What Is A Diesel Heater?
A gasoline or diesel heater is a small combustion chamber that uses diesel as fuel to create a reaction that puts out a large amount of heat while still being small, lightweight, and efficient.
Related Product: We use a reliable Power Queen 100Ah Lithium Battery (click to view on Amazon) to power the diesel heater in our RV.
They are very popular in camping applications like vans and truck campers and considered to be very safe when installed properly.
Diesel heaters are also very fuel efficient when compared to propane heaters and the fans don’t use nearly as much power as a traditional RV heater.
Very low power usage is part of what makes these small heaters so popular for boondockers who use solar power.
See Also: Portable Vevor Diesel Heater (All-In-One) Review & Setup
Originally, diesel heaters were made by two German-based companies, Webasto and Eberspächer (which is the owner of the Canadian-based company Espar).
Webasto and Espar still make some of the highest quality diesel heaters for campers today, but other companies making similar diesel heaters that are getting some traction in the diesel heating world.
In this post, I’ll review some of the best diesel heaters by Webasto, Espar, and some of the newer companies as well. Hopefully, the information will help you decide on what kind is best for your camper or van.
See Also: Best Small Portable Propane Heater For Indoor & RV Use
Summary (links to Amazon)
- Best Overall: Eberspacher Espar Airtronic S2 Diesel Heater
- Best Budget: Vevor 8KW Diesel Heater
- Most Portable: Vevor All-In-One Diesel Heater
Best Overall
Best Budget
Most Portable
Last update on 2024-10-11 / Affiliate links / Images from Amazon Product Advertising API
Best Diesel Heaters For Campers Reviews
1. Webasto Air Top 2000 STC Diesel Heater
Webasto diesel heaters are highly regarded in the camping world for their quality construction and durability.
A standout feature of the Webasto heaters is their waterproof components, which were originally designed for marine use but are perfect for vans and RVs. This is especially important for campers in humid climates, where moisture can cause rust.
The Webasto Air Top 2000 STC is a compact option, with the 2KW (3,000-7,000 BTU) model measuring just 21.5 x 14.9 x 8.4 inches and weighing 5.7 lbs.
One of Webasto’s main advantages is its quick startup. Unlike other diesel heaters that take around a minute for the glow plugs to warm up, the Webasto heats up faster and uses only about 120 watts for a few seconds at startup.
It then runs efficiently at 14 to 29 watts, depending on the fan speed, making it perfect for extended use with a deep cycle RV battery.
See Also: Best Heated Water Hoses For RV Campers, Barns & Livestock
The heater kit, available from Butler Technik, a licensed Webasto dealer, includes a user-friendly MultiControl panel with an on/off button, dial, and LCD screen for easy adjustment of heat and fan settings.
It also offers the convenience of setting timers up to seven days in advance. Pairing it with a remote room temperature sensor is recommended for better control.
Webasto heaters are designed to be quieter than many competitors, making them a great choice for those sensitive to noise.
The kit includes all necessary electrical and exhaust components, a fuel pump, and a fuel line, though a fuel tank standpipe must be purchased separately if connecting to a vehicle’s fuel tank.
Webasto heaters perform well up to altitudes of 7,220 feet. For those with gasoline vehicles, a separate fuel tank will be needed to run the diesel heater.
The Webasto Air Top 2000 STC (click to view on Amazon) is a reliable, fuel-efficient, and versatile option for boats, vans, campers, tiny homes, and more, offering both quality and quiet operation.
PROS
- High Quality Construction
- Compact Size
- Efficient Heating
- Quick Startup
- Low Power Consumption
- Low Noise Levels
- High Altitude Compatible
- User Friendly Controls
CONS
- Very Premium Option
- No Fuel Tank Included
- No Standpipe Included
- No Phone App Control Features
- Advanced Installation
2. Eberspacher Espar Airtronic S2 Diesel Heater
The Espar Airtronic S2 is a top-tier diesel heater known for its reliability and efficiency, making it a great choice for campers, van dwellers, and full-time RVers.
