What is the most fuel efficient diesel heater?

13 Jan.,2025

 

Best Diesel Heater Winter Camping | Planar Distribution Ltd.

Words and photos from 4wd talk

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Winter camping, with its crisp air and serene landscapes, presents a unique challenge: staying warm and comfortable in the great outdoors. For campers braving the colder months, the right diesel heater can transform a frosty night into a cozy retreat.

With numerous options available, the decision often boils down to identifying a heater that not only provides warmth but also fits seamlessly into your camping lifestyle. In the quest for the best, two heaters often rise to the top of the list, each with its own set of strengths and ideal use cases.

Enter the Planar Heaters 4kw Portable Diesel Heater and the Autoterm 2kw Diesel Air Heater, two distinct offerings from the same innovative manufacturer, designed to meet the diverse demands of winter adventurers. Join us as we delve deep into the features, benefits, and ideal applications of these two diesel heaters.

Planar Heaters 4kw Portable Diesel Heater Specs & Features

As a camping enthusiast, if you are looking for a compact yet powerful solution for winter camping, Planar Heaters 4kw Portable Diesel Heater can be the answer. It boasts a heating capacity of 4 kW (13,600 BTU), ideal for warming up sizable spaces. With dimensions of 25 x 19 x 19 inches and a weight of 33 lbs, this heater combines potency with portability.

Efficiency is a key attribute, as it consumes only 0.03 to 0.14 gallons of fuel per hour. Its operational viability at altitudes up to 8,200 feet makes it a reliable companion for mountainous terrains. The airflow rate, ranging between 246 to 590 cubic feet per minute, ensures quick and even heat distribution across large areas.

Durability is assured with its crush-proof and rain-resistant casing. Additionally, the heater operates quietly thanks to its built-in silencer, preserving the tranquility of nature. A wired remote controller enhances user convenience, allowing temperature adjustments without needing to venture outside. For more insights and a comprehensive look at this heater&#;s performance, check out our detailed review here.

Planar Heaters 4kw Portable Diesel Heater Ideal Uses

The Planar Heater 4kw Portable Diesel Heater is a versatile powerhouse, perfect for various winter camping setups. Its remarkable ability to split the heating duct means it can simultaneously warm two tents, making it an ideal choice for larger camping groups or families.

This heater&#;s versatility shines when used with innovative camping trailers like the Second Wind Trailers&#; Freedom Stealth model. The Planar Heater can be conveniently set outside the Stealth, with the duct passing through one of its screened windows, ensuring a warm and toasty interior.

The heater is not only ideal for tents and trailers but also serves as an emergency heat source for vehicles. Whether it&#;s a car, truck, or even an RV, the Planar Heater can provide essential warmth in unexpected situations. Its efficiency and ease of use make it a reliable companion for any outdoor adventure or even during an emergency scenario at home.

Autoterm 2kw Diesel Air Heater Specs & Features

The Autoterm 2kw Diesel Air Heater, a compact and efficient alternative, is designed for smaller spaces requiring consistent warmth. With a heat output ranging from 2,700 to 6,850 BTU, it&#;s ideal for heating areas up to 25 feet. This model is available in both 12V and 24V versions, accommodating various power systems.

Fuel efficiency is a standout feature, as it consumes only 0.10 to 0.24 liters (0.03 to 0.06 gallons) of fuel per hour. Its low power usage, 10 to 29 watts (0.8 to 2.42 amps), ensures minimal impact on your vehicle&#;s battery. Weighing just 15.4 lbs and measuring 12.8 x 4.6 x 4.7 inches, it&#;s built for easy installation and portability. The airflow rate of 34 to 75 m3/h guarantees effective heat distribution.

This heater includes a choice of an analog or digital controller, offering ease of use and precise temperature control. Additionally, it&#;s equipped with a self-adjusting system for high-altitude operations up to 8,200 feet, ensuring reliable performance in various environments. For an in-depth look at this heater, visit our detailed review here.

Autoterm 2kw Diesel Air Heater Ideal Uses

The Autoterm 2kw Diesel Air Heater excels in permanent, hardwired installations. Its small footprint makes it an excellent choice for RVs, where it can be integrated seamlessly without occupying valuable space. In boats, this heater keeps interiors warm and dry, countering the chill and dampness often encountered at sea.

