Ameer Randolph
Diesel heaters are highly efficient and consume very little fuel. The fuel consumption of a diesel heater depends on various factors, such as the outside temperature, the insulation of the space being heated, and the heater's setting. For example, a 5kW diesel heater's fuel consumption ranges from 0.11 to 0.51 litres per hour or 0.029 to 0.135 gallons per hour. The heater's combustion temperature remains constant regardless of the setting, but the time to reach the desired temperature varies. To ensure accurate fuel measurement, it is recommended to detach the heater's fuel pipe from the tank and immerse it in a jar with a measured amount of fuel.
Diesel Heater Fuel Consumption Characteristics
| Characteristics | Values |
|---|---|
| Fuel consumption rate | 0.11-0.51 L/H (0.029-0.135 Gal/H) |
| Max burn rate | Refer to the data sticker on the driver's door B pillar |
| Fuel efficiency | High |
| Fuel pipe test | Dip the fuel pipe in a jar with a measured quantity of fuel to test consumption |
| Fuel pipe test quantity | 250ml for at least an hour |
| Fuel consumption for a Chinese 5kw heater | 0.4L per hour |
| Pump delivery | 0.2ml per click |
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What You'll Learn
Diesel heater fuel consumption varies with settings
The fuel consumption of a diesel heater varies with its settings, with some sources stating that a diesel heater uses about 0.3 litres per hour on full power, while others state that it uses 0.11-0.51 litres per hour. The fuel consumption also depends on the outside temperature and the insulation of the space being heated. For example, if the heater is set to a low temperature compared to the ambient temperature, it may switch off before reaching full operating temperature.
One source states that a 10-litre tank will last them around a week when using the heater every night on the lowest setting. Another source with a Planer Air 2 D heater states that the manufacturer claims it uses 0.1-0.24 litres per hour, but they have used about 30 litres in 16 hours, most of which were on a low setting.
It is important to note that boat fuel gauges are notoriously inaccurate, and the actual fuel consumption of a diesel heater may vary depending on various factors such as the size and insulation of the space being heated, the outside temperature, and the specific model and settings of the heater.
To improve the accuracy of fuel consumption measurements, one suggestion is to disconnect the heater's fuel pipe from the tank and dip it into a jar with a measured amount of fuel, such as 250ml, and then observe how long the fuel lasts. Additionally, diesel heaters feature an oil pump that precisely controls the fuel inlet for 100% combustion, which can contribute to more efficient fuel usage.
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Fuel efficiency of diesel heaters
The fuel efficiency of diesel heaters is a topic that has been discussed by many users. Several factors determine the fuel efficiency of diesel heaters, including the heater's setting, ambient temperature, insulation, and heater model.
On average, a diesel heater consumes between 0.1 to 0.5 litres per hour, with some users reporting a higher consumption of up to 0.4 litres per hour on the highest setting. One user with a 5kW heater reported fuel consumption rates of 0.11-0.51 L/H, while another user with a Planer Air 2 D heater observed a consumption of 0.1-0.24 L/ph. However, this user also experienced an unusually high consumption of 30 litres in 16 hours, mostly on a low setting, leading to concerns about potential issues with the heater or fuel leaks.
The ambient temperature also plays a role in fuel efficiency. In warmer months, it may be necessary to set the heater to a higher setting to maintain the desired temperature, which can result in increased fuel consumption. Similarly, the level of insulation in the space being heated can impact fuel efficiency. Well-insulated spaces may only require the heater to run on low settings, reducing fuel usage.
Some users have shared tips for optimising fuel efficiency. One suggestion is to pay attention to the max burn rate, which should be indicated on the data sticker. Additionally, regular maintenance is important. It is recommended to run the heater for a full hour at the highest setting once a month to burn off any residual carbonification. This practice can help improve fuel efficiency and the overall performance of the heater.
Overall, while diesel heaters are known for their impressive fuel efficiency, the specific consumption rates can vary depending on a range of factors. User experiences vary, with some reporting low fuel usage and others experiencing higher consumption rates. It is important to consider the specific heater model, ambient conditions, and maintenance practices when assessing the fuel efficiency of diesel heaters.
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Pros and cons of diesel heaters
Diesel heaters are a popular choice for many, especially those who travel in motorhomes or campervans during the winter. They are highly efficient due to diesel's inherently energy-rich composition and the effective combustion process, which minimises energy loss and maximises heat production.
Pros of Diesel Heaters
The advantages of diesel heaters include their high efficiency in generating heat. Diesel fuel has a higher energy content compared to propane or electricity, resulting in more heat production. The combustion process in diesel heaters occurs at higher temperatures and under higher pressure, ensuring more complete combustion and less wasted fuel. This makes them a more efficient choice than propane or electric heaters. Diesel heaters are also convenient due to the wide availability of diesel pumps at petrol stations. Additionally, they have their own fuel tank and can operate without affecting the engine start, making them useful when the vehicle is stationary and the engine is idling.
