The best solid fuel boilers with a bunker

The fully automatic boiler Altep DUO UNI PELLET 21 adapts to the conditions of residential buildings and industrial buildings with an area of about 168 m². It can operate in heat maintenance mode with a power modulation of 25% of the nominal value, and at maximum it provides an efficiency of 91%. Heating occurs without user intervention due to a 300-liter hopper with automatic pellet feeding. This is enough for 60 hours of continuous burning and efficient heating.

The torch type burner is economical, completely burning only the necessary part of the fuel. It is capable of extinguishing and rekindling independently based on the temperature sensor readings inside the heat exchanger. Moreover, the burner cleans itself automatically and does not require regular maintenance. When using high-quality pellets, there is practically no ash left.

The manufacturer also provided for manual maintenance and loading of the boiler if it is planned to use firewood, briquettes or coal for heating. The multi-channel air supply system optimizes the combustion process to obtain maximum heat.

The Altep DUO UNI PELLET 21 TT boiler is made of 6 mm thick steel and can be operated in normal mode for many years without leaks or seal failure. The latter is also ensured by double insulation of all technological hatches. In this case, it is necessary to take into account the large weight of the boiler (440 kg). Optionally, you can install a Wi-Fi module for remote control.

The Marten Comfort Pellet MC-20P boiler demonstrates increased efficiency and long-term autonomy due to the flare burner and a spacious 350-liter hopper. One full load of pellets is enough for several days of heating (from 2 to 4 depending on the quality of raw materials and temperature conditions) without maintenance from the user. A torch-type burner allows you to burn fuel in batches, automatically extinguish and re-ignite for more precise temperature control.

The equipment is compatible with wood and sunflower husk pellets. The latter make it possible to reduce fuel purchase costs by 3–4 times while maintaining energy efficiency.

The Marten Comfort Pellet MC-20P boiler is made of 5 mm thick sheet steel. The welding process is robotic, which guarantees high quality assembly and eliminates leaks during the entire service life, which, by the way, according to the manufacturer is 20 years. The top of the boiler is coated with powder paint, which is not afraid of high temperatures and humidity. The equipment can be installed in basements or warehouses without the risk of corrosion. The internal design includes a water jacket and a multi-level heat exchanger. All the described advantages lead to an increase in boiler efficiency up to 92%.

A boiler with an automatic pellet fuel supply system, Feniks Series E Plus 22, is designed to serve private households, commercial and non-residential premises with a total area of up to approximately 176 m².

Structurally, the model consists of a boiler part and a bunker with a volume of 400 liters attached to it. One full load of the bunker provides a couple of days of autonomous heating (depending on the quality of raw materials and temperature conditions). In this case, no intervention in the operation of the equipment is required - fuel is supplied automatically, and the automation is also responsible for controlling the combustion intensity.

The Feniks Series E Plus 22 four-pass heat exchanger is made from heat-resistant boiler steel and has an increased surface area of 2 m². Thus, its energy potential is maximized and fuel is consumed economically. The boiler's automatic control unit is located on the top panel of the housing, and the chimney pipe with a diameter of 159 mm is located at the rear.

The front panel of the unit body is occupied by four doors. The top one is for cleaning the heat exchanger, the bottom one is for servicing the ash pan. The middle doors are designed to supply fuel (firewood and coal briquettes - through a higher door with a convenient vertical tilt, pellets - through a lower doorway). As standard, a burner is mounted behind the second door from the bottom, and a hose for automatic supply of pellet fuel from the bunker is connected to it. The only disadvantage of the model is its more modest efficiency than that of its peers (about 85%). But the boiler is presented on store shelves in a wide range of power options: from 17 kW to 250 kW(for an area of over 2000 m²).

The Heiztechnik Hit Pellet Duo 20 boiler belongs to energy-efficient class A+, is compatible with different types of pellets and is capable of heating rooms of about 160 m². A design feature is a cast iron grate, which allows you to burn wood and briquettes by direct loading in the event of a temporary lack of wood pellets. The proprietary flare burner with auto-ignition is compatible with fuel of various qualities, including those with a high content of impurities, is automatically cleaned and guarantees stable operation of the boiler. When using high-quality pellets, efficiency can reach 92%, which exceeds the performance of competitors. The large 300 liter hopper deserves special attention, which significantly increases the autonomy of work on one load. The heating system can operate without maintenance for more than a day, allowing you to go to work or take a weekend vacation.

The TT boiler is equipped with HT-tronic 900 automation, which automates and controls the operation of the device. You can get remote access to the system operating parameters using the optional HT-tronic Connect module, which is very convenient if you are absent for a long time or the heated room is located far from home, for example, greenhouses, farms, warehouses.

The heavyweight boiler Metal-Fach Smart Bio 20 belongs to the category of single-circuit solutions for floor installation. The model will come in handy for deploying autonomous heating systems with hot water temperatures from 60 °C to 95 °C.

The boiler is supposed to be used to heat an area of up to 160 m². The process of its operation is fully automated - the user only has to pour pellets into a special hopper with a volume of 200 liters. This must be done once every one or two days. The unit is controlled by the PLATINUM PELLET controller, which determines the need for fuel and accurately doses it. As a result, significant energy savings are achieved.

The combustion chamber of Metal-Fach Smart Bio 20 contains additional ceramic plates that increase the efficiency of the combustion process. And in the convection channels of the boiler, special swirlers (turbulators) are placed - they reduce the rate of exit of flue gases, maintaining high heat transfer through the water jacket. The model's chimney is located in the upper segment of the body (with a diameter of 160 mm).

For safety reasons, the boiler is equipped with limit switches in the door and damper - when they are opened, the operation of the burner and other elements is automatically suspended until closed again. The only drawback of the model is its heavy design (over 400 kg) - delivery and installation of equipment can be a difficult task.