Commercial trucks and vans benefit significantly from this heater, especially in colder regions. It provides drivers and passengers with a comfortable and warm environment, which is crucial for long-distance travel. Its efficient fuel and power consumption make it an economical option for vehicles used frequently.

Additionally, the heater&#;s versatility extends to smaller structures like ice-fishing huts or compact mobile homes, where maintaining a warm, comfortable climate is essential. The choice of controller, analog or digital, offers users the flexibility to adjust settings according to their specific needs.

FAQs

Do diesel heaters need power?

Yes, diesel heaters require power to operate. Depending on the specific model and setup, they typically run on a 12-volt or 24-volt power supply. This power is usually drawn from a vehicle&#;s battery system or a standalone battery source.

How long will a diesel heater run?

Diesel heaters are known for their fuel efficiency. Models such as the Planar Heaters 4kw Portable Diesel Heater and the Autoterm 2kw Diesel Air Heater, can run all night without needing a fuel refill. Their fuel consumption rates are designed to maximize runtime, ensuring continuous warmth for extended periods.

Do diesel heaters run on other types of fuel?

Yes, some diesel heaters are versatile enough to run on kerosene as well as diesel. This feature provides additional flexibility, especially in situations where diesel might not be readily available. However, it&#;s important to check the manufacturer&#;s specifications for each model to ensure compatibility with alternate fuels.

The Ultimate Guide to Campervan Diesel Heaters ()

A van trip is an excellent way to explore new destinations and create lasting memories. However, if the temperature drops significantly, those memories might not be particularly rosy. When the weather's cold, a campervan diesel heater is pure gold. As we discuss in our article on campervan winterisation, a diesel heater is a cost-effective solution to keeping your campervan warm. In our Roaming Home study, we found that of those with heaters, 68% were diesel, whilst a small traditionalist crowd use woodburning stoves. Read more about those here.

In this guide we will go deep on 12V diesel heaters, including a comparison of the best diesel heater brands and an installation guide.

Shane, the founder of The Van Conversion, is a campervan professional dedicated to helping people transform ordinary vans into homes on wheels. He authored Roaming Homeand teaches The Van Conversion Course, guiding many people through their van builds. Shane also writes The Van Conversion Newsletter, where he shares practical tips and insights. After completing two van builds and living on the road full-time since , he is passionate about sharing his expertise with others.

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Did you know you can get a free electrical wiring diagram by signing up for The Van Conversion Newsletter?

Index

To Cut to the Chase: The Best Campervan Diesel Heater

What are the Benefits of a Campervan Diesel Heater?

LPG Heater vs. Diesel Heater

How Does a Diesel Heater Work in a Campervan?

Types of Camper Van Diesel Heater

What Size Diesel Heater Should I Get?

Diesel Heater Carbon Buildup

The Effect of Altitude on a Diesel Heater

How Much Battery do I Need for a Diesel Heater?

How Much Diesel Does a Diesel Heater Use?

The Best Diesel Heaters

Diesel Heater Safety and Regulations

How to Fit a Diesel Heater

Conclusion

To Cut to the Chase: The Best Campervan Diesel Heater

The Eberspacher airtronic diesel heater(Espar in the US)is our most recommended diesel heater. Eberspacher diesel heaters are known the world over for their quiet operation, low fuel consumption, and high-quality German engineering. The Airtronic range includes models that vary in power output from 2.2kW to 8kW, making it easy to choose the right size for your campervan. The Airtronic range also features an automatic altitude adjustment system that ensures efficient operation even at high altitudes.

The Best Diesel Combi Heater

We love the diesel combi air and water heaters from Webasto. Webasto are an excellent UK-based manufacturer who also make highly-regarded diesel air heaters. These combi kits have a high upfront cost on the face of it, but the fact that they combine a water heater and space heater means they end up saving you money whilst simplifying your installation of a hot water system.

The Best Budget Diesel Heater

A high-quality diesel heater from a known manufacturer is virtually guaranteed to work without issue for the lifetime of your campervan. However, they are undeniably expensive. For this reason, many vanlifers opt to install an off-brand diesel heater. Commonly known as 'Chinese diesel heaters' due to their mass-manufacture in Chinese factories, these are much cheaper than a Eberspacher or a Webasto.

