Boiler on diesel fuel consumption

It’s critical to have effective insulation and heating in your house not just for comfort but also for controlling energy expenses and lessening environmental effect. Boilers that run on diesel fuel are a common option among the different systems that are available for many households. Throughout the year, these boilers provide dependable heating, particularly in areas with severe winters. But for homeowners hoping to efficiently maximize their energy use and budget, knowing how much diesel fuel these boilers use is essential.

In order to generate heat that is subsequently distributed throughout the house to provide warmth, diesel fuel boilers work by burning diesel. The boiler’s efficiency and size, the house’s insulation, and the temperature settings are some of the variables that affect how much diesel fuel these boilers use. Because of this variability, it’s critical for homeowners to understand how various factors can affect fuel consumption and, in turn, their energy bills.

A crucial factor to take into account is the boiler’s efficiency. With high efficiency ratings, modern diesel fuel boilers can turn a larger percentage of the fuel into usable heat. Over time, lower fuel consumption and lower heating costs can be achieved by making an investment in a newer, more efficient boiler. Furthermore, regular cleaning and servicing of the boiler can help maximize its efficiency and further reduce fuel consumption.

The house’s insulation has an impact on fuel consumption as well. Properly insulated homes are better at retaining heat, which eases the boiler’s workload and cuts fuel consumption. By upgrading windows and doors, adding insulation to walls and attics, and sealing drafts, homeowners can increase insulation in their homes. Homeowners who upgrade their insulation improve the overall comfort and energy efficiency of their dwelling while also reducing their dependency on the boiler.

Fuel consumption is also significantly influenced by temperature settings. Even though it might be tempting to turn up the thermostat in the winter, doing so uses more gasoline. It’s critical to strike a balance between efficiency and comfort. By adjusting temperatures according to occupancy and the time of day, programmable thermostats can help ensure warmth when needed and reduce fuel waste during periods of inactivity.

Making educated decisions about their heating systems is possible for homeowners when they are aware of the variables affecting the amount of diesel fuel that boilers use. Homeowners can minimize fuel consumption and environmental impact, which will help to minimize energy costs, by investing in energy-efficient boilers, upgrading home insulation, and optimizing temperature settings.

Consider a diesel boiler as a heating option for a private house

It is not common to use diesel fuel for home heating. primarily as a result of diesel fuel’s high cost. However, because they are simple to connect and operate, liquid fuel boilers are popular in areas that are not connected to the main gas supply.

Pros and cons

Private home heating with diesel boilers offers several benefits. greater than making up for the high cost of fuel. Their operational process is fully automated, and their efficiency has reached 85%. They don’t require coordination for installation or connection, unlike gas equipment.

  • Availability of fuel, even for remote regions not connected to the gas mains;
  • after switching on, the regulation of the heating process is automatic, the burner is switched on and off depending on the temperature of the coolant in the system;
  • for installation and connection of diesel equipment does not need approval, you do not have to collect a package of documents and obtain permission from supervisory authorities;
  • there is no need to install complex smoke removal and ventilation systems with a high price, you can use a coaxial chimney, led out through the wall in any place;
  • The price of diesel boilers for heating a private house and related equipment is not too high.

They do have certain drawbacks, though the majority are easily fixed:

  • because of noise and odor it is necessary to arrange a boiler room;
  • for storage and uninterrupted supply of fuel will have to install a tank connected to the boiler with a pipeline;
  • diesel boilers are energy-dependent, so in regions with frequent interruptions it is necessary to provide a backup source of electricity;
  • the price of fuel – diesel oil – is rather high, and its consumption is significant.


It has a very basic device:

  1. The combustion chamber is equipped with a turbocharged burner.
  2. During combustion of the fuel mixture, the walls of the chamber formed by the heat exchanger, heated.
  3. The heated coolant enters the heating system, gives heat to the room, and then returns to the boiler.
  4. The gases formed during combustion are discharged outside with the help of a chimney.