This compact heater delivers impressive heating power for its size, offering 2.2kW (2,900-7,500 BTU) of heat output.
It measures 21.5 x 14.9 x 8.4 inches and weighs around 17 lbs, making it suitable for small spaces.
Like the Webasto, the Espar Airtronic S2 offers a quick start-up, using approximately 120 watts of power for a few seconds during ignition. It then operates at a low power consumption range of 6 to 31 watts, depending on the fan speed.
The heater comes with an LCD control panel and a knob, allowing for easy adjustment of heat levels, fan speed, and temperature. It also includes a programmable 7-day timer for convenience.
See Also: Mr. Heater Little Buddy Reviewed & Tested For Camping
A standout feature of the Airtronic S2 is its built-in automatic altitude adjustment, which enables the heater to function efficiently at altitudes up to 10,000 feet without needing additional parts.
This feature sets it apart from many other diesel heaters that require separate components for high-altitude operation.
The Espar diesel heater is also designed to run quietly, with a fuel pump and motor that minimize the typical ticking noise associated with budget diesel heaters.
The package includes most of the essential components needed for installation, except for an external fuel tank or standpipe, which can be purchased separately if required.
For those seeking a premium, well-built diesel heater with excellent features, the Eberspacher Espar Airtronic S2 Diesel Heater (click to view on Amazon) is one of the best overall options available today.
PROS
- Compact & Powerful
- Efficient Power Usage
- Automatic Altitude Adjustment
- Quiet Operation
- User Friendly Control Panel
- Comprehensive Installation Kit
CONS
- Very Premium Option
- No Fuel Tank Included
- No Standpipe Included
- No Phone App Control Features
- Advanced Installation
3. Vevor 8KW Diesel Heater
The VEVOR 8KW Diesel Air Heater is a versatile and budget-friendly heating solution designed for a variety of vehicles, including RVs, trucks, boats, and trailers.
It has an impressive heat output of 8KW (27,000 BTU), making it suitable for larger spaces or very cold environments.
The heater operates on 12V power and uses only 0.18–0.48 liters of diesel per hour. This makes it an excellent option for those looking to stay warmth without draining the fuel tank too quickly.
The VEVOR heater features a simple LCD control panel for easy adjustments of heat levels and settings. The controller allows users to set a timer and adjust the temperature, making it user-friendly and convenient for various heating needs.
It also comes with a remote control, which is almost a must-have, especially in cold conditions where you may not want to get up to adjust settings manually.
On top of all that, it also connects to a smartphone app via Bluetooth. The app is extremely user friendly and allows you to control the heater up to 98 feet away.
See Also: Best Portable Electric Heated Blankets For Camping
One of the standout features of this heater is its low noise operation. It includes a silencer and an upgraded fan to reduce the sound level, which can be especially helpful for light sleepers or those in quieter environments.
Additionally, the VEVOR diesel heater is built for safety and efficiency, with features like an overheat sensor and a highly efficient combustion chamber that ensures clean and stable combustion.
The VEVOR 8KW Diesel Air Heater (click to view on Amazon) comes with a complete installation kit, including an integrated 10-liter fuel tank, exhaust pipe, air intake pipe, wiring harness, and mounting brackets.
However, you’ll need some mechanical experience or professional help to install it properly, especially if they are not familiar with vehicle heating systems and wiring.
This diesel heater is a fantastic budget alternative to more premium diesel heaters, offering a good balance of power, efficiency, and noise control.
PROS
- High Heat Output
- Efficient Fuel Consumption
- User-Friendly Controls
- Smartphone App
- Complete Installation Kit
- Safety Features
CONS
- Not Watertight
- Budget Parts
- Advanced Installation
4. Hcalory Diesel Heater”
The HCALORY 5KW Diesel Air Heater is a compact and efficient way to heat vehicles like RVs, trucks, cars, boats, and trailers.