The problem isn't so much that each individual heater is unreliable; Chris, who also writes for the website, installed a Chinese diesel heater in his van and has had absolutely no problems with it. Instead, the problem seems to be that due to inconsistent manufacturing quality, you may get unlucky with the particular heater you receive being faulty. We therefore advise going with a Chinese heater which is well-reviewed for customer service and returns, like the one linked above.

What are the Benefits of a Campervan Diesel Heater?

Campervan diesel heaters are a popular choice because they are efficient, reliable, and cost-effective. The three big benefits of campervan diesel heaters over LPG heatersare:

  • Diesel is more readily available at petrol stations than LPG

  • Diesel is a more efficient fuel source and burns at a higher BTU (heat output) than LPG

  • Diesel is safer than LPG as doesn't ignite easily

  • Diesel heaters are generally cheaper than LPG heaters

It's essential to install your diesel heater properly to ensure your safety and comfort while on the road. A poorly installed diesel heater can be dangerous and cause carbon monoxide poisoning or even a fire. This is why it's crucial to follow the manufacturer's instructions and seek professional help if you're unsure about any aspect of the installation process. The diesel heater installation is the most common job that is outsourced to professionals. If you do not feel confident in your ability to do it yourself, getting a professional would be a wise decision.

LPG Heater vs. Diesel Heater

Price of fuel:

LPG is cheaper than diesel

Price of installation:

Premium diesel and LPG heaters are roughly the same price, but there are better budget options available for diesel heaters.

Complexity of installation:

A diesel heater requires a drilled connection to your vehicle's fuel tank and an external exhaust, which turns some people off them. LPG heaters only connect to your internal LPG tank, and their exhaust is composed of harmless water vapour.

Efficiency of fuel and refuelling:

Diesel has a 34% higher heat capacity than LPG, meaning you get more heat from the same amount of fuel. This also means that you have to refill your LPG tank much more often when using it for heating, which can be inconvenient.

Safety:

Diesel is safer than LPG

Time to warm up:

Diesel heater takes longer to warm up than LPG

Noise:

LPG heaters are quieter than diesel

Cleaning:

An LPG heater doesn't need to be cleaned as regularly as a diesel heater

Altitude:

LPG functions better at altitudes above m than diesel

Power consumption:

LPG heaters typicallytake less electricity to run than a diesel heater

The main takeaway that diesel heaters make more noise than LPG heaters and require a fuel tank connection and an external exhaust. A diesel heater's fuel pump and fan makes more noise than an LPG heater, which is almost silent. Most diesel heaters make noise when starting up, and quiet down when they're running. A high-quality heater makes less noise overall, but installation location also affects how audible your heater is.

A diesel heater's more involved installation might be a turn-off, but this becomes irrelevant if you go with a professional installation. Many users find the convenience of burning diesel a major plus, as filling up on diesel is part of driving a van anyway. This is in contrast to an LPG heater, which burns through LPG fairly quickly, necessitating more frequent tank refills or replacements.

How Does a Diesel Heater Work in a Campervan?

A camper van diesel heater works by burning diesel fuel to heat a heat exchanger. The combustion process draws in fresh air and expels combustion gases through an exhaust. The heat exchanger, which consists of a large surface area, heats up as the diesel fuel is burned. A fan then draws in air, which is heated as it passes through the heat exchanger. The hot air is then blown into the living space of the campervan, providing warmth and comfort.

Campervan diesel heaters can be connected to the vehicle's fuel tank or to a separate, auxiliary fuel tank. Most diesel heaters also come equipped with safety features, such as an automatic shut-off if the heater overheats or if there's a problem with the fuel supply. Some models also include a thermostat or remote control, allowing you to adjust the temperature and control the heater from a distance.

Most manufacturers of camper van diesel heaters also make a petrol equivalent.

Types of Camper Van Diesel Heater

There are three types of camper van diesel heaters:

  1. Air heaters

  2. Air and water heater

  3. Hydronic heater

Air Heater

An air heater is the most common type of diesel heater. It is a simple blow heater that heats up air and blows it into your living space.

Combi Air and Water Heater

A combi air and water heater acts as both a blow heater and a water heater, all in one. Webasto make very popular air & water heaters.

Hydronic Heating

The hydronic heater is the most modern (and complicated) type of diesel heater. When we interviewed Colby and Eric at EngineersWhoVanlife.com, they told us they had installed Eberspacher&#;s brand new Hydronic AquaSystem, which has automatic altitude adjustment to m.

