With the onset of cold weather, purchasing a heating boiler is becoming an increasingly pressing problem for owners of private houses or workshops.
Today in stores there are many heating devices operating on both solid and combined fuels.
Solid fuel appliances burn wood, coal and other solid fuels.
Filling is usually done through a horizontal firebox.
Some devices are equipped with additional options.
To choose the right boiler for heating, you should take into account the features and characteristics of each model.
Place | Name | Price |
TOP 10 best classic solid fuel boilers | ||
1 | Kentatsu ELEGANT-03 17 kW | Find out the price |
2 | Protherm Beaver 50 DLO 39 kW | Find out the price |
3 | Teplodar Cooper Praktik 8 | Find out the price |
4 | Teplodar Cooper Praktik 14 14 | Find out the price |
5 | ZOTA Box 8 8 kW | Find out the price |
6 | Lemax Forward-20 | Find out the price |
7 | ZOTA Topol M 14 14 kW | Find out the price |
8 | Protherm Beaver 20 DLO 19 kW | Find out the price |
9 | Lemax Forward-12.5 13 kW | Find out the price |
10 | Lemax Forward-16 17 kW | Find out the price |
TOP 5 best long-burning solid fuel boilers | ||
1 | Stropuva Mini S8 8 kW | Find out the price |
2 | ZOTA Topol-22VK 22 kW | Find out the price |
3 | ZOTA Topol-16VK 16 kW | Find out the price |
4 | ZOTA Topol-32VK 32 kW | Find out the price |
5 | Stropuva S30 30 kW | Find out the price |
TOP 5 best pyrolysis boilers | ||
1 | TRAYAN T15 15 kW | Find out the price |
2 | Bourgeois-K MODERN-12 12 kW | Find out the price |
3 | Bourgeois-K MODERN-24 24 kW | Find out the price |
4 | TRAYAN T20 20 kW | Find out the price |
5 | TRAYAN T10 10 kW | Find out the price |
Types and brief description
The devices differ in several features that you should pay attention to before purchasing.
Some boilers are not suitable for the type of power supply, others for the design.
Type of fuel
The heat source for solid fuel appliances is most often coal, wood or peat.
Fuel must be added every 4-8 hours, excluding long-burning models; adding firewood depends on the power, combustion mode and area to be heated.
Some devices are equipped with an additional thermometer, an auto-ignition system and a control panel.
Principle of fuel combustion
Pyrolysis - the basis of the device is the generation of heat by combustion of gas. Gas is extracted from wood by dry distillation from 600 to 800 degrees Celsius.
Water is heated by burning gas, which is produced by pyrolysis . This type of boiler has an increased efficiency of up to 91%. When operating such models, there is practically no emission of ash and soot.
Traditional - use heat from the combustion of filling material . Modern models use the top combustion technique, which ensures that each fuel burns alternately. Because of this, the amount of ash is reduced and efficiency increases to 80%.
Energy dependence
Volatile devices are devices that require power from the mains to regulate heating, temperature, ventilation and pump adjustment.
Non-volatile - these boilers do not require additional power sources . All control of temperature control, smoke removal, and water circulation is carried out mechanically.
How to choose and what to pay attention to
Type of fuel
If the client prefers coal when choosing fuel, then it is better to choose a boiler and steel . If firewood is used as fuel, then a cast iron model would be the best choice.
Power
This criterion determines how much area the device will be able to heat and how often it is necessary to add fuel.
NOTE!
For a large room and a two-story private house, a boiler with a capacity of 20-36 kW is suitable.
And for a small country house 14 kW is enough.
Weight and cost
The large weight and dimensions will cause inconvenience if the client does not have a special place to place the boiler.
Heavy weight also means higher installation and shipping costs . In addition, heavy boilers are much more expensive than lighter models.
Economical
The coefficient of a cast iron boiler is lower than that of a steel boiler. But a cast iron boiler takes longer to cool, thereby retaining heat for a longer time.
The time interval between fuel additions depends on the combustion time . Thus, economical cast iron models can keep warm all night.
Durability of the design
The default lifespan of equipment is about 10 years. But this depends on the careful handling of the owner and the quality of the materials from which the boiler is made.
If you choose a model with good materials, reliable assembly and properly care for the heating equipment, the device will last longer.
Safety
The equipment may become hot, creating a risk of burns.
