Solid fuel and electric stove. We choose a combined boiler for solid fuel and electricity. Combinations of fuels in boilers

08.03.2020 Heating

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Each owner of a country house wants to heat his area as cheaply and efficiently as possible. You can use different options for solving the problem, but a combined boiler: electric and wood-burning is the best answer to the heating problem. The resource consumption is lower than with gas installations, so the price of autonomy will not be shocking.

Combined heating boilers: wood-electricity - what is it?

This device is able to provide a country house with heat for a long time and reliably. Of course, the name speaks for itself: this boiler works simultaneously on two types of resources - wood and electricity, which are perfectly combined with each other and save a lot of money on fuel (read also: "").

A distinctive feature of such boilers over the standard solid fuel model is the presence of a tubular electric heater installed in the heat exchanger tank (more details: ""). In addition, these wood-burning electric heating boilers have an automatic system for controlling the power of the output heat, so that the device can switch to a more economical mode at any time.

Additional equipment for the heating system

A combined gas firewood electricity boiler can come with special meters and performance control systems that significantly increase the flow of heat into the house (read also: ""). Such sensors can independently turn on the heating mode not with wood, but with electricity, which allows you not to worry about an unexpected cold snap in your home.

In addition, these devices do an excellent job of heating the area and in relatively warm weather, when high power is not required. They drive water through pipes, maintaining a predetermined minimum temperature. Thus, the electric is useful in any weather. If the owners of the property are not at home, and you don’t want to spend a decent amount on heating, then the device can be put into saving mode, which will maintain a temperature sufficient to keep the water in the pipes from freezing.

Features of the structure of the universal boiler

Each such system has a simple, but verified design of the apparatus. As a rule, firewood gas has a firebox at the bottom of the appliance.

Solid fuel is added there, for example:

Firewood (read: "");
Coal;
Peat.

During the operation of the boiler, heat is generated, which heats the liquid in the heat exchanger. This heated water is sent through pipes throughout the house.

In the case of switching fuel from wood to electricity, the main element of the system will be tubular. In addition, in the energy saving mode, the wood combi boiler also switches electricity to current.

Installation and rules for using the device

Since the device works on several types of resources at once, you should be especially careful when using it. In addition, the installation of the boiler must be carried out as much as possible in accordance with the instructions in order to avoid further problems during use.

It is worth starting work with planning the placement of the system. A separate room will be required, since it is better to place combined heating with electric firewood isolated from other housing elements. The boiler itself should be placed on a concrete pad, in addition, it will be necessary to think over and install a chimney and a ventilation system.

If you do not want to deal with the installation of the heating system, then it is better to turn to professionals who will not only quickly bring the matter to the final stage, but will also issue a guarantee for the work done.

The principle of the device of a combined boiler in a private house, details on the video:

Combined boilers firewood electricity: the main advantages

This heating system has a number of advantages over standard gas heaters or wood-burning boilers, for example:

Fuel is cheaper than that of analogues using only one type of kindling. Since not only electricity is consumed, but also wood, it is possible to throw any waste from sawmills into the boiler, which are sold for ridiculous amounts.
The combination boiler is very versatile, as it can switch from wood to electricity at any time. This is especially important, since there are situations when logs are not at hand, and it is necessary to maintain the temperature in the house (read also: "").
This is very economical, as wood and electricity are now the cheapest in the fuel services market. Every year gas becomes more and more expensive, so switching to combined heating will be very profitable.
Universal boilers for heating wood electricity do not have a harmful effect on the environment, as they do not emit emissions into the atmosphere. Thus, it is one of the most environmentally friendly heating systems, safe for allergy sufferers and asthmatics.
The automaticity of the system allows you not to worry about the safety of heat in the house or overspending on fuel even in the absence of property owners.
Electricity and wood emit a large amount of heat, so that the room warms up very quickly and efficiently. A well-thought-out system of the device allows you to avoid heat losses, which also allows you to seriously save on fuel.
Combined boilers have a long service life, so by purchasing such a unit, you can forget about upgrading the heating system for a long time.
The boiler has pleasant external characteristics, so that even putting up a house for sale and taking a photo of a room with a heating system, the seller will only receive advantages from the presence of this system.
Such boilers do not produce dangerous leaks, as is the case with gas counterparts, so you can worry less about the safety of your home.

Currently, such combined systems are gaining popularity due to the cheapness of fuel and the ability to vary the heating mode. They provide excellent performance, heating the home in the shortest possible time without eating up a fortune. In addition, this development will last for many years, so a combined wood and electricity boiler is the choice of those who prefer reliability and practicality.

Every year, modern autonomous heating systems are becoming more and more popular among owners of suburban real estate. For one reason or another, traditional gas heating units are rejected by the owners of private houses (mainly due to the high cost and inaccessibility of gas) and they are being replaced by universal combined boilers.

These are surprisingly reliable, functional and productive devices, thanks to which you can provide heating for a house or any other property.

Combined heating boilers: electricity and wood as the main fuel

At present, wood-fired and electric heating boilers are in the greatest demand among combined equipment. A feature of this technique, as you can already see from the name, is the simultaneous operation of both solid fuel (wood, woodworking waste) and electricity. Such versatility is provided due to the unique thoughtful and rather practical design of the equipment.

By and large, heating boilers for wood and electricity differ from traditional solid fuel boilers only in an additionally built-in heating element (installed in the heat exchanger tank). It should be noted that such heating equipment also uses an automation system that allows you to change the boiler power, operating modes, and also provide switching between fuel types.