This diesel heater delivers a heat output of 5KW (17,000 BTU), making it suitable for small to medium-sized spaces where reliable warmth is needed.
Operating on a 12V power supply, it is an economical choice for those looking to maintain a comfortable temperature without excessive power or fuel consumption.
The heater comes with a digital LCD control panel that allows users to easily adjust temperature settings, fan speeds, and set timers, providing convenience and flexibility for different heating needs.
Additionally, the HCALORY diesel heater includes a remote control, allowing you to operate the device from a distance, which is particularly useful on cold nights and mornings.
See Also: 6 Best Camping Wool Blanket Reviews For Tent, RV & Van Use
One of the notable features of this diesel heater is its integrated muffler, designed to minimize noise and create a more quiet environment compared to other diesel heaters.
It also has an upgraded fuel pump and combustion chamber, ensuring efficient fuel use and a more stable, cleaner burn, which reduces overall operating costs and emissions.
Designed for safety and longevity, he Hcalory has overheating protection, voltage regulation, and an energy-saving mode to optimize performance and reduce wear.
The heater comes with a comprehensive installation kit, including a 10-liter fuel tank, exhaust pipe, air intake pipe, wiring harness, and mounting hardware.
This makes it easier for users to install it themselves, but some mechanical knowledge is still necessary.
Overall, the HCALORY 5KW Diesel Air Heater (click to view on Amazon) is a solid option for those looking for an affordable yet reliable heating solution for their RV or van. It offers a good balance of power, efficiency, and noise control.
PROS
- Good Heat Output
- Efficient Fuel Usage
- Low Noise Operation
- User-Friendly Controls
- Complete Installation Kit
- Basic Safety Features
CONS
- No Altitude Adjustments
- Not Watertight
- Budget Parts
- Advanced Installation
- No Phone App
5. LF Bros 5KW All-in-One Diesel Heater
Now that we’ve talked about the diesel heaters with exterior fuel tanks, I’m going to mention a few all-in-one versions that come with the fuel tank built into the heater.
The LF Bros 5KW Diesel Air Heater is a versatile portable heating option designed for RVs, trucks, trailers, boats, and other off-road vehicles.
With a heating capacity of 5KW (17,000 BTU), it is suitable for small to medium-sized spaces, providing reliable warmth in cold weather conditions.
Operating on a 12V power supply, this heater is both efficient and effective, making it a good choice for those who need a dependable heating solution on a budget.
The heater comes equipped with an upgraded LCD control panel, which allows for easy adjustment of temperature, fan speed, and timers.
Additionally, the LF Bros diesel heater includes a remote control for convenient operation from a distance, adding an extra layer of flexibility, especially in cold weather.
See Also: How To Add A Fuel Filter To A Portable Diesel Heater
One of the main features of the LF Bros 5KW Diesel Air Heater is its compact design with everything built into a metal box.
The heater is made to be quiet and efficient, with a low-noise fuel pump and optimized combustion chamber to minimize both noise and fuel consumption.
Unlike any other diesel heater in this review, the LF Bros has multiple power options ranging from 12 volt, 24 volt, and even 110 volt. A standard wall plug and adapter is included for 110 volt operation.
The LF Bros heater also focuses on safety and durability, incorporating features like overheating protection, a built-in temperature sensor, and voltage regulation to prevent damage and ensure consistent performance.
The heater comes with a complete installation kit, including a 10-liter fuel tank, exhaust pipe, air intake pipe, mounting brackets, and wiring harness, making installation straightforward and a little less advanced than regular diesel heater installation.
Overall, the LF Bros 5KW Diesel Air Heater is a well-rounded choice for those looking for a diesel heater that’s movable. All-in-one solutions are perfect for transporting from place to place.
You can set it up outside your RV when you’re camping, use it in the garage at home or even put it in your car to pump in some extra heat.
