How to choose a diesel boiler for heating a private house

Selecting the ideal heating system for your house is essential, particularly if you want to ensure that your family is toasty and comfortable throughout the winter. Many homeowners find that heating their private homes with a diesel boiler is a dependable and effective solution. However, choosing the best diesel boiler can be overwhelming due to the abundance of options available on the market. We’ll walk you through the most important things to think about when selecting a diesel boiler to heat your house in this guide.

Priority one should be given to determining your home’s heating needs. The size and type of diesel boiler you require will depend on a number of factors, including the size of your home, the amount of insulation it has, and the climate in your area. Your house will remain warm and cozy without wasting energy or increasing your heating costs if your boiler is appropriately sized.

Next, think about how energy-efficient and efficient the diesel boiler models you’re assessing are. In addition to lowering your energy consumption, choosing boilers with high efficiency ratings will eventually result in lower heating costs. Contemporary diesel boilers frequently incorporate cutting-edge features like condensing technology, which increases efficiency by drawing more heat from exhaust gases.

Another important consideration when choosing a diesel boiler for your home is reliability. Especially in the winter months, you should have a boiler you can rely on to deliver reliable heating. Examine various brands and models, go through homeowner reviews, and take into account the manufacturer’s warranty and after-sale support.

Consider the diesel boiler’s installation specifications as well as how well it will work with your current heating system. Make sure your home’s infrastructure can support the boiler of your choice because certain boilers may need special venting or fuel supply arrangements. Make sure the new boiler model is compatible with your current setup if you’re replacing an existing boiler to prevent having to make any expensive modifications.

Finally, when selecting a diesel boiler for your house, don’t forget to account for the total cost of ownership. Although initial expenditures hold significance, it’s imperative to take into account the sustained costs linked to upkeep, repairs, and fuel usage. Long-term savings and peace of mind can be obtained by making a larger initial investment in a high-quality, energy-efficient boiler.

Consider your heating needs Assess the size of your house and heating requirements before choosing a boiler.
Efficiency and fuel consumption Look for a diesel boiler with high efficiency ratings to minimize fuel consumption and save costs.
Choose the right size Ensure the boiler"s capacity matches your heating demands for optimal performance.
Check for safety features Look for boilers with safety features like automatic shut-off to prevent accidents.
Compare brands and models Research different brands and models to find one with good reviews and reliability.
Consider maintenance and service Choose a boiler that"s easy to maintain and find service for to ensure long-term reliability.

Choosing the right diesel boiler for heating your private house is crucial for efficiency, comfort, and cost-effectiveness. Firstly, consider the size of your home and its heating requirements to determine the boiler"s power output. Next, evaluate the boiler"s efficiency ratings to ensure optimal fuel consumption and lower energy bills. Look for models with advanced features like programmable thermostats and modulating burners for precise temperature control and better energy management. Additionally, prioritize boilers with reliable safety features and easy maintenance requirements to ensure long-term functionality and safety. Finally, compare prices and warranties to find a diesel boiler that offers the best value for your investment. By carefully considering these factors, you can select a diesel boiler that meets your heating needs efficiently and effectively, keeping your home warm and comfortable throughout the year.

What are diesel heating boilers

What is it for and how they are used

The following are the primary justifications for selecting diesel-fueled boilers:

  • lack of a gas line at the place of residence;
  • lack of desire in a constant firebox with wood or coal, increased care and cleaning of heating equipment, organizing storage of large volumes of solid fuel;
  • the presence of free access to diesel fuel or the ability to purchase it at a favorable price (from agricultural enterprises, tractor drivers, KAMAZ or bus drivers);
  • Small heated area, within 40-100 m 2 .

The cost of connecting to the gas line, even if it exists in the residential area (permission, project, materials, etc.) is high enough. Simultaneously, the initial costs associated with setting up a diesel boiler for heating are negligible: authorization is not needed, and all that is required is a tank for diesel fuel storage (up to 0.8 m 3 of fuel can be stored directly in the boiler room, and with a heating capacity of 100 kV, this volume is sufficient for nearly the whole heating season).

