
The Eberspächer S2 D2L diesel heater is a compact and powerful heating solution for boats, campervans, and motorhomes. With a power range of 1.3 to 5.6 kWh, it offers a high heat output of up to five kilowatts, guaranteeing sufficient power reserves and a high level of thermal comfort. While the manufacturer claims a fuel consumption rate of 0.1 to 0.28 litres of diesel per hour, real-world usage suggests that it uses less than half a litre of diesel per hour at full power and a tenth of a litre per hour on low settings. The Eberspächer heater's low fuel consumption, combined with its ability to run on diesel, gasoline, bio-ethanol, or e-fuels, makes it a versatile and efficient choice for maintaining a cosy environment in various vehicles.
| Characteristics | Values |
|---|---|
| Fuel Type | Gasoline, Diesel, Bio-ethanol, E-fuels |
| Fuel Consumption | 0.1-0.5 litres/hour depending on the model and power output |
| Power Output | 1.3-5.6 kWh, 2-8 kW |
| Features | Automatic altitude adjustment, Easy Start Pro controller, Smart thermostats, Radio remote control, Smartphone control, Voice control via Amazon Alexa |
| Use Cases | Campervans, Yachts, Boats, Cars, Vans, Trucks, Hybrid vehicles |
| Benefits | Quiet operation, Low fuel consumption, High-quality German engineering, Compact design, Precision control, Fast heating, Defrosted windows, Independence from propane heating |
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What You'll Learn

Eberspacher heaters use diesel, gasoline, bio-ethanol or e-fuels
Eberspächer heaters are fuel-operated water and air heaters that can be used in a variety of vehicles, from small passenger cars to heavy commercial vehicles. They are known for their compact design, flexibility, and ability to provide comfortable temperatures quickly.
In terms of fuel consumption, Eberspächer heaters are quite efficient. The Eberspächer Airtronic, for example, has low fuel and electricity consumption, allowing it to maintain the interior temperature for an extended period. It is said to use less than half a litre of diesel per hour at full power and about a tenth of a litre per hour on a low setting. The Eberspächer Hydronic, on the other hand, is integrated into the cooling water circuit, allowing it to heat the passenger compartment and pre-heat the engine, resulting in stable heating performance and low fuel consumption.
Eberspächer heaters use a range of fuel types, including diesel, gasoline, bio-ethanol, and e-fuels. They are designed and tested to work with various fuel types and can be customized to meet specific requirements. This flexibility ensures that Eberspächer heaters can be used in a wide range of vehicles and applications.
The heaters can be equipped with smart thermostats and controllers, which enhance their efficiency and convenience. These devices allow for precise temperature control, scheduling of heating cycles, and remote monitoring of performance. Additionally, the heaters' quiet operation and compact design make them well-suited for use in vehicles, providing a comfortable and unobtrusive heating solution.
Overall, Eberspächer heaters offer a flexible, efficient, and reliable heating solution for various vehicles and applications, utilizing different fuel types to meet specific needs. Their low fuel consumption and ability to maintain temperatures make them a popular choice for many users.
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They are designed for boats, campervans and motorhomes
Eberspacher heaters are designed for boats, campervans, and motorhomes. They are available in a range of models, including the Airtronic D2L, S2 D2L, and D3L, which are diesel-powered and suitable for use in campervans, motorhomes, and caravans. They are known for their compact size, fuel efficiency, and fast heat-up times.
The Eberspacher Airtronic range offers power outputs from 2.2kW to 8kW, allowing users to choose the appropriate size for their vehicle. The Airtronic D2L, for example, is a universal heater that can be installed in almost any vehicle with the correct fuel pickup kit. It is fully programmable and can be controlled via the Eberspacher EasyStart Pro control panel, as well as through the internet, smartphone apps, or smartwatches.
In terms of fuel consumption, diesel heaters typically consume around 0.3 litres per hour for 2kW models and 0.5 litres per hour for 4-5kW models. Smaller diesel heaters may consume as little as 0.1 to 0.28 litres per hour, while larger units can use up to 0.55 litres per hour. For boat owners, one user reported consuming about £50 in diesel for heating each season, considering it a relatively low cost.
Eberspacher heaters are also available with additional features, such as the Airtronic S3 Commercial, which provides fast heat and longer operating times, and the Hydronic S3 Economy, designed for de-icing windows and pre-heating engines. These heaters are compact and quiet, making them suitable for a range of vehicles, including boats, campervans, and motorhomes.
The Eberspacher heater range offers flexibility and convenience for those seeking a reliable heating solution for their boats, campervans, or motorhomes. With their efficient performance, compact designs, and precise control options, Eberspacher heaters are a popular choice for creating cosy and comfortable spaces while on the move.
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They are compact and can be installed in small spaces
The Eberspächer heater is a compact and efficient heating solution for various vehicles, including boats, campers, and motorhomes. Its compact design allows for easy installation in small spaces, making it a versatile option for creating a cosy environment.