The set of required parameters, which include capacity, heat exchanger material, boiler type of combustion, and hot water supply requirement, determine which model is best.

Choice of capacity

The most crucial factor, which is dependent on fuel economy and heating efficiency when selecting the right option. The technical documentation for each boiler specifies the power in kilowatts that is used in diesel heating equipment. There is a unique methodology for calculation that considers all the subtleties.

The area of the heated private house is more convenient for the average consumer to focus on; any model’s primary characteristics also include this indicator. Generally speaking, you can use a straightforward formula in temperate climates: divide the total area of all the house’s rooms by ten to find the necessary boiler output. This value should be increased by 20–30% for colder climates.

The simplified power calculation method is only applicable to simple-layout homes with ceiling heights up to three meters. In multi-story buildings with heated staircases, it is more accurate to base calculations on room volume.

Calculation of fuel consumption

The boiler capacity directly affects how much diesel fuel is consumed. The calculation is as follows on average: boiler output in kilowatts divided by 10 yields the fuel consumption in kilograms per hour in heating mode. Depending on the level of thermal insulation in the home, the consumption is lowered by 30–70% when using the temperature maintenance mode. In a private home of average size, the average consumption of domestic heating boilers is 0.5–0.9 kg.

Material of the heat exchanger – what depends on it?

Steel or cast iron can be used for the heat exchanger in diesel boilers. There are benefits and drawbacks to both materials:

  • boilers with steel heat exchanger are lighter and cheaper, react faster to temperature changes, are more resistant to localized overheating, but they are highly susceptible to corrosion;
  • stainless steel heat exchanger is durable, is not afraid of the effects of aggressive compounds, has a uniform heat distribution, while the price for them is slightly higher;
  • the price of boilers with cast iron heat exchanger is higher, they are heavier, are characterized by increased fragility and can crack at sudden temperature changes, but they are more resistant to corrosion and durable when operating in an aggressive environment;

Diesel fuel burns and produces a lot of soot that contains sulfur compounds. When they mix with condensate, they create weak acids that quickly corrode boiler components and cause failure.

A boiler return system that is installed correctly can prevent condensate; this will be covered in the corresponding section.

Single or two-circuit?

In addition to heating a home, diesel boilers can also heat water for household purposes. We refer to these boilers as two-circuit boilers. A 20% increase in design capacity is required when selecting a two-circuit boiler; otherwise, it might not be adequate for effective heating and water heating.

It is important to determine whether purchasing a two-circuit model is feasible before making a purchase. If hot water consumption is minimal, it is preferable to install a separate water heater rather than complicate the heating system.

Method of heat generation – what is better?

Heat carrier diesel boilers are conventional type and condensing boilers according to the heating principle. utilizing condensate energy in addition. Although they cost more, they are more fuel-efficient and require less.

Whether a replacement burner is necessary?

Given their striking design similarities to gas burners, diesel burners can be used in the same boiler thanks to a wide range of models available on the market. Their replacement is so easy that it can be done independently at a convenient time, saving the need to call a master.

Selecting a model with interchangeable burners is preferable if the diesel boiler is being bought as a temporary heating source and will eventually be connected to the gas mains.

Installation and connection

As previously stated, setting up a diesel boiler does not require coordination; all that is needed is to outfit the boiler room and fuel tank, install the heating system, and then connect the heating unit.

Arrangement of the boiler room

Boiler chamber. It is preferable to do it in a different soundproofed room because of the noise and smell. The dimensions and placement of the boiler room should permit installation within the room or close to the diesel fuel tank with access roads in place. The entire estimate will cost more if the fuel pipeline turns out to be longer than anticipated because a boiler with a large suction capacity and additional insulation costs will be needed.