Modern devices are equipped with a special layer of protection, and the walls of such devices do not heat up . In addition, protection is used on the door handles and a control panel is connected.
Installation features
When installing solid fuel stoves for a country house or home with a long-burning function, it is necessary to take into account a number of nuances:
- The stove should not be placed in a corner of the room or close to the wall. A sharp contrast in temperatures during the cold season - from sub-zero outside to high near the stove - will inevitably provoke the constant formation of condensation on the wall, which can ruin even the highest quality finish in just one season.
- If the weight of the heating system exceeds 100 kg, it is necessary to equip a special podium. This can be a concrete screed or hand-made brickwork.
- The distance from the stove to flammable surfaces must be at least 1.2 m. If this rule cannot be observed (for example, due to the modest size of the room), cover all “dangerous places” with heat-resistant asbestos sheets or install special protective screens.
- Make the chimney pipe collapsible. The fact is that in long-burning furnaces a lot of soot accumulates, which must be removed in a timely manner. Make this process easier in advance, even at the stage of installing the heating system.
Carefully follow the recommendations contained in the operating instructions for the heater. As a rule, manufacturers clearly describe both the process of installing the stove and the features of its functioning.
Popular manufacturing companies
There are several reputable manufacturers that are preferred by clients:
- Stropuva - a Lithuanian brand that provides longer burning from one load of firewood. It has an interesting barrel-shaped design, which makes it possible to install the device in a small room. Lithuanian devices are quite expensive, but they are durable.
- Zota - for those who like to use firewood as fuel, the Russian brand is suitable. The devices are small in size and low in power. But they are also reliably constructed and affordable.
- Burzhuy-K is a Russian company that produces boilers independent of power supply, operating on pyrolysis. The cost of boilers varies from 40,000 to 76,000 rubles. The boilers have high power and retain heat for a long time.
How to make a mine boiler at home
There are many drawings of long-burning units for self-production.
It is impossible to completely replicate an industrial design, but many craftsmen manage to create an analogue.
To assemble a Kholmov boiler at home, you will need to make:
- firebox;
- loading shaft;
- ash chamber;
- grate;
- heat exchange compartment;
- doors;
- dampers;
- chimney.
The most important thing is to make the heat exchanger correctly. If you place it too low, the boiler will instantly boil, which will lead to unpredictable consequences.
The best classic solid fuel boilers
Kentatsu ELEGANT-03 17 kW
Stylish brown solid fuel boiler made of steel . Power 17 kW, suitable for heating a room of 170 sq.m.
Quite a reliable design from a Japanese manufacturer, provides uniform heating of the room.
Copes well with harsh winters.
Characteristics:
- appliance type - solid fuel boiler;
- contours - single-circuit;
- power - 17 kW;
- placement - floor;
- energy independence - yes;
- control - mechanical;
- combustion chamber - open;
- body material - cast iron;
- fuel - coal, firewood;
- pressure - 4 bar;
- dimensions - 450*947*609 mm;
- boiler weight - 166 kg;
- price - 35950 rubles.
Advantages:
- uniform heating;
- cast iron material;
- reliable design;
- easy controls;
- spacious firebox;
- interesting design.
Flaws:
- heavy weight;
- high price;
- no additional features.
Protherm Beaver 50 DLO 39 kW
Solid fuel boiler made of cast iron material 39 kW . The heat is enough to heat a private home. It has a spacious firebox for wood and coal.
Unfortunately, it does not work on other types of fuel - natural gas or pellets.
For the convenience of the client, a thermometer and pressure gauge are built in.
Characteristics:
- unit - heating boiler;
- type of fuel - wood, coal;
- number of circuits - one;
- power - 39 kW;
- energy independence - yes;
- installation - floor;
- control - mechanics;
- combustion chamber - open;
- body material - cast iron;
- Efficiency - 90.2%;
- pressure - 4 bar;
- thermometer - yes;
- dimensions - 440*935*1040 mm;
- boiler weight - 380 kg;
- 92717 rubles.
Advantages:
- quality materials;
- cast iron doors;
- high power;
- 8 heat exchanger sections;
- uniform heating.
Flaws:
- heavy weight;
- high price;
- bulky;
- the bottom of the boiler heats up;
- It is possible to use only wood and coal.
