
Torpedo heaters are a type of heater that can be used to warm large spaces. They can be fuelled by diesel, kerosene, or fuel oil, but kerosene is recommended for cleaner burning and lower maintenance. While diesel can be used in torpedo heaters, it may not be as efficient as kerosene and can produce a strong fuel smell. It is important to ensure that the torpedo heater is well-ventilated when using diesel fuel. Additionally, diesel fuel may not be suitable for all torpedo heater models, and users should refer to the user manual or labels on the machine for specific instructions.
| Characteristics | Values |
|---|---|
| Can diesel fuel be used in a torpedo heater? | Yes, diesel fuel can be used in a torpedo heater. |
| Efficiency compared to kerosene | Diesel produces more heat than kerosene but is less efficient due to stronger fumes and odour. |
| Cost | Diesel is cheaper than kerosene. |
| Long-term use | Kerosene is recommended for long-term use due to cleaner burning and lower maintenance. |
| Safety | Kerosene is safer for indoor use due to lower fumes and odour. |
| Fuel availability | Diesel is more readily available than kerosene, especially in rural areas. |
| Fuel additives | Diesel fuel can be mixed with gasoline or isopropyl alcohol to improve performance and reduce gelling. |
| Fuel type considerations | Always refer to the user manual or manufacturer's instructions for recommended fuel types and safety precautions. |
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What You'll Learn

Kerosene is recommended for torpedo heaters
Torpedo heaters are designed to burn kerosene, and using diesel fuel may require adjustments to the pump pressure to reduce fuming. Kerosene is more refined than diesel, resulting in a cleaner and cooler burn. It is worth noting that some older torpedo heater manuals specifically state to use kerosene only and not diesel. This could be due to the potential for diesel to clog the injector, as it is thicker than kerosene.
In terms of cost, diesel fuel is generally cheaper than kerosene, and it is more readily available, especially in rural areas. However, kerosene may be preferred for its cleaner burn and lower maintenance. Some users have reported using diesel fuel in their torpedo heaters for years without issue, but it is important to ensure proper ventilation to mitigate the stronger odour and potential for fuming.
While diesel fuel can be used as a substitute for kerosene in torpedo heaters, it is important to follow the manufacturer's recommendations and use the fuel specified for the heater. Using the incorrect fuel type can impact the performance, efficiency, and longevity of the heater. It is always best to consult the user manual or seek advice from a licensed technician before using any fuel other than what the heater is manufactured for.
In summary, kerosene is recommended for torpedo heaters due to its cleaner burn, lower odour, and maintenance requirements. While diesel fuel can be used as a substitute, it may not be suitable for long-term use and can impact the performance and longevity of the heater. It is important to prioritize safety and follow the manufacturer's guidelines to ensure the proper use of torpedo heaters.
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Diesel is cheaper and more available
Diesel is a cheaper and more readily available fuel option for torpedo heaters. In some areas, kerosene can be twice as expensive as diesel. Kerosene is harder to find at gas stations, especially in rural areas, and diesel is a more convenient option for many users. Diesel is also a good option for those who live near farms, as they can source off-road diesel from local farmers.
Torpedo heaters can run on diesel, and they can be more efficient than when run on kerosene based on BTU value. However, diesel produces more fumes and an unpleasant fuel smell. The strength of the smell can vary depending on the type of diesel used. For example, one user reported that winter blend diesel did not have a bad smell, while another user found the smell of diesel to be obnoxious.
To reduce the smell of diesel fuel, users can adjust the pump pressure on their torpedo heater. Additionally, diesel fuel tends to cause more water build-up, so regular draining is required. Mixing diesel with gasoline or isopropyl alcohol can also help to reduce gelling and improve flow, but caution is advised when mixing fuels.
While diesel is a viable option for torpedo heaters, it is important to note that kerosene burns cleaner and produces less odor. Kerosene is recommended for a fully enclosed space. Therefore, while diesel is a cheaper and more available option, users should carefully consider the trade-offs in terms of smell and maintenance before choosing it over kerosene.