Device and principle of operation

The sole feature that sets diesel heating boilers apart from gas burners is the turbocharger, which creates the required pressure and splatters fuel throughout the combustion chamber.

Additionally, diesel fuel must be heated beforehand before being sprayed, and specific nozzles are used for this purpose. Boilers using diesel fuel are not energy dependent because such a burner device requires a continuous power source. In domestic settings where there is a high likelihood of power outages, getting a diesel generator is advised in addition.

The universal GAZ-Diesel models, in which the gas transfer from gas to diesel and vice is a simple shift in the burner, are widely used due to the differences in the burner design alone. Models with a replaceable burner can be used temporarily with diesel fuel if connecting to a gas line is planned in the future or if there is free, albeit intermittent, access to diesel fuel.

Otherwise, the operation of domestic diesel boilers follows a standard principle:

  1. The fuel sprayed by the nozzles of the burner is set on fire and burns.
  2. The walls of the combustion chamber is a heat exchanger, inside which the coolant is located.
  3. The heat exchanger transfers thermal energy to the coolant, which naturally or forced (using the circulation pump) circulates the heating system.

The specifics of operation

Even with a closed combustion chamber, the diesel fuel smell from the burners of diesel heating boilers is strong, so a separate room is required for the boiler unit to operate. The room requirements are the same as when installing a gas boiler, that is, in line with MDS 41.2-2000 and SNiP 42-01, specifically:

  • ceiling height – at least 2.5 m with a room area of more than 4 m 2;
  • the presence of an opened window with an area of 0.03 m 2 per cubic meter. a meter of the volume of the room + a structure with a fire resistance limit of at least the REI 45, which protect the boiler room from the neighboring ones;
  • A free space of 1 meter should remain in front of the boiler;
  • doors with a width of at least 80 cm and a lower gap of at least 2 cm;
  • Product ventilation – at least 8 cm 2 for each kW of the boiler power, from neighboring rooms – at least 30 cm 2 /kWh.
  • Connection of the boiler to the mains is carried out by a separate three -core cable (as a rule, it comes in the kit), through a separate RCD (the face value of which is always indicated in the boiler passport).
  • the presence of a separate ground tire in the boiler room, to which the boiler housing is subsequently connected. In general, the grounding of a diesel boiler is carried out similarly to a gas .

The boiler room’s fuel storage capacity is also fixed. When the volume exceeds 0.8 m³, it needs to be removed; however, keep in mind that this also significantly reduces the selection of diesel models because the boiler’s fuel pump needs to have the appropriate absorption power. Diesel is stored in special tanks, which are often made of sturdy plastic and resistant to both external influences and aggressive liquids.

Two options are used for outdoor storage: an underground plastic/metal tank (as a type of gas tank) or a series of plastic tanks connected by a pipeline.

Since diesel fuel’s viscosity increases at +5 °C, making transportation more difficult and placing more strain on the fuel pump, ground storage requires insulation for both the pipeline and the tanks. Placing containers in direct sunlight is not advised. It is also possible to use frost-resistant diesel fuel, but it is not worth the expense.

The most popular and profitable option is subterranean storage because the earth’s crust maintains a constant temperature during both hot and cold weather. Furthermore, compared to the above-ground version, the underground tank presents a much lower fire risk and can often result in higher organizational costs.

Since the majority of diesel boilers have a closed combustion chamber, the combustion products can be removed with a cheap coaxial (lateral) chimney whose diameter matches the boiler pipe’s outbuilding. The only small detail is that the chimney needs to be angled slightly to prevent condensate from re-entering the boiler through the chimney.

Condensate formation is a naturally occurring phenomenon. This phenomenon is also known as the dew point, and it typically occurs 7–10 degrees below the temperature of the outgoing gases (the dew point, for instance, is 78 °C at a smoke temperature of 85 °C). Consequently, condensate forms on the metal parts of the boiler when it cools in the outer portion of the chimney.