Teplodar Cooper Praktik 8
Steel solid fuel boiler from the Russian manufacturer Teplodar, with a capacity of 8 kW . Heats a small room of 80 square meters.
Suitable for a country house or garage.
Characteristics:
- unit type - solid fuel boiler;
- contours - single-circuit;
- power - 8 kW;
- area - 80 sq.m;
- installation - floor;
- energy independence - yes;
- control - mechanical;
- material - steel;
- Heating element - preinstalled;
- fuel - firewood, coal, peat briquettes;
- functions - thermometer;
- connection of external control - yes;
- boiler weight - 60 kg;
- cost - 12,460 rubles.
Advantages:
- affordable price;
- uniform heat;
- various fuels;
- compact size and light weight;
- easy control.
Flaws:
- the power is not enough to heat a two-story house;
- The housing may become hot.
Teplodar Cooper Praktik 14 14
Classic solid fuel boiler from the Teplodar company with a capacity of 14 kW . Suitable for heating a country house up to 140 square meters.
Installed on the floor.
Characteristics:
- appliance - solid fuel boiler;
- contours - single-circuit;
- thermal power - 14 kW;
- heating area - 140 sq.m.;
- installation - floor;
- control - mechanics;
- non-volatile - yes;
- material - steel;
- Heating element - preinstalled;
- fuel - coal, peat briquettes, firewood;
- thermometer - yes;
- dimensions - 420*655*630 mm;
- boiler weight - 68 kg;
- cost - 15,745 rubles.
Advantages:
- low price;
- compact dimensions;
- a light weight;
- quality materials;
- good heating of the room;
- spacious firebox for storing fuel.
Flaws:
- firewood burns quickly;
- before going to bed you need to add fuel.
ZOTA Box 8 8 kW
Solid fuel heating unit with a power of only 8 kW . Suitable for a small room - a garage, country house or workshop.
The small appliance is equipped with a hob on which you can heat water or food.
Characteristics:
- boiler type - solid fuel;
- contours - single-circuit;
- power - 8 kW;
- placement - floor;
- energy independence - yes;
- control - mechanics;
- combustion chamber - open;
- Efficiency - 70%;
- material - steel;
- hob - yes;
- Heating element - optional;
- fuel - coal and firewood;
- thermometer - yes;
- dimensions - 380*460*630 mm;
- boiler weight - 71 kg;
- cost - 16,100 rubles.
Advantages:
- compactness;
- low cost;
- presence of a hob;
- quickly warms up a small room;
- economical fuel consumption.
Flaws:
- low power;
- at night it is necessary to throw it up.
Lemax Forward-20
A stylish solid fuel device with a power of 20 kW for heating a room of 200 m2 . It features a spacious firebox located on the top panel.
Can be connected to a water heating system. Heats evenly and maintains temperature well.
Characteristics:
- appliance - heating boiler;
- fuel - solid: firewood, coal, coke;
- contours - single-circuit;
- power - 20 kW;
- non-volatile - yes;
- combustion chamber - open;
- Efficiency - 75%;
- control - mechanical;
- installation - floor;
- material - steel;
- thermometer - yes;
- boiler weight - 78 kg;
- fuel loading - vertical;
- cost - 19970 rubles.
Advantages:
- works on any solid fuel;
- quality steel;
- convenient top fuel loading;
- compact dimensions;
- environmental friendliness.
Flaws:
- firewood burns quickly;
- at night it is necessary to throw it up.
ZOTA Topol M 14 14 kW
A bright solid fuel unit with a power of 14 kW for heating a room with a maximum area of 140 m2 . It is possible to install a heating element to maintain the room temperature.
Characteristics:
- unit - heating boiler;
- contours - single-circuit;
- power - 14 kW;
- heated area - 140 m2;
- placement - floor;
- energy independence - yes;
- control - mechanics;
- combustion chamber - open;
- Heating element - optional;
- fuel - coal, firewood;
- thermometer - yes;
- boiler weight - 113 kg;
- cost - 14391 rubles.
Advantages:
- compact dimensions;
- sufficient power;
- the ability to connect a heating element;
- holds heat well;
- acceptable cost.
Flaws:
- firewood burns quickly;
- the walls heat up;
- no additional features.
Protherm Beaver 20 DLO 19 kW
A high-quality unit made of cast iron material with a power of 19 kW . Suitable for heating a private house with an area of 190 m2.