A hydronic heater functions as both a blow heater and water heater. But it has one extra piece of functionality which is incredibly cool. It uses the excess heat from the engine once the van has stopped to heat air and water. This means you get free hot showers or heating for quite a while after stopping for the night.

Hydronic works by heating glycol fluid which runs through a calorifier. A heat exchanger is used for hot water, whilst an air matrix is used for hot air. High-tech vanlifers are increasingly using hydronic heating to get underfloor heating in their vans due to its high efficiency.

What Size Diesel Heater Should I Get?

A 2kW diesel heater should be just fine for most vans. If you have a large van which you plan to use in really cold conditions, a 5kW diesel heater may be the better choice. In a house with good insulation, one sizes the heater to be about 1 kilowatt (kW) per 14 cubic metres of living space. In a campervan, we should double or triple this number.

2kW Diesel Heater

  • Less powerful, therefore will need to be run longer to achieve the same results as the 5kW could in a shorter length of time

  • In most vans, a much more comfortable temperature than the high, fast heat of the 5kW

5kW Diesel Heater

  • Generally only needs to run on low due to its power

  • You will run it on low more than the 2kW version, this means you will have to burn off the excess carbon builds up more frequently (i.e. run the heater on high)

  • Have the option to really crank it up in sub-zero temperatures

Diesel Heater Fuel Efficiency and Runtime

Fuel efficiency is a key factor when choosing a diesel heater for your campervan. The amount of fuel consumed depends on several factors, including heater power output in kW, runtime, and external temperatures.

Most diesel heaters operate efficiently by only using the amount of fuel required to maintain a set temperature. As a result, they will typically be more efficient during continuous low-level heating compared to when they are used at full power.

Key Points:

  1. Heater Size: Smaller diesel heaters (around 2kW) typically consume 0.10 - 0.24 liters per hour, while larger units (up to 5kW) can use up to 0.55 liters per hour.

  2. Fuel Efficiency: For a campervan using a 2kW heater like the Webasto AirTop , a full 10-liter tank can last between 41 to 83 hours, depending on the setting.

  3. Runtime Variation: Runtime significantly depends on how much power the heater is running at. Running the heater on low for longer durations will significantly extend fuel use, while running it on high power for shorter periods increases fuel consumption.

Factors Affecting Runtime:

  • External Temperature: Colder temperatures mean the heater will run for longer at higher power, leading to greater fuel consumption.

  • Insulation Quality: A well-insulated van requires less fuel to maintain a warm interior, increasing heater efficiency and reducing fuel consumption.

  • Altitude: At higher altitudes, heaters without altitude adjustment may struggle, increasing fuel consumption as they run less efficiently.

Effect of Insulation on Fuel consumption of Diesel Heaters

Insulation has a significant impact on the fuel efficiency of your diesel heater. In a well-insulated van, a diesel heater typically consumes around 0.2 to 0.3 liters of fuel per hour, as it needs to run less frequently to maintain the desired temperature. In contrast, an uninsulated van could see the heater running almost constantly, using up to 0.5 liters of fuel per hour to keep the space warm. Proper insulation helps reduce heat loss, leading to less frequent heating cycles and lower fuel consumption overall. Read more about how to effectively insulate your van here.

Diesel Heater Carbon Buildup

One of the biggest drawbacks of a campervan diesel heater versus an LPG heater is the buildup of carbon soot that can occur in the heater. This soot puts a lot of strain on the heater over time and needs to be managed carefully. The amount of soot produced by a diesel heater increases when combustion conditions are not ideal. This typically happens when the heater is used at a higher altitude or when there is too much air restriction in the exhaust (exhaust too long, too many bends, etc).

Operation of heater to avoid carbon buildup

  • Avoid firing up the heater for less than 10-15 minutes

  • Avoid running the heater on Low for too long (especially at high altitudes)

  • Before shutting down the heater, "boost" it for 10 minutes (ie. turn it up to high)

The Effect of Altitude on a Diesel Heater

Altitude can have a significant effect on the performance of a camper van diesel heater. At higher altitudes (>m), the air becomes less dense, which can cause a reduction in the heater's ability to produce heat. This is because the heater's combustion process relies on oxygen from the air to burn the diesel fuel and create heat.