Warming the chimney’s exterior can help avoid the formation in addition to setting a chimney at a temperature of two to three degrees. Condensate formation is unique to convection models; in condensation boilers, the temperature of the released gases almost exactly matches that of the atmosphere.

How to select a room thermostat to reduce monthly heating costs by up to 30%

Diesel fuel consumption

One liter of diesel fuel has a specific heat of combustion of 10,300 kcal, or 11.9 kW. This indicates that 0.084 liters of diesel fuel must be burned in order to produce 1 kW of thermal energy. It is also important to take into account the efficiency, which varies between 90 and 95% depending on the model. This indicates that 5–10% of the thermal energy is lost to the coolant.

Total fuel consumption with a diesel boiler is equal to boiler power, kW / 10, based on approximations.

The boiler passport frequently already includes the indications. For instance, the well-known low-cost Kiturami Turbo 13R (13 kW) uses 1.97 kg/hour or 2.25 l/hour and has an efficiency of 86%. This is only possible with constant, maximum-effort work, though. As the boiler is only running about one-third of the time on average in real life, the result can be safely decreased by two to three times.

For instance, based on reviews from homeowners of homes between 100 and 120 m2, the Kiturami Turbo 13R uses between 5 and 7.5 liters of diesel fuel per day, depending on the level of insulation in the home, the temperature, and the amount of DIA use.

Reviews about boiler units working on diesel fuel: advantages and disadvantages

Advantages Flaws
High autonomy-after starting, the boiler absolutely does not require attention and is able to work for weeks, it is only necessary to provide the necessary fuel High cost of fuel – when buying at gas stations or even at wholesale prices, ordering a gas outlet
High reliability-diesel are one of the highest service life, an average of 10-14 years (with a steel heat exchanger) and more (with copper or cast iron) All models are exclusively energy -dependent – for the operation of the boiler it is necessary to ensure continuous power supply
High efficiency-an average of 90-95%, although budget models are still found in 85-89% Increased noise – the noise from the work of the burner is tangible not only with ignition, but also during work
The availability of fuel in any region of the country The need for a separate room for the boiler room is not only because of the noise, but also because of the smell
The simpler and budget installation process, there is no need to obtain permission and approval of the project Almost all models are floor
Almost all models are equipped with protection from overheating and freezing, stopping the circulation pump

How to choose a diesel heating boiler for a private house

Convection or condensation

The way the thermal energy released during combustion is used determines how efficient and consequently cost-effective a diesel heating boiler is.

  • convection -the standard type of boiler in which the coolant is heated due to direct combustion of the fuel, part of the heat goes with the products of combustion (the temperature of the outgoing gases is about 75-110 ° C);
  • condensation – the modern device of the boiler, implying the presence of an additional heat exchanger that extracts heat from condensate, which in turn is formed from combustion products that are extending to the chimney. Thus, it is possible to accumulate almost everything obtained during burning heat (the temperature of the outgoing gases is on average 35-45 ° C).

Condensation boilers are therefore 15-20% more effective; however, their price is 1.5–3 times higher, typically starting at 100,000 rubles. As a result, the amount of fuel burned will determine how profitable this technology is.

Wall or floor

Diesel boilers are typically floor models due to their large burner dimensions and overall boiler unit weight. Additionally, wall models exist, such as the Swedish CTC 950 RU. Nevertheless, we do not currently advise them to purchase them because it is hard to find them for sale, hanging models cost 1.5–2 times as much as floor equivalents, and the service infrastructure is frequently underdeveloped—even in Moscow and Missouri, let alone the surrounding areas.

Single -circuit or double -circuit

Models with a single circuit are made only for heating. When the crane is opened at the consumption point, double-circuit heaters start heating sanitary hot water, which is separate from the technical hot water in the heating circuit. Double-circuit heaters have an additional hot water supply circuit (DHW). Naturally, the decision is based on the boiler’s specifications.