The heat exchanger includes 4 sections.
Characteristics:
- type of device - solid fuel boiler;
- number of circuits - one;
- power - 19 kW;
- area - 190 square meters;
- placement - floor;
- energy independence - yes;
- control - mechanical;
- material - cast iron;
- fuel - coal, firewood;
- thermometer - yes;
- dimensions - 440*935*640 mm;
- boiler weight - 230 kg;
- cost - 52,000 rubles.
Advantages:
- simple controls;
- reliable design;
- large ash pan;
- straight seams;
- good painting;
Flaws:
- high price;
- Not very roomy firebox.
Lemax Forward-12.5 13 kW
An almost silent solid fuel unit with a power of 13 kW for heating an area of 130 m2 . Compact dimensions allow the device to be installed in a small room.
The power is enough to heat a country house.
Characteristics:
- device - solid fuel;
- number of circuits - single-circuit;
- power - 13 kW;
- placement - floor;
- energy independence - yes;
- control - mechanics;
- combustion chamber - open;
- Efficiency - 75%;
- material - steel;
- thermometer - yes;
- fuel loading - vertical;
- boiler weight - 70 kg;
- cost - 14960 rubles.
Advantages:
- fast heating;
- compactness;
- reliable assembly;
- works silently;
- low cost;
- decent power.
Flaws:
- when laying coal there is a lot of dirt around;
- inconvenient to clean.
Lemax Forward-16 17 kW
A variation of the previous model, but with increased power to 17 kW . It consumes fuel quite economically. Warms up a private home well.
Features reliable build quality.
It works silently.
Characteristics:
- unit - boiler;
- fuel - coal, firewood, coke;
- number of circuits - one;
- power - 17 kW;
- area - 170 m2;
- installation - floor;
- non-volatile - yes;
- control - mechanics;
- combustion chamber - open;
- Efficiency - 75%;
- thermometer - yes;
- boiler weight - 73 kg;
- price - 16,500 rubles.
Advantages:
- low noise level;
- uses fuel economically;
- environmentally friendly;
- safe;
- vertical loading of firewood;
- convenient use.
Flaws:
- non-standard chimney diameter.
The best long-burning solid fuel boilers
Stropuva Mini S8 8 kW
Bright solid fuel boiler with a safety valve, power 8 kW . Suitable for heating a room of 80 m2. The fuel burns for up to twenty hours, the temperature is enough for the whole night.
Characteristics:
- type of device - solid fuel boiler;
- type of combustion - long;
- contours - single-circuit;
- power - 8 kW;
- area - 80 m2;
- placement - floor;
- energy independence - yes;
- control - mechanics;
- combustion chamber - open;
- fuel - firewood, wood briquettes;
- safety valve - yes;
- thermometer - yes;
- boiler weight - 145 kg;
- price - 53,000 rubles.
Advantages:
- compactness;
- long burning;
- ease of use;
- reliable handles;
- does not require power supply;
- robust design.
Flaws:
- high price;
- heavy weight;
- it is difficult to wash off carbon deposits from the cladding;
- Not very convenient for loading firewood.
ZOTA Topol-22VK 22 kW
A high-quality solid fuel device with a power of 22 kW, which is enough to heat an area of 220 m2 . Convenient loading consists of two sections for storing firewood.
Characteristics:
- appliance - solid fuel boiler;
- contours - single-circuit;
- power - 22 kW;
- placement - floor;
- control - without control panel;
- fuel - coal, coal briquettes, firewood, wood briquettes;
- thermometer - yes;
- boiler weight - 128 kg;
- price - 36,860 rubles.
Advantages:
- various types of fuel;
- long burning;
- economical consumption;
- convenient operation;
- reliable design.
Flaws:
- heavy weight;
- no control panel.
ZOTA Topol-16VK 16 kW
A decent model of a solid fuel boiler with two sections for storing fuel . Designed for heating a small private house or workshop of 160 m2.
Ensures long burning of wood or coal.
Options:
- unit - heating boiler;
- fuel - coal, firewood, coal and wood briquettes;
- power - 16 kW;
- placement - floor;
- control - without control panel;
- Efficiency - 75%;
- thermometer - yes;
- boiler weight - 108 kg;
- cost - 30,100 rubles.