The following guidelines can help with boiler room arrangement for gas boilers:

  • area – 4 m² per boiler, plus the area for installing the fuel tank;
  • the height of the room – from 2.2 meters and higher;
  • door opening width – at least 0.8 m;
  • the boiler room must be equipped with windows with an area of at least 0.3 m² for every 10 m³ of volume in the room;
  • it is obligatory to arrange supply ventilation, from the outside (from the street) – at least 8 cm² for each kW of boiler output, from neighboring rooms – at least 30 cm²/kW;
  • The boiler must be connected to the power supply by a separate cable through a separate circuit breaker, the rated current of which is specified in the technical documentation;
  • the boiler drum must be earthed, for which purpose an earthing rail is provided in the boiler room.

In this post, we go over the features in detail and offer suggestions for selecting a solid fuel boiler to heat the house and cottage. This article explains how to choose an electric boiler type and how to use the formula to accurately calculate its power.

Tank for fuel storage and supply

Fuel tanks installed in boiler rooms are required to have a capacity of no more than 0.8 m³. Typically, special tanks with the following features and composed of polymer resistant to aggressive liquids are used for this purpose:

  • fuel intake tank with a hose and a float, which allows taking fuel from the surface, where it is not contaminated with sediment;
  • breathing valve for removal of fuel vapors;
  • float level gauge showing the fuel consumption and residual fuel;
  • filter for diesel fuel, it is installed only if there is no such in the boiler burner.

For heating during the winter, 0.8 m³ tanks might not be enough. For this reason, installing an external storage tank is a common solution for owners of diesel boilers. It can be a block of multiple tanks built especially for diesel heating systems connected by a pipeline, or it can be a lined metal tank with the necessary capacity.

The fuel’s viscosity increases and its movement through the pipeline deteriorates at a temperature of +5°C, which disturbs the stability of the fuel supply to the boiler heater. For this reason, outdoor fuel storage tanks and pipes leading to the boiler must be insulated in areas that experience severe frosts.

In certain cases, underground storage of diesel fuel tanks is necessary to guarantee their thermal insulation. This insulation technique is not bad, but when using it, you have to choose the right model and consider certain boiler parameters, like the suction depth.

Chimney design

Installing a complicated and costly ceramic or stainless steel sandwich chimney is not necessary when using a diesel boiler for heating in a private residence because of the nearly full combustion of the fuel and the low temperature of the flue gases. Additionally, there are no specifications regarding the height of the chimney because supercharging provides the draught in boilers.

Therefore, less expensive coaxial chimneys with integrated ventilation channels are typically used for diesel models. Additionally, it makes it possible to resolve the issue with the boiler furnace’s air supply.

Typically, a coaxial chimney exits through the boiler room wall. It is not necessary to insulate flue ducts further because the recuperator in a coaxial air exhaust system prevents heat from rising up from surrounding buildings and condensation from forming inside the flue pipe.

The diameter of the chimney is the only prerequisite that needs to be met. It ought to match the boiler’s output flue pipe. It can enlarge; however, it cannot, under any circumstances, reduce its diameter.

Connection to the heating system

Diesel fuel burns to produce soot, which is mostly composed of active compounds that, if they come into contact with moisture, turn into aggressive liquids called acids. When the low temperature return flow is supplied, condensation may form inside the combustion chamber. The minimum return temperature ranges from 40 to 60ºC depending on the model.

It is essential to install a jumper between the direct and return supply right after the boiler in order to prevent this unpleasant occurrence. via which the temperature will be brought back to normal by feeding hot return water.

A diesel boiler is connected to heating systems in the same way as other heating equipment in all other respects. Although it is not necessary, the expansion tank, safety group, circulation pump, and distribution manifold are typically located in the boiler room for convenience.


Any equipment will only function reliably and for an extended period of time with routine maintenance. and the diesel boiler is no different. Revision, cleaning, and, if required, assembly repair of the boiler are required once a season, and occasionally more frequently.

The primary issue with diesel boilers is the buildup of soot on the walls of the combustion chamber and the heat exchanger. A one-centimeter layer of soot reduces boiler output by 20–30% and increases the need for costly fuel. Cleaning out deposits on a regular basis is essential to prevent fuel consumption increases and boiler failure from corrosion.