At first look, choosing a single-circuit boiler makes sense because fuel prices are already high. Nonetheless, there is a demonstrably higher demand for two-circuit models, indicating that they remain more effective. The organization in charge of the House of Hot Water supply will require between 15 and 50 thousand rubles, and the cost of electricity, which will be used for heating, will be greater than the cost of diesel fuel. However, the cost of a double-circuit boiler in the budget and average price category is only 5–15% higher.

The material of the heat exchanger

The heat exchanger is an essential component of the boiler; its longevity and efficiency are determined by the materials used in its construction, and replacing it is not always feasible due to the high cost of a complete element. The heat exchanger may therefore be:

  • steel – The simplest, light and inexpensive in production is installed on all budget and some models of the average price segment. The steel heat exchanger is thin and is most subject to corrosion, even in the presence of anti-corrosion coating, it rarely serves more than 12-14 years. Nevertheless, steel heat exchanger is more resistant to temperature extremes and mechanical shocks, heats up quickly (but also quickly and cools).
  • copper – more expensive in production, but more thermal and more resistant to corrosion. The service life of copper heat exchangers is up to 15-17 years (or more).
  • cast iron – the most difficult and thick, practically invulnerable to corrosion. Cast iron heat exchangers heat up for a long time, but also hold heat much longer, their service life is more than 25 years. In addition to severity, the disadvantage is the vulnerability to temperature extremes and mechanical influences, simply put, the alloy is quite fragile (with the exception of expensive alloys of gray cast iron).

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Open or closed combustion chamber

The type of combustion determines the boiler’s environmental friendliness, the amount of ventilation needed, and the chimney type to use: the chamber of combustion:

  • Open combustion chamber – classic and most common in gas and TT analogues, but not always justified for diesel boilers. The air necessary for burning fuel is taken from the room in an open combustion chamber, through the holes in the boiler housing, and the exhaust is diverted through the classic vertical chimney. This means that in addition to organizing a more complex chimney, high -quality ventilation of the room is necessary, it is also worth mentioning that the soot and pollution of the boiler with an open combustion chamber above.
  • Closed combustion chamber – Most of the models are equipped with her. For organizing work, a rather simple and budget coaxial chimney. The air fence occurs through the internal pipe of the chimney, and the exhaust is through the external. The room with this principle of work is less polluted, although the smell of diesel fuel is characterized by the same.


The ratio of fuel consumed to heat released and accumulated by the heat carrier, or the heating boiler’s effectiveness, is known as the utility coefficient, or efficiency. Efficiency is a crucial selection criterion for diesel boilers due to the high cost of each additional fuel liter, even though it is not the most important criterion for gas or solid fuel boilers.

As was previously indicated, the average indicator has a value between 90 and 95%. However, there are top-notch models with an efficiency of 86–89% from well-known manufacturers Kiturami and Navien. They are renowned for their dependability and simplicity of maintenance, have a well-developed service structure, and have incredibly cheap initial costs despite their lower efficiency. They also have readily available spare parts.

Models with an efficiency of less than 86% are not worth the money because their operating costs would be the same as those of electric boilers due to inefficient energy transformation.

The minimum necessary power

The necessary power for a typical unscarried home in the Moscow Region with two brick walls and 2.7-meter-high ceilings is easily determined: one kilowatt for every 10 square meters of heated space. Additionally, we advise installing a 15-20% power supply.

For instance, the minimum power required by the diesel boiler for a 150 m 2 house is 150: 10 * 1 * 20% = 18 kW. Please be aware that using too much power is also not recommended as this will cause the boiler to become clogged more frequently and wear down more quickly.

How to precisely determine the boiler’s required power? Each calculation, formula, and corrective coefficients

Additional criteria

Once the primary criterion has been determined, you can look to features like:

  • the presence of heat and noise insulation – an additional layer of thermal insulation reduces heat loss through the body of the boiler itself and increases the efficiency, and the sound insulation will relieve the noisy operation of the burner, which is especially important if thin walls between the boiler room and residential premises;
  • Automation functionality – the presence of auto -diagnosis, heating modes, the possibility of programming work for a day or a week in advance, the presence or ability to connect an external thermostat, weather dependent control.