As the altitude increases, the oxygen levels in the air decrease, which can lead to incomplete combustion and reduced heat output. This can cause the heater to run less efficiently and potentially even shut off entirely - this is due to the excess carbon build up that happens at altitude.

You can sometimes buy a heater which has built-in altitude adjustment, though frequently it comes at an additional cost. Alternatively, you could purchase a high-altitude kit for your campervan diesel heater. In some cases, manual modifications are required to adjust the fuel-to-air ratio to ensure proper operation of the diesel heater at higher elevations.

Sino Air Conditioner contains other products and information you need, so please check it out.

How Much Battery do I Need for a Diesel Heater?

The power consumption of a diesel heater is typically measured in watts or amps, and can range from around 5W for a small heater to 50W or more for a larger heater. Most diesel heaters have a low power consumption mode for when the heater is not actively heating the space, which helps to save power and extend the life of the battery. Diesel heaters can draw 8-12A on start up.

For a more detailed look, here's a table showing battery consumption for some common diesel heater models during operation:

Diesel Heater Model

Startup Power (Amps)

Continuous Power (Amps)

Power Consumption Over 24 Hours (Ah)

Eberspacher Airtronic D2

8-12A

0.8-1.0A

~20 Ah

Webasto AirTop STC

9-10A

0.7-1.2A

~18 Ah

Planar Autoterm 2D

8-9A

0.5-1.5A

~22 Ah

Chinese Diesel Heater (Generic)

8-10A

0.7-1.5A

~24 Ah

Key Takeaways:

  • Startup Power: The initial draw is high due to the glow plug heating up the combustion chamber.

  • Continuous Power: Once the heater stabilizes, it consumes far less power, primarily to run the fan and fuel pump.

  • Total Power Usage: Over a 24-hour period, these heaters consume around 18-24Ah, making them a manageable load for most van battery systems.

How Much Diesel Does a Diesel Heater Use?

Diesel air heaters have a fuel consumption of around 0.3 litres/hour for 2kW models, and 0.5 litres/hour for 4-5kW models.

As we saw earlier, smaller diesel heaters (around 2kW) typically consume 0.10 - 0.24 liters per hour, while larger units (up to 5kW) can use up to 0.55 liters per hour. This means that for a campervan using a 2kW heater like the Webasto AirTop , a full 10-liter tank can last between 41 to 83 hours, depending on the setting.

The Best Diesel Heaters

Eberspacher Airtronic, Webasto AirTop, and Planar Autoterm are three of the most popular brands of diesel air heaters for campervans.

Eberspacher Airtronic

The Eberspacher diesel heateris known for its quiet operation, low fuel consumption, and high-quality German engineering. The Airtronic range includes models that vary in power output from 2.2kW to 8kW, making it easy to choose the right size for your campervan. The Airtronic also features an automatic altitude adjustment system that ensures efficient operation even at high altitudes.

Webasto AirTop

The Webasto diesel heateris another German brand that has been around for over 75 years. Their AirTop range includes models with power outputs ranging from 0.9kW to 5kW. The AirTop is known for its low noise level.

Off-brand Diesel Heater

When it comes to buying a camper van diesel heater, you may be tempted to opt for a cheap Chinese diesel heater instead of a more reputable one like Eberspacher or Webasto. While Chinese diesel heaters can be more affordable, there are some drawbacks to consider. Chinese brands may have lower build quality and may not meet safety standards in some regions. They may also be more prone to malfunction or breakdown over time, which could be a serious safety hazard if you're relying on your heater to keep you warm in cold conditions. Finally, they may not have a warranty or support like the other options.

With that being said, these are incredibly popular and many people have used cheaper diesel heaters for many years without any problem. The problem isn't so much that each individual heater is unreliable; Chris, who also writes for the website, installed a Chinese diesel heater in his van and has had absolutely no problems with it. Instead, the problem seems to be that due to inconsistent manufacturing quality, you may get unlucky with the particular heater you receive being faulty. We therefore advise going with a Chinese heater which is well-reviewed for customer service and returns, like the one linked above.