PROS
- Efficient Heat Output
- Compact & Portable Design
- Quiet Operation
- User-Friendly Controls
- Complete Installation Kit
- Basic Safety Features
- Simple Installation
- 3 Power Source Options
CONS
- No Phone App
- No High Altitude Adjustments
- Budget Parts
- Not Watertight
6. Vevor All-In-One Diesel Heater
Check out my full review and testing of a similar Vevor diesel heater in this post here
The VEVOR 8KW Diesel Air Heater with Bluetooth is a powerful and versatile portable heater designed for RVs, trucks, boats, and trailers.
With an impressive heating capacity of 8KW (27,000 BTU), this heater is ideal for larger spaces or very cold environments, providing reliable warmth.
The heater operates on a 12V power supply and is has efficient fuel consumption, using only 0.18–0.48 liters of diesel per hour, making it an economical choice for prolonged use.
A standout feature of this VEVOR diesel heater is its Bluetooth compatibility, which allows users to control the heater remotely using a smartphone app.
This feature adds convenience by enabling users to adjust temperature settings, set timers, and control fan speeds from a distance, without needing to use the control panel directly.
See Also: Portable Diesel Heater RV Storage Compartment Install
The heater also comes with a digital LCD control panel for easy manual operation and a remote.
The VEVOR portable diesel heater is designed for quiet operation, incorporating a silencer and an upgraded fan to minimize noise levels.
Additionally, the heater includes safety features like an overheat sensor and an efficient combustion chamber that ensures a clean and stable burn, contributing to both safety and fuel efficiency.
The package comes with a comprehensive installation kit, including an integrated 10-liter fuel tank, exhaust pipe, air intake pipe, wiring harness, mounting brackets, and all necessary hardware, making it easier to install the heater.
Overall, the VEVOR 8KW Diesel Air Heater with Bluetooth is a modern, high-powered, and user-friendly portable heating solution that offers both efficiency and convenience, making it a great choice for those needing reliable heat in RVs and colder climates.
PROS
- High Heat Capacity
- Phone App Controls
- Efficient Fuel Consumption
- Quiet Operation
- User-Friendly Controls
- Complete Installation Kit
- Basic Safety Features
- Automatic Altitude Compensation
CONS
- Not Watertight
- Budget Parts
What To Look For In A Diesel Heater For Vans & Campers
Fuel Type
Diesel heaters use diesel fuel but if your vehicle uses gasoline, you can get a similar gasoline fueled heater.
That way you don’t have to install a different fuel tank that’s just for the heater.
Gasoline heaters can be hard to find but Webasto makes a good version (click to view on Amazon) that has mostly the same features as the diesel version reviewed in this article.
There is also a gasoline heater made by Eberspacher Espar (click to view on Amazon) if you prefer their heaters.
No matter what kind you get do not use the wrong kind of fuel.
Using gasoline in a diesel heater and vice versa can have catastrophic results.
Room For The Exhaust
There are a few different styles of van and RV diesel heaters in this review.
Most of them have two air vents in the bottom that require fresh air from outside and the heat output in the front.
You will need to be able to run the two lines on the bottom to the outside of your van or camper.
You can use the insulated venting tubes that are often included with the installation kits but you may need something longer if you plan on putting the heater in the center of your RV.
Heat Output
A small van or truck camper won’t need a very big diesel heater to keep it warm in reasonable temperatures.
Even a big RV usually doesn’t need anything bigger than a 5kW (17,000 BTU) heater.
But if you camp in super cold climates you may want to go with something a little more powerful to keep you warm at night.
It also depends on the insulation inside your camper and how many slides it has.
Slide outs are very difficult to insulate and usually the more slide outs an RV has the hard it is to keep warm.
Proper Installation
While the idea behind installing a diesel heater in a van is pretty simple it can take certain skills and knowledge to do it right.
There are tons of sources online you can use to install a diesel heater yourself.
If you aren’t familiar with running gas lines or exhaust pipes you may want to hire a professional to do it for you.
Dealers and RV repair shops should be able to help you and even a heating and vent expert can give you advice on how to direct all of the vents and lines.