The Eberspächer heater's small footprint is a significant advantage, especially when space is limited. Its compact construction ensures that it can be installed almost anywhere in a vehicle without causing obstructions. This flexibility in installation locations means that you can choose the most convenient and suitable spot for your specific needs.
The compact design of the Eberspächer heater also contributes to its efficiency. Despite its small size, the heater is capable of delivering a high heat output of up to five kilowatts. This powerful performance ensures that your vehicle can quickly reach and maintain a comfortable temperature, providing a cosy environment for your travels.
In addition to its space-saving design, the Eberspächer heater offers a range of features that enhance its functionality. For instance, the heater can be controlled with precision, allowing you to adjust the temperature to your exact preferences. This level of control is made possible through smart thermostats and controllers, which can be operated remotely, giving you the ability to manage your heater even when you're not physically present.
The Eberspächer heater's compact size and versatile installation options make it an ideal choice for those seeking a space-efficient heating solution without compromising on performance or functionality. Its combination of compactness and powerful heating capabilities sets it apart, providing a cosy and convenient experience for vehicle owners.
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Eberspacher heaters are quiet, with low fuel consumption
The Eberspacher S2 D2L diesel heater is a quiet and fuel-efficient option for boats and vehicles. While the exact fuel consumption depends on the size of the boat or vehicle, as well as the desired temperature and power settings, Eberspacher heaters are known for their low fuel consumption.
One user reported that their Eberspacher heater used about £50 worth of diesel for heating over two winters, which they considered a reasonable amount. They estimated that the heater used less than half a litre of fuel per hour at full power and a tenth of a litre per hour on a low setting. Another user claimed that their Eberspacher D3l, installed in 1988, "doesn't use much diesel at all".
The manufacturer of the Eberspacher S2 D2L heater claims that it uses between 0.1 litres and 0.28 litres of diesel per hour. This is comparable to other diesel heaters on the market, which typically consume between 0.1 and 0.55 litres of fuel per hour, depending on their size and power output.
Eberspacher heaters are also known for their quiet operation. The company's fuel metering pump technology ensures that the heaters operate with minimal noise, making them a good choice for vehicles where quiet operation is important. The heaters are independent of the engine and the vehicle's own thermal efficiency, drawing in cool ambient or outside air, heating it up, and releasing it into the passenger compartment. This makes them highly efficient and fast in achieving comfortable temperatures.
In addition to their quiet operation and low fuel consumption, Eberspacher heaters offer several other advantages. They are compact and can be installed virtually anywhere in a vehicle. They provide reliable and precise temperature control, allowing users to pre-heat their vehicles and maintain a comfortable climate while driving.
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They are controlled with precision and can be automated
Eberspächer heaters are a reliable way to create comfortable temperatures in vehicles. They can be controlled with precision and can be automated, offering a wide range of user-friendly operating elements. Users can pre-programme operating times and even pre-heat their motorhomes in advance. The heaters can be controlled offline and online, via timer, radio remote control, smartphone, or voice control via Amazon Alexa.
Eberspächer heaters are independent of both the engine and the vehicle's own thermal efficiency. They draw in cool ambient or outside air, heat it up, and release it into the vehicle's interior. This direct heating of the air results in low battery consumption. The heaters can be installed anywhere in the vehicle and are compact, quiet, and efficient.
The heaters are also highly customisable, with power ranges between 1.3 and 5.6 kWh, meaning that several power classes can be covered with just one model. This high-performance variance means that the heater does not need to be frequently switched on and off, avoiding premature wear.
Eberspächer heaters are known for their quiet operation, low fuel consumption, and high-quality German engineering. The Airtronic range includes models that vary in power output from 2.2 kW to 8 kW, 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.
The manufacturer claims that the Eberspächer S2 D2L heater will use between 0.1L and 0.28L of diesel per hour. One user reported that their Eberspächer heater used less than half a litre of diesel an hour at full power and a tenth of a litre per hour on a low setting.
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Frequently asked questions
The Eberspacher S2 D2L diesel heater uses between 0.1L and 0.28L of diesel per hour. The heater draws half an amp once it reaches the desired temperature, which is significantly less than its predecessor.
Eberspacher heaters are known for their low fuel consumption. Diesel heaters with a 2kW model consume around 0.3 litres/hour, while 4-5kW models consume 0.5 litres/hour. Eberspacher heaters are more fuel-efficient than fan heaters, which are not suitable for larger boats.
The fuel consumption of an Eberspacher heater depends on the size of the space being heated and the desired temperature. Additionally, the frequency of use and maintenance can impact the heater's efficiency. Proper installation is crucial, as incorrect installation can lead to increased fuel consumption and safety hazards.
Eberspacher heaters offer several advantages, including compact design, quiet operation, low fuel consumption, precise temperature control, and the ability to run on various fuel types such as gasoline, diesel, bio-ethanol, or e-fuels. They are suitable for different vehicle types and can be used as auxiliary heaters to extend the travel season into colder months.











