Advantages:
- heats up quickly;
- gives uniform heat;
- quality materials;
- long burning;
- possibility of laying briquettes;
- easy control.
Flaws:
- high price;
- heavy weight;
- no control panel.
ZOTA Topol-32VK 32 kW
Reliable solid fuel unit with power up to 32 kW . Capable of heating an area of 320 square meters. It is possible to install an additional heating element and connect external control.
Excellent for a country house, ensures long burning of fuel.
Characteristics:
- type of device - solid fuel boiler;
- number of circuits - one;
- power - 32 kW;
- area - 320 m2;
- installation - floor;
- energy independence - yes;
- control - mechanics;
- Efficiency - 75%;
- fuel - coal, coal briquettes, wood briquettes, firewood;
- thermometer - yes;
- connection of external control - yes;
- boiler weight - 143 kg;
- price - 40,370 rubles.
Advantages:
- fast heating;
- reliable assembly;
- simple controls;
- opportunity to purchase a burner;
- economical fuel consumption;
- stylish design.
Flaws:
- heavy weight;
- high price.
Stropuva S30 30 kW
A full-fledged solid fuel boiler with a power of 30 kW for heating a room of 300 m2 . Equipped with thermometer and safety valve.
Made of high quality steel, the material does not become red-hot when the boiler heats up.
The only boiler that continues burning for up to 31 hours.
Characteristics:
- appliance - solid fuel boiler;
- power - 30 kW;
- area - 300 sq.m.;
- placement - floor;
- control - mechanical;
- contours - one;
- non-volatile - yes;
- combustion chamber - open;
- Efficiency - 85%;
- material - steel;
- fuel - firewood, wood briquettes;
- thermometer - yes;
- safety valve - yes;
- boiler weight - 257;
- price - 89,800 rubles.
Advantages:
- long burning;
- uniform heat;
- fast heating;
- quality materials;
- presence of a thermometer;
- economical fuel consumption.
Flaws:
- high price;
- heavy weight;
- bulky.
The best pyrolysis boilers
TRAYAN T15 15 kW
Model of a pyrolysis boiler from a Russian manufacturer powered by solid fuel . Made of high quality steel, the material does not heat up and is easier to clean than cast iron models.
After prolonged use, the paint may peel off.
Options:
- boiler type - solid fuel;
- type - pyrolysis;
- thermal power - 15 kW;
- heated area - 160 m2;
- installation - floor;
- energy independence - yes;
- control - mechanical;
- Efficiency - 85%;
- fuel - firewood, coal;
- boiler weight - 230 kg;
- pressure - 95%;
- price - 44370 rubles.
Advantages:
- low noise level;
- uniform heating of the room;
- heats up quickly;
- reliable assembly;
- quality material;
- good paint job.
Flaws:
- high price;
- heavy weight.
Bourgeois-K MODERN-12 12 kW
Solid fuel boiler of rich bright color, made of high quality steel . A power of 12 kW is enough to heat a room of 120 m2.
Works on wood, coal, peat briquettes.
Suitable for a country house or workshop.
Options:
- type - boiler;
- fuel - firewood, coal, wood briquettes, peat;
- number of circuits - single-circuit;
- power - 12 kW;
- heated area - 120 m2;
- combustion chamber - open;
- Efficiency - 92%;
- control - mechanical;
- installation - floor;
- thermometer, pressure gauge - yes;
- boiler weight - 220 kg;
- dimensions - 400*1070*780 mm;
- cost - 59,900 rubles.
Advantages:
- ability to use a variety of fuels;
- high efficiency;
- presence of a thermometer;
- stylish design;
- adequately warms the room;
Flaws:
- overcharge;
- heavy weight;
- inconvenient ash pit.
Bourgeois-K MODERN-24 24 kW
A solid fuel boiler from Russian manufacturers with a power of 24 kW, which is enough to heat a private country house with an area of 250 m2.
The device is installed on the floor and runs on solid fuel.
Characteristics:
- type - solid fuel boiler;
- number of circuits - single-circuit;
- thermal power - 24 kW№
- heating area - 250 m2;
- installation - floor;
- non-volatile - yes;
- control - mechanics;
- fuel - coal, firewood, pellets, wood briquettes, peat;
- maximum pressure - 4.5 bar;
- thermometer - yes;
- pressure gauge - yes;
- dimensions - 500*1180*800 mm;
- boiler weight - 310 kg;
- cost - 76,050 rubles.