Quality Fuel Pump
Diesel heaters rarely fail but when they do it’s normally the fuel pump that’s having issues.
If it’s not pumping enough fuel, the heater should just turn off.
If it starts pumping too much, the overheating safety should kick in but if it doesn’t things can go bad really fast.
It’s normal for the fuel pumps on diesel heaters to make slight clicking noises.
I recommend checking them regularly to make sure they are in good working condition at all times.
Control Panel Settings
Diesel heaters can put out some serious heat, and you don’t always need it to run constantly all night long.
Some heaters just have a simple knob you turn to adjust the temperature.
If you are planning on using this at night or while you are gone for the day getting a diesel heater that has a timer or a temperature control feature is going to be a lot nicer.
It will save power and keep your van or camper from getting way too hot and wasting resources.
More controls often mean more self diagnostic and safety features which is something you absolutely need if you are going to be using any kind of heater in your living space.
See Also: EcoFlow Delta Max 2000 Tested & Reviewed For RV Camping
My Pick For Best Diesel Heater
Eberspacher Espar Airtronic S2 Diesel Heater
Even though there are some fantastic budget options out there I have to go with the Espar Airtronic for my best diesel heater overall.
The quality of the parts and design are just a few reasons to get this heater for your van or camper.
The control panel has a lot of the features you want like a thermometer, temperature settings, a 7 day timer, and self diagnostics.
The main thing I like about the Espar Airtronic is the automatic altitude adjustment feature.
If you travel around the United States in a van or camper you are going to come across all kinds of elevations.
One time we went from 5,000 feet, to 9,000 feet, to sea level in just a few days.
You want your heater to work for you no matter where you are and not having to adjust the elevation settings manually is going to make travel a little easier.
See Also: Can You Put A Composting Toilet In An RV/Camper/Van?
Frequently Asked Questions About Diesel Heaters
What is a diesel heater and how does it work?
A diesel heater is a heating device that uses diesel fuel to generate heat for vehicles, boats, and small spaces like RVs.
It works by drawing in air from the surroundings, heating it through combustion in a chamber, and then blowing the warm air into the desired space.
The heater burns diesel in a controlled environment, making it an efficient and safe way to heat small areas.
Are diesel heaters safe to use in RVs and vans?
Yes, diesel heaters are generally safe to use in RVs and vans as long as they are properly installed and maintained.
They are designed with safety features like overheat protection, flame sensors, and ventilation systems to prevent the buildup of carbon monoxide.
Proper installation, including adequate ventilation and following the manufacturer’s instructions, is crucial to ensure safety.
How much fuel does a diesel heater use?
A standard sized 5kW or 17,000 BTU diesel heater will use around 0.17 gallons on high per hour, and it will normally only use around 48 watts of power as well.
Diesel heaters are a fantastic energy efficient way to heat a van or camper.
Even if you aren’t boondocking they are often more powerful than electric space heaters and can be a great affordable way to heat your living space.
Are diesel heaters safe?
Diesel heaters are safe when installed properly with the correct safety precautions in place.
A well built diesel heater will have an overheat cut off and self diagnostic features.
When compared to propane heaters they are considered safer since you aren’t dealing with high pressure gas that is toxic if leaked.
With that being said you should check all of the different parts of your diesel heater on a regular basis.
Make sure it gets serviced after the recommended number of run hours to keep it in a safe working condition.
Many people even sleep with their diesel heaters on. After installing it, I recommend running it during the day first to make sure nothing goes wrong.
Is it expensive to run a diesel heater?
When compared to other heating alternatives a diesel heater in a van or RV is relatively cheap.
Because of the low power usage, it’s a good option if you are a boondocker who uses batteries and solar power.
What batteries are best for running a 12 volt diesel heater?
Diesel heaters don’t use a ton of power and their starting watts are fairly low. Normally no more than 140 watts.
I recommend using some kind of deep cycle RV battery like this (click to see review) or even a lithium battery (click to see review).