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Diesel produces more heat but has a stronger smell
Using diesel fuel in a torpedo heater is a viable option, especially if you're in a pinch. Diesel is generally cheaper and more available, especially in rural areas, than kerosene. Torpedo heaters that run on diesel can also be more efficient in terms of BTU value.
However, one of the major downsides of using diesel fuel in a torpedo heater is the strong smell that it produces. Kerosene burns cleaner and produces less odor. If you're using diesel in a torpedo heater and it's fuming, you may need to adjust the pump pressure. This can usually be done by following the instructions in the user manual or on a label on the machine.
Additionally, diesel fuel can cause other problems, such as a build-up of water and crud in the filter, which will need to be drained more frequently. Some people have also reported success in mixing diesel with gasoline or isopropyl alcohol to reduce the viscosity of the diesel and make it more suitable for use in kerosene heaters. However, extreme caution should be exercised when using any type of fuel in a heater that is not designed for it.
Overall, while diesel may produce more heat, the stronger smell and potential for other issues make it a less desirable option compared to kerosene for torpedo heaters.
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Kerosene burns cleaner and cooler
Torpedo heaters that are built for kerosene only should not be used to burn diesel. This is because diesel is thicker and can clog the injector. However, some torpedo heaters are designed to run on diesel, kerosene, or fuel oil, and in these cases, kerosene is recommended for cleaner burning and lower maintenance.
The decision to use diesel or kerosene in a torpedo heater depends on several factors. These include the availability and cost of the fuel, the desired level of cleanliness and odour, and the specific design of the heater. Some people opt for diesel due to its lower cost and wider availability, particularly in rural areas. However, kerosene is preferred by others due to its cleaner burn and less obnoxious smell.
It is important to note that using diesel in a torpedo heater may require adjusting the pump pressure to control the fumes. Additionally, diesel with an anti-gel additive may produce gas. Mixing diesel with gasoline or isopropyl alcohol can help to thin it and prevent gelling, but caution must be exercised when using any fuel other than what the heater is manufactured for.
Overall, kerosene burns cleaner and cooler than diesel, making it a preferred choice for torpedo heaters, especially in enclosed spaces. However, diesel remains a viable option for those with access to good ventilation and those prioritising cost and efficiency.
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Diesel can be used as a substitute with an additive
While some torpedo heaters are designed to run on kerosene, diesel fuel can be used as a substitute. However, it is important to note that diesel fuel will produce a stronger fuel smell, which some may find obnoxious. Kerosene burns cleaner and produces less odor, but diesel fuel is a more cost-effective option and is more readily available, especially in rural areas.
If you choose to use diesel fuel in your torpedo heater, it is recommended to use diesel #1, also known as K1, as a substitute. Diesel #1 is thinner than diesel #2 and flows more easily through the heater's components. Using diesel #2 may result in clogged injectors due to its thicker consistency.
To use diesel fuel in a torpedo heater, it is essential to add an additive to improve its performance and reduce the risk of clogging. Isopropyl alcohol, specifically 91% isopropyl alcohol, is a commonly suggested additive to diesel fuel. However, it is crucial to exercise caution when mixing fuels and additives, as improper mixtures may lead to safety hazards.
Some users have reported success by mixing diesel with gasoline to thin it out before using it in their torpedo heaters. This practice has been observed in farm equipment for many years. One common mixture is one gallon of gas combined with 100 gallons of diesel. This blend helps prevent the diesel from gelling and can be used in torpedo heaters with proper ventilation.
While diesel fuel can be used as a substitute in torpedo heaters, it is important to prioritize safety and follow local regulations. Always refer to the user manual or seek advice from a professional before using any fuel or additive in your torpedo heater.
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Frequently asked questions
Yes, diesel fuel can be used in a torpedo heater. However, it is important to note that diesel fuel may cause a strong fuel smell and that kerosene is recommended for a cleaner burn.
Regular pump diesel or road diesel can be used in torpedo heaters. Diesel #1 can also be used as a substitute for kerosene in kerosene heaters, but it is recommended to add an additive such as isopropyl alcohol.
Some potential disadvantages of using diesel fuel in a torpedo heater include stronger fumes and a less clean burn compared to kerosene. Additionally, diesel fuel may result in more water build-up and a clogged filter.

