The best option is to enlist the assistance of the service center’s experts, who will not only remove impurities but also, if needed, replace worn gaskets and oil seals and adjust the burner and turbocharger. The cost of maintenance services is typically not too high, and over time, the boiler’s long, uninterrupted operation and minimal use of pricey fuel oil will offset these expenses.

Using diesel equipment to heat a private residence is a practical and profitable solution. even with the hefty cost of diesel fuel. The high level of automation in this process shortens the time needed for fuel preparation and boiler maintenance. Your home will always be cozy and warm if the heating system is mounted and installed correctly.

Use of diesel boilers for heating

Heating a country house with diesel-powered boilers is not unheard of. With its large capacity, this equipment is ideal for heating expansive spaces. Diesel fuel is widely accessible.

It’s also important to note the wide range of liquid-fuel models when contrasting the diesel boiler with other units. For the equipment to be truly effective, though, a few subtleties must be considered during the purchase process, and several guidelines must be considered during installation.

Construction and operational features

Boilers powered by diesel fuel have an efficiency of up to 95%, and sometimes even higher. This is accomplished by using nozzles to maximize the release of heat by atomizing a fuel mixture in the air stream.

A fan is used to create the air flow. An ignition device is used to start the mixture’s ignition.

Nuances of selection

When selecting a diesel fuel heating boiler, it is advised to prioritize models featuring a burner that can be replaced. This will enable the boiler to be converted to run on natural gas, if needed. Liquid-fuel and gas boilers operate very similarly in principle; the type of burner is the only distinction.

The cost of boilers with replaceable burners is higher than that of models without replaceable burners that are built-in. In addition, built-in burners can be made to run on diesel and gas simultaneously. It is accurate to say that these gadgets are "capricious" in nature and have poor efficiency. The least expensive boilers available, featuring an integrated burner that operates solely on liquid fuel.

Additionally, some units have a burner that has a heating system; this is a measure to cut down on fuel oil consumption.

Heat exchanger material

Steel or cast iron are the common materials used for the heat exchangers in residential liquid-fuel boilers. The first material is strong and has a 50-year service life when heated to high temperatures. Because cast iron is impervious to corrosion, additional maintenance for a diesel-fueled boiler is not necessary. Heat leakage results in low efficiency, which is a drawback of cast iron heat exchangers.

Heat exchangers for boilers with higher economy and efficiency indicators—up to 98%—are made of steel. Nonetheless, steel components have a 15-year service life at high temperatures. This is because condensate forms on the heat exchanger elements during the combustion of fuel that contains a significant amount of sulfur, which encourages corrosion.

Thus, it is necessary to regularly check the working elements’ condition in a diesel boiler with a steel furnace. You can purchase a unit with an alloy steel heat exchanger to increase its service life; this type of heat exchanger is more durable and robust than standard ones.


Boilers that run on solar oil are classified according to the equipment’s intended use. Therefore, distinguish between this type of heating device based on its functionality:

  • Single-circuit – designed only for heating water in the circuit of the space heating system. The heat carrier is brought to the desired temperature in the heat exchanger, and then with the help of a pump is distributed through the heating pipes;
  • two-circuit storage – allow not only to heat the room, but also to heat running water. Disadvantage – the temperature of water in the plumbing system is not constant;
  • double-circuit with a boiler – constantly provide housing with hot tap water and heat. Water temperature for domestic use is constant.

According to the method of control

Boilers are separated into three categories based on how the fire can be adjusted:

  • single-stage – the combustion power is not regulated;
  • two-stage – have two levels of power;
  • with flame modulation – controlled according to the temperature mode.

The type of burner being used dictates how the fire is controlled in terms of intensity. Every heating boiler has an electronic control unit that, should something go wrong, turns the boiler off automatically.

Advantages and disadvantages

Unlike installing gas equipment, installing a diesel boiler does not require a special permit. The diesel boiler also boasts a high efficiency factor. As mentioned above, depending on the device’s make and model, this coefficient can reach a level of 95–98%.

There is a large assortment of equipment sorted by capacity, and each type of equipment has a heating method that works well for both small and large areas.

