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A long-burning heating boiler is designed to heat residential premises for a long time without adding fuel, as well as to produce hot water for the needs of residents. Most of these devices are able to operate on a single load of solid fuel for about 12 hours. Some models can keep warm for up to several days. The choice of such equipment is huge, it is important to be able to distinguish an efficient high-quality boiler from less functional devices.

Distinctive features

The solid fuel long-burning boiler with double circuit is a modernized version of the classic heating equipment.

Among other things, it also has a built-in heat exchanger that provides the home with a full hot water supply.

The design of the model with two contours includes the following elements:

1. Frame — can be made from sheet steel or cast iron. The thickness of the metal is from 4 to 6 mm.
2. Furnace chamber. Usually made from the same material as the body of the device.
3. grate type. It is located inside the combustion chamber, the material is cast iron. Enriches the fuel with the oxygen necessary to sustain combustion.
4. Ash pan. Accumulates solid waste generated during combustion.
5. Chimney — removes combustion products outside the room.
6. «Water jacket». Most often it is built into the boiler body and filled with water, which receives heat from the walls, after which it enters the heating system.
7. Additional heat exchanger coil — distinguishes double-circuit models from single-circuit ones. It is built into the water jacket of heating equipment to provide hot water at home.

The main disadvantage of this design is the low degree of productivity. Therefore, models made of cast iron are more popular because they cool longer.

Device types

According to the method of fuel combustion, long-burning boilers with a double circuit can be divided into:

• Pyrolysis. Equipped with two combustion chambers. In one of them, the process of smoldering and release of gas for pyrolysis occurs, in the other, the resulting gas is mixed with oxygen and burned. Equipment of this type is characterized by high environmental friendliness — a minimum amount of harmful substances is released into the atmosphere. During combustion, little soot is produced. If the boiler is equipped with automation, it will be possible to adjust the power.
• With upper combustion chamber. These boilers are very easy to maintain. The amount of automation for their stable operation is minimal, it is possible to function offline without electricity. There are also disadvantages — a lot of ash is formed during operation, there is a list of requirements for fuel types. For example, small chips or sawdust are not suitable for kindling.
• Pellet. For kindling such equipment, special pellets or compressed fuel briquettes are used. Such boilers are environmentally friendly, economical and efficient, have a long service life. One of the main disadvantages is the high price of the boiler and the special conditions that will have to be maintained for fuel storage. The room must be dry, high humidity will contribute to the deterioration of the pellets.

How to choose and what to look for?

The most important indicators when choosing solid fuel boilers for long burning with a built-in water circuit are:

1. Availability of required fuel.
2. The power level of the device depends on the area of ​​the heated premises and the required temperature regime of the coolant.
3. The type of draft generated inside the combustion chamber. May be forced or natural. This parameter affects the possibility of placement in a particular room and the level of performance of the boiler.
4. Efficiency. It will depend on the type of fuel used, the design features and the additional equipment used (the presence or absence of an exhaust hood, fuel supply automation, etc.).
5. The material of the heat exchanger — usually cast iron or steel — affects the reliability of the device and the characteristics of heat engineering.
6. The type of location of the water jacket is important in order to correctly determine the installation location of the boiler in terms of fire safety rules.
7. The weight of the unit is an important factor in determining the base where the boiler will be located. It must be strong enough and not subject to deformation.
8. The method of loading fuel and the size of the combustion chamber are important for determining the cycle of use of the unit and the possibility of setting up its automated maintenance.
9. The design features of the ash pan and its accessibility will affect the convenience of performing maintenance and preventive maintenance of the boiler.
10. Value Level — Depends on a combination of the factors listed above and the OEM’s brand reputation.

The best solid fuel boilers for long burning with a water circuit

Stropuva Mini S8 8 kW

Stropuva Mini S8 8 kW

Solid fuel heating boiler. is able to heat a residential or industrial premises, up to 80 m2.

It is efficient and fully prepared for intensive operating conditions, including year-round use. A separate advantage is independence from electricity. The boiler can work with different types of solid fuels — coal, firewood, pellets.

Differs in the compact sizes. Fuel loading is simplified by the vertical arrangement of the firebox door. The ash pan is designed so that cleaning can be done only a couple of times a month.

The special technology of burning used in this model allows to provide long burning of fuel with high efficiency.

One bookmark of raw materials will provide you with warmth for at least a day. The duration of burning pellets is up to 48 hours, depending on the external conditions and the quality of the fuel.

Characteristics:

• power — 8 kW;
• heated area — up to 80m2;
• purpose — heating;
• boiler volume — 40l;
• type of combustion chamber — open;
• weight — 145kg;
• dimensions — 55.5 * 136.5 × 55.5 cm.

ZOTA Topol-22VK 22 kW

ZOTA Topol-22VK 22 kW

In this model, the configuration of the heat exchanger has been successfully changed and water-filled grates have been used. The case of the device is reliably thermally insulated.

