner Kit - Under Bunk
• Finch Australia Houghton 3400 Air Conditioner - Roof Top

Final Thoughts :The Best Diesel Heater For Caravans in 2025

Choosing the right heater for your caravan depends on your vehicle size, budget, and specific needs. The AU Focus Caravan Diesel Heater 12V 2KW provides great value and reliable warmth.

If you prefer advanced features like Bluetooth control, the AU Focus Caravan Bluetooth Diesel Heater is a fantastic option.

No matter which model and type of heater you choose, remember that investing in a good one will ensure your caravan stays warm and cosy during your Australian adventures.

Prioritise proper installation and maintenance to enjoy safe and efficient heating for years to come.