Minuses in the features

There are a few guidelines that must be followed when installing liquid-fuel equipment: the boiler should be placed in a room with a minimum ceiling height of 2.5 meters, and the fuel reserve tank should be buried underground. It is feasible for the owner of a private residence to install the unit in the basement, given that there is a separate exit leading to the street. Acquiring the necessary authorization is necessary when converting a diesel boiler into a gas boiler.

Equipment that runs on liquid fuel produces a lot of noise. Installing the technique in rooms with adequate soundproofing is preferable. It is advised to avoid using this technique in living rooms as the unit may also release an offensive stench. With the exception of gas boilers, other boiler types are less "fastidious" about the location and working environment. Electric equipment stands out in particular because it can be used to heat both residential apartments and country houses.

Compared to electric

A diesel boiler uses a very small amount of electricity in comparison to an electric boiler. The only reason the equipment needs to be connected to the network is to keep the automation unit and burners operating.

As a result, heating with diesel fuel is the best choice for structures experiencing issues with the supply of electricity.

But in this instance, there might be issues with the fuel’s quality. It’s crucial to only use the best fuel oil when filling the boiler; otherwise, the burner will eventually start to smoke, the heat exchangers will get dirty, and the device’s efficiency will suffer.

You must first diagnose the machinery in order to fix these issues, after which the heavily worn components must be replaced.

Fuel consumption

Diesel-fueled boilers have expensive operating expenses. Recalculating shows that solar oil is the second most expensive fuel after electricity per KWh of generated heat energy. Purchasing the most efficient equipment is advised to guarantee that the boiler’s long-term operation won’t be overly costly. Particularly cost-effective is the condensing apparatus.

The amount of diesel used to heat the home, regardless of the boiler model selected, is also influenced by outside variables, such as:

  • total area and ceiling height of the heated premises;
  • presence or absence of thermal insulation in the house;
  • peculiarities of the local climate.

A 200 m2 residential home in the middle latitudes of Russia will need between 4 and 5 thousand liters of diesel fuel to provide heating during the transition from mid-autumn to spring. Considering that the average cost of a liter of this fuel was 34 rubles as of July 2015, the heating season’s expenses will range from 136 to 170 thousand rubles (depending on the boiler performance).

More than fifteen thousand rubles will need to be spent on equipment service and maintenance. Funding is also required for the building of a fuel storage facility. Nevertheless, if the boiler is sufficiently efficient, these expenses should eventually pay for themselves.

Diesel heating boilers

The indisputable benefit of diesel boilers is their lack of reliance on outside sources, like the gas pipeline. High expenses are unavoidable because diesel fuel is less expensive than electricity. Diesel boilers don’t need a permit to be installed, and they’re quiet, efficient, and self-sufficient. They are more expensive than other boiler types, though, and they need more maintenance. Reviews of diesel heating boilers can help you make sense of this matter if you’re thinking about purchasing such equipment but are concerned about its high fuel consumption.


Viessmann 100

Used a Wisman liquid fuel boiler for six years. 13 to 15 liters are consumed on average each day. I’ve spent two days a week at the cottage. The house is 200 m³ in size. The quality of the content is high. extremely sensitive to fuel oil quality. Thus, in theory, I was happy with it the entire time it was in operation.

+ Pros: convenient and dependable.

Drawbacks: exorbitant fuel expenses, costly upkeep, and unpleasant smell!

Why diesel boilers are unprofitable, and how to reduce the cost of their operation?

Fuel is becoming more and more expensive, making it often less profitable to use for heating than electricity. One of the many drawbacks of boilers with liquid burners is that even models from the most well-known manufacturers frequently use more fuel than what is specified on the passport. But if you follow a few suggestions, you can cut your heating expenses.

I adhere to them religiously and am quite happy with my boiler:

Diesel fuel intended for car engines should not be used. There is a special, less expensive furnace fuel for boilers, but there is no difference in the calorific value of the fuel used in the combustion process for burners, which lack precision unlike diesel engine fuel equipment.