Advantages:
- high power;
- convenient control;
- The ash pan is easy to clean;
- quality materials;
- reliable assembly.
Flaws:
- high price;
- heavy weight;
- bulky.
TRAYAN T20 20 kW
Solid fuel boiler with a capacity of 20 kW for heating private houses, workshops and other premises . It is heated with coal and wood.
Installation is carried out on the floor, on special legs.
Thick steel ensures the durability of the device.
Characteristics:
- device type - solid fuel boiler;
- contours - one;
- maximum power - 20 kW;
- area - 220 sq.m.;
- installation - floor;
- energy independence - yes;
- control - mechanics;
- combustion chamber - open;
- fuel - firewood, coal;
- functions - thermometer, pressure gauge;
- dimensions - 460*980*760 mm;
- boiler weight - 260 kg;
- price - 51990 rubles.
Advantages:
- fast heating;
- long burning of fuel;
- the manufacturer promptly responds to customer questions;
- ease of use;
- durable materials.
Flaws:
- high price;
- heavy weight;
- bulky;
- small firebox.
TRAYAN T10 10 kW
A solid fuel device with a power of 10 kW for heating a room of 90 m2 . Suitable for warming up a small studio, country house or workshop.
Characteristics:
- type of device - solid fuel, pyrolysis boiler;
- power - 10 kW;
- number of circuits - single-circuit;
- area - 90 m2;
- installation - floor;
- thermometer - yes;
- non-volatile - yes;
- control - mechanics;
- combustion chamber - open;
- water pressure - 4.5 bar;
- dimensions - 380*860*670 mm;
- boiler weight - 180 kg;
- cost - 38,990 rubles.
Advantages:
- high-quality assembly;
- convenient use;
- easy to clean ash pan;
- reliable materials;
- fast heating.
Flaws:
- heavy weight;
- high price;
- low power.
Criteria for selecting long-burning stoves
When choosing a long-burning stove, you should give preference only to trusted manufacturers from various European brands, since their products are always marked with quality and safety certificates.
It is worth noting that today there are a large number of different types and styles that are expanded with additional functions, have special cladding and are installed in different ways. There are various options that are equipped with fans, an oven, compartments for solid fuel, etc.
The main criterion when choosing a heating device with a long combustion cycle using solid (wood) fuel is its power.
It must correspond to the volume of the heated room. There is no point in installing a high-power stove in a small room, since part of the heating material will burn irrationally. In addition, a large device will take up a lot of space, and the room temperature will be too high.
On the contrary, a low-power stove in large rooms will work at the limit of its capabilities, which will quickly cause it to fail.
When choosing, you should decide on the type of fuel that is supposed to be used - firewood, pellets, coal, fuel briquettes, etc.
You should know that the moisture content of wood fuel is of great importance, since water vapor diluting the gases interferes with combustion, reduces the power of the device and promotes the formation of condensation.
In some cases, excessive moisture in the burned material can lead to spontaneous extinguishing of the furnace. Firewood for long-burning fireboxes, for example, should have a moisture content no higher than 20-35%.
The metal or alloy from which the long-burning furnace is made is also an important selection criteria. The thicker the material of the device body, the slower the device cools and the longer its service life.
Some models of long-burning stoves made of cast iron last up to 50 years and, moreover, are not subject to corrosion.
Elements of many modern stoves - firebox, hob, trim, door - are made from different materials (cast iron, vermiculite, steel, stainless steel, heat-resistant glass, etc.), which allows to increase service life, improve design, improve ease of use and long lasting time to maintain appearance.
The appearance of the heating device often plays no less important role than other factors. A stove for a living space should have a modern design and fit harmoniously into the interior.
There are many imported models on the market, from which you can choose a ready-made stove for any home.
All long-burning stoves are supplied with instructions, but they often do not mention some nuances that must be taken into account:
- It is necessary to provide free space around the stove and protection from fire;
- for easy maintenance (cleaning), the chimney should have a collapsible design if possible;
- pipes must be installed in the direction of gas movement;
- due to low draft, the chimney should not have a curved shape;
- During operation, condensation may form in the chimney.
It should also be noted that liquid fuel cannot be used in long-burning stoves; some models are quite difficult to set up and require constant supervision.