If you boondock you should be able to keep your batteries charged with a solar panel like this (click to see post) so you can run your diesel heater when you need to.
With that being said even a standard 12 volt car battery would be able to run a diesel heater for a good amount of time.
Do diesel heaters smell?
During the initial startup, you may smell a little bit of a diesel smell but nothing should linger longer than the first couple of minutes.
If you smell diesel fumes turn off your diesel heater and check the fuel lines to make sure there are no leaks.
Can I use a diesel heater at high altitudes?
Yes, many diesel heaters can be used at high altitudes, but they may require an altitude adjustment feature or an additional high-altitude kit.
This is because air pressure decreases at higher altitudes, which can affect combustion efficiency.
Some high-end models, like Webasto, Espar and some Vevor heaters, come with built-in altitude adjustment capabilities that automatically regulate the air-fuel mixture for efficient operation up to certain elevations.
How noisy are diesel heaters?
Diesel heaters vary in noise levels depending on the model and the quality of the components.
Most modern diesel heaters are designed to operate quietly, with features like mufflers and noise-dampening technology.
High-end models, such as Webasto and Espar, are known for their quieter operation, while some budget models may produce a ticking sound from the fuel pump.
No matter what kind of diesel heater you get it will be way quieter than a propane RV furnace.
Do diesel heaters need regular maintenance?
Yes, diesel heaters require regular maintenance to ensure safe and efficient operation.
Maintenance typically involves checking and cleaning the combustion chamber, replacing fuel filters, and inspecting the exhaust and air intake systems for blockages.
It’s also important to run the heater regularly, even during warmer months, to keep the system in good working order and prevent fuel gelling or blockages.
Can a diesel heater run off the vehicle’s fuel tank?
Yes, many diesel heaters can be connected to the vehicle’s main fuel tank, provided the vehicle runs on diesel.
This setup is convenient as it eliminates the need for a separate fuel tank. However, a standpipe or fuel line kit may be needed for installation.
For vehicles that run on gasoline, a separate diesel tank will be required to operate a diesel heater.
How long can I run a diesel heater on a full tank?
The runtime of a diesel heater on a full tank depends on the tank size, heater’s fuel consumption rate, and usage settings.
For example, a 10-liter tank with a heater consuming 0.25 liters per hour can run for approximately 40 hours.
Heaters with lower consumption rates or larger tanks will provide longer run times.
Are diesel heaters more efficient than propane heaters for RVs?
Diesel heaters are generally considered more efficient and cost-effective than propane heaters, especially for RV use.
Diesel is often cheaper and more readily available in remote areas, and diesel heaters typically have lower fuel consumption rates.
Additionally, diesel heaters are known for their efficient combustion process, resulting in less moisture production inside the RV compared to propane heaters.
Can I use a diesel heater while driving my RV?
Yes, many diesel heaters are designed to be safe to use while driving.
However, it’s essential to ensure that the heater is securely installed and that all exhaust and intake systems are functioning correctly to prevent any fumes from entering the vehicle.
Some diesel heaters are specifically designed to maintain a comfortable temperature inside the cabin while on the move.
How difficult is it to install a diesel heater in an RV?
The difficulty of installing a diesel heater in an RV depends on the specific model and your mechanical skills.
Some models come with comprehensive installation kits that include all necessary components, making the process straightforward for those with basic DIY skills.
However, for those unfamiliar with vehicle modifications or fuel systems, professional installation is recommended to ensure safety and proper operation.
For easier installation get an all-in-one portable diesel heater like the last two in this review.
What size diesel heater do I need for my RV?
The size of the diesel heater needed for an RV depends on the size of the RV and the typical climate conditions in which it will be used.
Smaller RVs and vans often require heaters with a capacity of 2KW to 5KW, while larger RVs or those used in colder climates may need a more powerful 8KW heater.
It’s important to choose a heater that can efficiently heat the entire space without excessive fuel consumption.
Have any more questions about diesel heaters for vans and campers? Leave a comment below.