Raskegulirovanie air-fuel ratio frequently contributes to a decrease in boiler efficiency. As such, it is imperative to undertake periodic modifications.

Since different fuel types might require different settings, I only purchase fuel from a single brand and supplier.

Adhere to the same guidelines as me and refrain from taking offense at the various models of liquid fuel boilers without cause in many situations.

+ Advantages: Burners are inexpensive and can operate entirely on their own.

Cons: Fuel is pricey.

Understanding how much diesel fuel boilers use is essential to our investigation of heating and insulation for homes. The cost of heating and the environmental impact of a diesel fuel boiler are directly impacted by its efficiency. Homeowners can maximize efficiency and minimize fuel usage by investigating factors that affect consumption, such as insulation quality, boiler size, and maintenance procedures. Investigating these dynamics reduces fuel consumption and emissions, which helps with sustainability efforts in addition to lowering heating costs.

For me, the diesel boiler is beneficial

I constantly read negative reviews about diesel boilers, so I want to dissuade everyone. Has been standing in the country house for many years, 0 problems with it. The house is large, two-storey, the area of about 145 meters.sq. In winter it eats no more than 12 liters per day, while at home Tashkent. A year ago spent a floor heating 3 kw and a couple of converters, each one kw, so that the fuel consumption is reduced to 6 liters per day. At the same time, the temperature outside reaches -25C. I take the fuel on a call, the gasoline truck comes and pours how much is needed in the tank, if you take more than 500 liters, the delivery is free.

The boiler has a two-circuit model, is composed of steel, and has a capacity of approximately 25 kW. We only spend the weekends in the cottage with the family; the house is completely heated after an hour of boiler work. Thus, I can state with confidence that he has more than enough power. I’m happy with the boiler overall.

+ Advantages: Simple, convenient, and quick heating

Cons: None that I can think of

Boiler Model Diesel Fuel Consumption
Model A 5 liters/hour
Model B 7 liters/hour

Comfort and energy savings in your home depend on having an efficient heating system. The boiler is an essential part of this process, particularly if it uses diesel fuel. Although diesel boilers are a dependable and economical heating option, it is crucial to comprehend how much they use in order to properly manage energy consumption.

You may evaluate the effectiveness of your diesel boiler and improve your heating system by keeping an eye on how much it uses. Monitoring fuel consumption over time allows you to spot trends, spot abnormalities, and make the necessary corrections to increase efficiency. By minimizing fuel waste, this proactive approach not only minimizes your environmental impact but also saves you money over time.

Weather, thermostat settings, insulation quality, boiler size, and other factors can all affect how much diesel fuel is used. By properly insulating your home, you can drastically lower heat loss and improve the efficiency of your boiler. To further optimize fuel usage, contemporary thermostats with programmable features allow you to adjust temperature settings according to your schedule.

To guarantee that your diesel boiler performs at its best, regular maintenance is essential. Easy maintenance procedures like clearing the burner and heat exchanger, looking for leaks, and changing worn-out components can stop inefficiencies and expensive repairs later on. Furthermore, arranging yearly professional inspections guarantees that any possible problems are found early on and that your boiler continues to operate dependably and efficiently.

To sum up, maintaining a cozy and energy-efficient home requires knowing and controlling the amount of diesel fuel your boiler uses. You can optimize efficiency, minimize expenses, and lessen your environmental impact by keeping an eye on consumption, adjusting settings, making insulation investments, and carrying out routine maintenance. By taking these preventative steps, you can benefit from dependable heating and help create a more sustainable future.

Video on the topic

Diesel heating in a country house/ Navien LST 17 KG boiler/ Rifar Base radiators/ Plumbing/ Tank/

The price of heating with a diesel boiler Navien. Consumption of diesel fuel, nuances.

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Sergey Ivanov

I like to help people create comfort and comfort in their homes. I share my experience and knowledge in articles so that you can make the right choice of a heating and insulation system for your home.

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