Best famous manufacturers and models: characteristics and prices

Kiturami Turbo 13r

The most popular and tried-and-true 13 kW double-circuit diesel boiler made in Korea (other power options are available). The boiler’s secondary heat exchanger (for DHW) is copper, but since it falls into the budget price range, the heat exchanger is made of steel. The model is well-liked despite having an efficiency of 86% and a consumption of up to 1.97 kg/h (2.25 l/h) because of its dependability, extensive automation features, and reasonable price—among the lowest on the market.

The primary benefit is that the factory configuration includes a room thermostat, making it easier and more accurate to modify the temperature regime (which impacts efficiency). Automation also includes freezing prevention mode, autodiagnostics, overheating protection, and multiple heating modes.

Another typical Korean double-circuit boiler with a 17 kW capacity that runs on diesel fuel. steel heat exchanger installed. With a 90% efficiency rate, it uses less energy—1.93 kg/h (2.2 l/hour). The model still has a room thermostat that can be controlled remotely. One major benefit is that the boiler can be programmed to operate at a lower fuel consumption. For instance, the boiler can be programmed to reduce the temperature by up to 15 °C while the owners are away from the house for work, vacation, or other reasons.

Based on owner reviews and installation practices, there have been virtually no consistent malfunctions with these models over a period of more than 6 years.

De Dietrich EFU 22 (B-Control)

Among the top diesel boilers available for heating a private home, particularly one that is larger than 200 square meters. This is a French low -temperature single -circuit model with a capacity of 22 kW. differs in high efficiency of up to 97.3% and long-lasting cast-iron heat exchanger. The boiler meets the strictest environmental requirements and operates virtually silently in real life because of a heat exchanger that removes gases in three different ways and sound insulation. It features useful controls, auto-bank, and an external thermostat connection option (though the thermostat is not included). The hefty weight (185 kg) and expensive price are the only drawbacks.

The boiler requires natural ventilation through a traditional vertical chimney due to its open combustion chamber and atmospheric burner.

Cost: 130,000–135,000 rubles.

Ferroli Atlas 32

Universal Italian single-circuit model with a 32 kW capacity and a changeable burner (gas – Sun M, diesel – Sun G). 94.3% high efficiency and dependability and a long-lasting cast-iron heat exchanger are the main differences. It is possible to connect an external thermostat, and there is protection against freezing and overheating. The boiler features an open combustion chamber but operates with near-silence. Regarding the installation and operation experience, there were no evident flaws.

Cost: 53 500–61 000 rubles + Ferroli Sun G burner (25–29 thousand rubles).

Lamborghini Ax 33 32

Another 32 kW Italian universal single-circuit boiler with a changeable gas-diesel burner. It is renowned for its dependability, features a sleek design, and has the same cast-iron heat exchanger with a three-way gas divert as the previous analog. In short, it is essentially the same. However, its efficiency is only 91.6%, and its functionality is more restricted (although it is possible to connect an external control). There is a layer of thermal insulation beneath the case, and you can see how easy it is to operate and maintain.

Cost: 51–65 000 rubles + Lamborghini Fire burner (3–22 600–27 000 rubles).

Prices: Final table

Model power, kWt To the contours Efficiency, % Price, rub.
Kiturami Turbo 13r 13 Double -circuit 86 43,000
Navien LST-17KG 17 Double -circuit 90 40,000
De Dietrich EFU 22 (B-Control) 22 single -circuit 97.3 116 000
Ferroli Atlas 32 32 single -circuit 94.3 63,000
Lamborghini Ax 33 32 32 single -circuit 91.6 74,000

Installation and connection

Installing diesel boilers follows SP 7.13130.2009 "Heating, ventilation and air conditioning. Fire requirements" and SNiP 41–01-2003 "Heating, ventilation and air conditioning," and is identical to that of their gas or solid fuel counterparts. The minimum temperature required to perform the work is +5 °C.

The boiler’s cauldron is identical to the analogs used in analog installation; the picture below illustrates a traditional connection diagram for a closed type system.