Cons of Diesel Heaters
One of the main disadvantages of diesel heaters is the potential for fuel additives to fail in maintaining diesel in liquid form during sudden temperature drops. This can result in clogged pipes and operational issues. Additionally, diesel heaters may produce noise and an exhaust smell, which can be a nuisance to neighbouring campers. There are also environmental concerns associated with diesel heaters, as they contribute to carbon dioxide and carbon monoxide emissions, although some users note that diesel heaters produce less emissions than natural gas heaters.
Fuel Consumption in Diesel Heaters
The fuel consumption of diesel heaters varies depending on factors such as the heater's setting, the ambient temperature, and the insulation of the vehicle or space being heated. On average, a 5kW diesel heater may consume around 0.11-0.51 litres per hour, with a higher burn rate during the startup phase. Some users report a consumption rate of about 0.3 litres per hour on full power. When operating at medium power, a diesel heater's fuel consumption can be less than 1 litre per hour, while still raising the temperature inside a car by about 20 degrees Celsius.
The efficiency of diesel heaters is further impacted by the combustion temperature, which remains constant regardless of the heater's setting. However, the time required to reach the desired temperature varies, and in warmer months, it may be necessary to set the heater to a higher setting to ensure optimal performance.
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Diesel heater maintenance
Diesel heaters are known for their fuel efficiency. The fuel consumption of a diesel heater is estimated to be about 0.11-0.51 L/H (0.029-0.135 Gal/H). A 10-litre tank can last around a week when used every night on the lowest setting.
To ensure the diesel heater continues to run smoothly, preventative maintenance is required. Here are some tips for maintaining your diesel heater:
- Splice an inline fuel filter into the fuel lines to prevent debris from entering the burner and to reduce soot buildup. However, this will also require replacing the filter regularly.
- Check the power connections to ensure they are secure.
- Inspect the gaskets and the burn chamber for soot buildup.
- Clean or replace the glow pin and glow pin screen, checking for carbon buildup.
- Ensure the vent hole is not clogged.
- Inspect the ducting, air intake screen, air outlet, combustion air intake, and exhaust for any restrictions or blockages.
- Operate the heater for a minimum of 20 minutes each month to burn off any residual carbonification.
- Maintain the batteries and electrical connections. Insufficient power will prevent the heater from starting.
- Use fuel suitable for the climate and your elevation. Blending used engine oil with diesel fuel is not permitted.
- Keep the fuel fresh and out of sunlight to prevent diesel bugs.
- Clean the fan and fins to remove any dirt, dust, or hair buildup.
- If you need to take the heater apart for a soot cleaning, you will need to replace the gaskets.
- When taking the heater apart, be aware that it can be messy, with carbon buildup.
- If running the heater at high altitudes above 5000 feet, get it adjusted for high-altitude usage to prevent carbon soot buildup.
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Diesel heater alternatives
The fuel consumption of a diesel heater depends on the outside temperature, the heater's setting, and its size. A 5kW diesel heater, for example, consumes 0.11-0.51 L/H or 0.029-0.135 Gal/H. A 10-litre tank will last around a week when used every night on the lowest setting.
Propane Heaters
Propane heaters are an alternative to diesel heaters, although they have some drawbacks. Propane heaters consume oxygen, requiring ventilation, and produce water vapour, which can lead to rust and mould. The Propex and Dickinson Marine propane heaters are recommended alternatives to diesel heaters.
Gasoline Heaters
Gasoline heaters are another option, which, like diesel heaters, can be plumbed into your vehicle's fuel tank or set up with independent fuel tanks. They are designed to heat the cabins of vehicles like campervans, trucks, and expedition vehicles. Companies like Espar, Webasto, and Planar offer gasoline heaters.
Electric Heaters
Electric heaters are another alternative for heating your van. An example is the Mr. Buddy Heater, which is popular due to its ease of use and portability. It can be used with an extended hose to connect to a full-size propane cylinder. For smaller spaces, the compact version, the Little Buddy, is available.
Wood Stoves
Wood stoves are another common method of heating a van.
Butane Heaters
Butane heaters are a smaller and cheaper alternative to diesel heaters, but they require ventilation and have some safety concerns, such as the risk of fuel leakage from canisters.
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Frequently asked questions
The fuel consumption of a diesel heater depends on the heater's setting and the outside temperature. On full power, a diesel heater can use about 0.3 litres per hour, with higher consumption during the startup phase.
If the heater is set to a low temperature compared to the ambient temperature, it may switch off before reaching full operating temperature. This means that in colder climates, the heater may use more fuel to maintain the desired temperature.
Yes, the insulation of the space being heated can also impact fuel consumption. A well-insulated space will require less heat and, therefore, use less fuel.
Some users have reported that diesel heaters can have high fuel consumption compared to other types of heaters, such as gas radiant heaters. However, others have found that diesel heaters are very fuel-efficient, with minimal impact on their fuel gauge even after extended use.