Here's a price breakdown of the five most popular diesel heaters:

Diesel Heater

Price Range (USD)

Features/Notable Benefits

Potential Drawbacks

Eberspacher Airtronic D2

$900 - $1,200

Quiet operation, reliable in cold climates, automatic altitude adjustment

High upfront cost

Webasto AirTop STC

$900 - $1,100

High fuel efficiency, compact, low noise, German-engineered

Expensive

Planar Autoterm 2D

$500 - $700

Economical, reliable in cold climates, wide power range

Noisy, less refined build quality

Chinese Diesel Heater

$120 - $250

Very low cost, widely available, simple installation

Lower quality control, reliability issues, louder

Truma Combi 4E

$1,600 - $2,000+

Combined air and water heating, quiet operation, energy-efficient

Very expensive, large unit size

Diesel Heater Safety and Regulations

Below, I have supplied some key safety information for a typical 12V diesel heater - note that specifics may differ depending on the manufacturer. I have also included some guidance from the BS EN : standards, which discuss LPG regulations (which will also be useful here).

The information provided in this guide is provided solely as a high-level resource for information, not as a single source of truth. I am not a certified gas fitter, nor do I hold myself out to be. The information provided below is a collection of publicly available information that I have consolidated.

Here are some things you should be aware of:

  • The Heater must be installed inside the campervan.

  • The heater must not be used when the vehicle is in motion

  • The exhaust and inlet must be routed outside the van

  • The exhaust should be somewhere where it will not be sucked back in by the air inlet or through a window

  • The exhaust needs to vent out from the edge of the van. If not vented away from the edge, carbon monoxide could collect under the van and be sucked back in the air intake.

  • The exhaust pipe should slope down to prevent condensation build-up on the inside of the pipe

  • The air intake pipe should also slope down to protect the pipe from rain

  • Never trim the air intake or exhaust pipes.

  • The exhaust and air intake should be at least 50cm away from each other to prevent recirculation of bad air.

Please make sure you install a carbon monoxide alarmin your van. This is critically important.

Campervan Diesel Heater Tips and Tricks

  • You will need to prime the fuel pump the first time you start up your diesel heater. Follow manufacturer&#;s instructions for information on how to do this (normally on the control panel)

  • You can expect the heater to be smoky the first time you fire it up. Whether it&#;s burning off excess fuel from over priming or extra oxygen that was sitting in the lines, it&#;s completely normal

  • Diesel heaters are well known for the ticking noise they produce. You can buy a silencer to reduce this noise. Install it at a 45 degree angle for maximum benefit

  • Running a diesel heater on a low temperature is not great for the heater, especially at high altitude. If you are running the heater on low heat, run it on high for 10 minutes before turning it off

  • A diesel heater should be serviced every one to two years depending on frequency of use

Smart Thermostats and Controllers

Smart thermostats and controllers can greatly enhance the efficiency and convenience of your diesel heater in a campervan. These devices allow you to precisely control the heater&#;s operation, schedule heating cycles, and even monitor performance remotely. With smart controllers, such as the Eberspacher EasyStartor the Webasto MultiControl, you can set your heater to turn on automatically before you return to your van, ensuring it's warm and comfortable. They also offer features like temperature regulation and eco-modes, reducing unnecessary fuel consumption by maintaining a more consistent temperature, rather than allowing large fluctuations.

Smart controllers often come with remote access via apps or SMS, allowing you to start or adjust the heater from a distance. For instance, you can pre-heat your van while you're still out hiking, saving time and energy. This reduces manual adjustments and helps optimize battery and fuel use over time. Additionally, smart thermostats can integrate with altitude sensors for better performance at high altitudes where oxygen is thinner.

How to Fit a Diesel Heater

Here is the secret to a bomber 12V diesel heater installation: Read the manual. Installation differs between models and a poor installation will only lead to headache down the road. This chapter gives an overview of the installation and is not meant to be a replacement for the instruction manual. As always, if you're unsure about anything, ask a professional to install your heater for you.

Step 1: Mount the camper van diesel heater

Before you start, decide on the best location for your diesel heater. This will depend on factors such as the size of your campervan, the layout of your interior, and the type of heater you have chosen. Consider mounting the heater in a location where it won't take up too much space, but also where it can provide maximum warmth to the living area. The heater should be installed in a well-ventilated area, away from flammable materials and heat-sensitive components.

A 12V diesel heater is commonly installed under the front seats, on the opposite side to the sliding door. This can reduce the noise from the heater if it's behind a bulkhead. It is also a little safer due to the separation from the back. Whatever you do, mount it inside something and keep it away from the head of your bed to minimse the effect of the noise it makes.