It has 2 combustion chambers, thanks to which both horizontal and vertical fuel loading is possible. The chamber doors are securely locked.

The boiler combines a relatively budget cost with a high efficiency of the device.

There is a separate door that allows you to remove the ash even during operation of the device. One load of fuel will provide you with heat for 10-12 hours.

Additionally, you can install an external control panel to block the heater, automate the combustion process.

Characteristics:

• power — 22 kW;
• Efficiency — 70%;
• non-volatile;
• heated area — up to 200m2;
• purpose — heating;
• weight — 128kg;
• dimensions — 90.5 * 47 * 87 cm.

ZOTA Topol-16VK 16 kW

ZOTA Topol-16VK 16 kW

Another representative of the line of boilers with a water-filled grate, which guarantees an increase in the heat transfer of the device.

Its pipe has a triangular shape, which eliminates blockages and increases service life. The boiler can consume pellets, firewood or coal as fuel.

The boiler is convenient to operate, thanks to the large size of the furnace and two ways of laying fuel — it is convenient to load coal from above, and firewood — into the drawer door.

The low cost is favorably combined with the efficiency of space heating.

Characteristics:

• power — 16 kW;
• Efficiency — 70%;
• heated area — up to 160m2;
• purpose — heating;
• weight — 108kg;
• dimensions — 80.5 * 44 * 87 cm.

ZOTA Topol-32VK 32 kW

ZOTA Topol-32VK 32 kW

A boiler operating on various types of solid fuels has a high level of performance, which makes it possible to make the heating system of the house of high quality and stability.

The equipment is considered very practical, since it can be converted to natural gas consumption.

The body of the equipment has good thermal insulation, allowing you to install it in any convenient place.

The efficiency of the device is quite high, given the low price among analogues. Single loading of fuel allows you to maintain heat in the heating system for up to 12 hours.

Characteristics:

• power — 32 kW;
• Efficiency — 70%;
• non-volatile;
• heated area — up to 320m2;
• purpose — heating;
• weight — 143kg;
• dimensions — 87 * 44 * 100.5 cm.

Stropuva S30 30 kW

Stropuva S30 30 kW

Solid fuel heating boiler for installation in residential and commercial premises. Cost-effective, ready for seasonal or year-round operation.

Does not depend on electricity, can work on different types of solid fuel, has a high efficiency.

Compact and does not require a separate space for installation, has a certificate of environmental safety. Duration of burning firewood — up to 30 hours, pellets — up to 2 days. No power required.

Characteristics:

• power — 30 kW;
• Efficiency — 85%;
• heated area — up to 300m2;
• purpose — heating;
• weight — 143kg;
• dimensions — 87 * 44 * 100.5 cm.

Stropuva S40 40 kW

Stropuva S40 40 kW

Solid fuel boiler of long burning with one circuit for providing space heating, up to 400 m2. firewood or wood briquettes can serve as fuel.

It has an open type combustion chamber, installed on the floor.

Characteristics:

• power — 40 kW;
• Efficiency — 85%;
• heated area — up to 400m2;
• purpose — heating;
• weight — 143kg;
• dimensions — 87 * 44 * 100.5 cm.

TEPLOV Universal TA-40 40 kW

TEPLOV Universal TA-40 40 kW

Water heating and heating boiler of long burning, can heat residential and industrial premises and provide them with hot water.

Suitable fuels are in briquettes, wood and coal.

You can choose an automated or non-volatile device option.

In the first case, you will receive reliable protection against overheating, freezing of liquid in the system, the ability to adjust the temperature level for day and night modes.

Characteristics:

• power — 40 kW;
• Efficiency — 82%;
• heated area — up to 400m2;
• purpose — heating and hot water supply;
• weight — 390kg;
• dimensions — 147 * 48 * 77 cm.

SAS UWT 14 14 kW

SAS UWT 14 14 kW

The solid fuel boiler is made of steel and insulated with mineral wool to reduce heat loss. Can be installed in closed or open systems.

Equipped with an automatic control system.

It is possible to connect a DHW boiler.

The preferred fuel is coal, but kindling with wood is also possible.

Characteristics:

• power — 14 kW;
• Efficiency — 83.5%;
• heated area — up to 120m2;
• purpose — heating;
• weight — 310kg;
• dimensions — 54 * 141 * 101 cm.

TRAYAN TPG-15 15 kW

TRAYAN TPG-15 15 kW

The boiler is equipped with one circuit and is intended for use as part of a central heating system with forced or natural circulation.

It is possible to connect a DHW boiler.

The unit differs from analogues by its low price while maintaining high performance.

Firewood, peat or fuel briquettes can serve as fuel.

Characteristics:

• power — 15 kW;
• Efficiency — 82%;
• heated area — up to 130m2;
• purpose — heating;
• weight — 270kg;
• dimensions — 72 * 73 * 160 cm.

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