The boiler’s operating instructions always include a description of all overall and connective dimensions along with a thorough installation algorithm; these days, you can find an electronic copy of the instructions for any model on the Internet. Please take note that a certified specialist must perform the installation, adjustment, and first launch. This specialist will also stamp the boiler passport appropriately. Without this, most manufacturers will not honor their warranty.


A characteristic of boiler equipment using any fuel is the buildup of soot inside the chimney and combustion chamber, the accumulation of debris inside the heat exchanger, and the clogging of fuel filters and nozzles. These issues not only cause a 25–30% decrease in efficiency but can also result in more severe malfunctions. Thus, routine maintenance is limited to inspection and cleaning, and it can be done by you or on the advice of specialists while the guarantee is still in effect.

Regularity: If the heat exchanger is at least three to five years old, we advise flushing it every four years and cleaning the boiler once every one to two heating seasons.

  1. Cleaning and flushing the heat exchanger. When used as a coolant, rigid unpeeled water, scale and other salt deposits are formed on the internal walls of the heat exchanger, which reduce its cross section and thermal conductivity. It can be cleaned by mechanically, using a solution of citric or hydrochloric acid or without removing from the boiler, by the method of hydrodynamic flushing. We have already described a detailed algorithm for cleaning the heat exchanger earlier, it is the same for any fuel boilers.
  2. Cleaning the burner, combustion chambers and external walls of the heat exchanger. During operation, soot is formed on these elements, garbage and dust from the room are lingered, a layer at least 0.5 cm reduces the efficiency of more than 10%. The cleaning process also does not differ from analogues, with the exception of another design of the burner (we also described it earlier).
  3. Cleaning or replacing the fuel filter. The fuel filter is not installed in many models of diesel boilers, but it is an extremely important component, since the degree of soot formation and the life of the boiler depends on the quality of fuel purification. And given the quality of the domestic diesel fuel filter of thin and even rough cleaning, their regular cleaning or replacement is simply a necessity.

The following are the most typical effects of irregular service:

  1. Parasitic flame. The logic consists in receiving a signal from the Ionization sensor about the combustion before the board gives the signal to open the fuel valve / operation of the nozzles. To solve the problem, it is enough to clean all the components of the burner. It is rare to get to the electronic fluid control board.
  2. The boiler smokes very much. Classical consequence of clogged nozzles: due to the lack of a fuel filter or in the process of solid formation. In open chambers, combustion can also occur due to the dustiness of the premises or repair work. To solve the problem, it is enough to remove the burner, carefully clean and blow the nozzles.

Making the best diesel boiler choice for your home’s heating is an important choice that will affect your comfort and energy efficiency for many years to come. With so many options on the market, it’s important to weigh a number of factors in order to make an informed decision.

First, determine how big your home is and how much heating it needs. Boilers with greater output capacities are required for larger homes in order to guarantee adequate heating in every area. On the other hand, smaller, more energy-efficient boilers may provide sufficient heating for smaller homes.

Examine the various diesel boilers’ efficiency ratings. While the initial cost of higher efficiency models may be higher, they can result in significant fuel bill savings over time. Seek for boilers that can efficiently convert fuel into heat, as indicated by high AFUE (Annual Fuel Utilization Efficiency) ratings.

The manufacturer’s reputation and dependability are also important factors to take into account. Select brands that have a track record of manufacturing dependable, superior boilers. Understanding the dependability and performance of various boiler models can be gained by reading customer reviews and consulting experts.

Furthermore, consider how your decision will affect the environment. Certain diesel boilers are made with reduced emissions and cleaner operation in mind, making them part of an environmentally friendly heating option. Taking into account the environmental impact of your heating system helps you achieve sustainability objectives and might even get you a discount or rebate.

Finally, don’t undervalue the significance of routine maintenance and expert installation. A diesel boiler that has been installed and maintained correctly will run as long as possible with maximum efficiency and performance. A professional installation and routine maintenance plan can save expensive repairs and guarantee maximum heating efficiency for many years to come.

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