To mount the heater, follow the manufacturer's instructions carefully. Some diesel heaters come with a mounting plate that needs to be bolted to the floor, while others require brackets or screws to attach to the interior of the campervan. Make sure that the heater is securely fastened and positioned correctly, and leave enough space around it for proper ventilation and maintenance.

Step 2: Install the Fuel Line

Option 1 - Primary tank: Drop the diesel tank down on jacks to access the lid and install the fuel line. The method of installing the fuel line differs depending on the van. The Ford Transit is relatively straightforward as it has an auxiliary fuel port pre-drilled (you can purchase a connector kit to attach to it). Other models of van may not be so straightforward and will require you to drill your own port (drain the tank first).

Option 2 - Auxiliary tank: Use a small, separate diesel container which you can install inside your van. If you're installing a separate fuel tank, make sure to choose a location that's easily accessible for filling and draining.

Fuel pump & filter: You will need to install a fuel pumpto ensure that the diesel fuel reaches the heater properly. You should install the pump at an angle between 15°-35° (differs between models). Install the fuel pump as close as possible to the fuel tank. You should also install a fuel filterbetween the pump and the fuel source to remove any contaminants from the fuel which could break the pump or heater. These components will be included if you buy your heater in a kit.

When securing the fuel pump, place a thick rubber gasket between the pump and the affixing structure. This will minimise any vibration from the fuel pump. &#;Quick fists&#; are commonly used to reduce vibration.

If you are using an auxiliary tank, you may need to drill a hole in the tank and install a quick disconnect fittingin the tank.

Step 3: Install the diesel heater exhaust pipe and air intake

Once the fuel line is installed, it's time to install the diesel heater exhaust pipe. The exhaust pipe should be routed outside the campervan (facing towards the rear of the van) to vent the exhaust gases safely. Make sure to follow the manufacturer's instructions to ensure that the exhaust pipe is properly installed and secured. Make sure not to install the exhaust beside the door to avoid breathing in fumes.

You will need to drill through the floor to install the diesel heater exhaust pipe and air intake. You will need to attach a bi-metal holesawto your drill. Apply some metal paintto the bottom of the van where you just drilled to prevent rusting. Use a low RPM, tapping and cutting fluid, and a pulsating action when using the holesaw to avoid melting anything.

The combustion intake and exhaust length should be less than 2 metres. Don&#;t bend these pipes too much as it restricts air movement. The smallest bending radius is 50mm and total bend is 270°.

Install the air intake facing the opposite direction to the diesel heater exhaust pipe. It should face down slightly to prevent any rain water from getting stuck in the pipe. There should be at least a 10cm gap between the exhaust and air intake. The end of the exhaust should not exit under the vehicle; the diesel heater exhaust pipe must end outside the vehicle edge.

You can optionally install a muffler (silencer)on the exhaust to reduce noise.

Step 4: Route the diesel heater ducting

Route the diesel heater ducting around your van to evenly distribute the heat. Make sure in the inlet for cool air is not beside a heat outlet.

Step 5: Wire the 12V Heater

Wire the 12V diesel heater to your 12V batteries. You will also need to connect the heater's control panel and pump.

Step 6: Test the campervan diesel heater

After completing the installation process, it's crucial to test the campervan diesel heater to ensure that it's working correctly. Turn on the heater and check for any signs of leaks or malfunctions. You should also test the heater's thermostat and timer to ensure that they are working correctly.

If you encounter any issues, consult the manufacturer's instructions or seek advice from a professional. Some common issues include air in the fuel line, improper wiring, or a clogged exhaust pipe.

Conclusion

You should now feel equipped to choose a diesel heater for your campervan. If you're curious about alternatives, check out our articles on LPG heaters and woodburning stoves. If you've decided on a diesel heater, check out our highly recommended models from Eberspacher, Webasto, and Prijesse.

If you're still confused about all of this, check out our Gas and Heating Systems Masterclass for an in-depth, step-by-step guide to the entire system.

Don't forget to subscribe to The Van Conversion Newsletterfor everything you need to get started with your own van conversion. We'll send you a free wiring diagram when you join.

If you're looking for some guidance with your van conversion, you might be interested in our book, Roaming Home, or in our online course, The Van Conversion Mastery Course. You'll learn directly from our founder Shane how to convert a van into your dream home - no prior experience needed.

The company is the world’s best Portable Diesel Air Heater supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.