Heating technology: accessories and functionality extensions

A variety of combined heating boilers, gas, firewood and electricity are often equipped with special sensors and other systems, due to which the performance of the equipment is significantly increased. Such sensors allow equipment to automatically turn on electric heating elements, thereby ensuring the continuity of heating.

Such versatility is especially effective in cases where the power of the equipment in the combustion mode of firewood or other solid fuels is not enough.

Any heating boiler on electricity and wood is also good because it copes well with low-power operating modes. The instruction for such a technique assumes that even with irregular operation of the boiler, it will be able to effectively maintain a constant minimum temperature in the room, eliminating the possibility of freezing of the liquid in the heating system.

Design features of boilers

Any heating boiler for wood and electricity, as a rule, has a rather simple, but at the same time well-thought-out design. Often, a firebox is installed at the bottom of the unit, where any solid fuel is loaded, whether it be firewood, coal or peat.

The heat released during the combustion of the fuel heats the heat exchanger with the liquid, which subsequently enters the heating system.

Heat source: firewood - electricity in the house

If you switch the heat source to the mode of operation on electricity, then the coolant in the system will be heated by heating elements. Yes, and with low-power operation, it is electricity that allows you to automatically maintain a constant minimum temperature of the coolant.

Installation and operating conditions of combined boilers

Unlike traditional heating units, boilers using a combination of several types of energy require special installation and maintenance conditions. It is especially important to consider these requirements for the installation process if the work is done by hand.

To begin with, it is necessary to indicate the fact that a special separate room must be allocated for such heating units in a private house. Also, it is necessary to provide a concrete cushion for the unit, equip the chimney and ventilation system. On our website you can see photos and videos of installed boilers in various houses.

Advice. If you are not confident in your own abilities, entrust all installation work to qualified specialists. Real masters will perform the entire range of work in the shortest possible time, ensuring their high quality and compliance with requirements and standards. In addition, you will have a guarantee for the work performed.

Advantages of solid fuel and electricity boilers

If we compare the combined equipment for heating country houses with traditional gas or simple solid fuel boilers, then their advantages become simply obvious:

Availability and low price of fuel. Due to the possibility of working on solid fuel, it is possible to ensure the combustion of almost any waste from the woodworking industry, the cost of which is simply a penny;
Versatility. Due to the presence of TEN heaters in the design, it is possible to receive heat from the boiler even when there is no possibility of using firewood;
Profitability. Wood and electricity are the most affordable types of fuel in our time, and therefore you can save a lot on installing a combined boiler and heating your home. Savings are especially relevant in the light of the regular rise in gas prices;
Ecological cleanliness and absence of harmful emissions from the heating system;
Availability of automation systems and special programmers. Such equipment makes it possible for the heating equipment to work in automatic mode in the absence of owners in the house;

High quality heating. Woodworking industry products, like electricity, emit a lot of heat, and therefore the heat carrier will be heated as quickly and efficiently as possible. In addition, there are no significant energy losses, as the combined equipment has a well-thought-out design;
Duration of trouble-free operation.

Conclusion

Combined heating systems are a great choice for any private home. The availability of fuel, reliability, versatility and high performance favorably distinguish the units from the total number of heating boilers on the domestic market.

All in our time, you can increasingly see combined heating boilers that are universal for a private house, operating simultaneously on two types of fuel. Combining firewood and electricity together is a pretty smart solution, such a boiler is quite reliable, compact and practical. And if there is a power outage or a lack of fuel, you will not experience discomfort from the cold or lack of hot water during the cold period.

Modern heating boilers use solid fuel, combining it with both gas and electricity, which is more relevant for consumers. When purchasing a heating boiler that works both on wood and on electricity, several problems are solved at once:

For heating, two alternative energy carriers relative to natural gas are used at once.
The issue of cooling down the premises is being solved in the case when everything in the firebox has completely burned out, and a new portion of fuel has not yet been loaded.
Makes water heating more comfortable, since you no longer have to get up in the middle of the night and go to the boiler room to load fuel.

Combined electric wood heating boilers of the latest generation with a large firebox are made in such a way that switching to electric heating occurs automatically when the water temperature in the boiler drops below a certain mark. Naturally, the reverse transition to the combustion of solid fuel occurs with the help of external actions.

The design of the electric wood boiler

Externally, the combined TT firewood boiler is in no way different from a conventional solid fuel unit. In fact, this is the same wood-burning heating boiler, the only difference is that it has a heater installed in the heat exchanger. Another important difference from the standard configuration is the presence of a water jacket.

One of the walls of such a boiler is made by cold stamping and has a complex configuration. Heating elements are installed between the walls of the shirt and there is a special contact hole to which the electrical wiring contacts are connected.

This type of heater device is similar in design to a standard solid fuel boiler, which consists of the following main elements:

firebox (combustion chamber), a place for loading solid fuel;
outside it is washed by the coolant, which is inside the water jacket;
a water-tube or fire-tube type heat exchanger, where the combustion products transfer most of the heat to water before being released into the chimney;
at the bottom of the firebox there is a grate, and under it there is an ash chamber;
firebox and ash pan in front equipped with doors;
to adjust the intensity of combustion, there is a mechanical draft regulator or a fan-blower (if there is no manual control of the air damper).

Household combined heating boilers are distinguished by the design of a water jacket, where a place is provided for the installation of a block of tubular electric heaters - heating elements. Their contacts are brought out and connected to the control panel with the help of an electric cable, and the heating part is immersed in the coolant.

How a combi boiler works

The principle of operation of a solid fuel heater, in which electric heaters are installed, is as follows:

Kindling and heating of the boiler are carried out in the usual mode. When burning solid fuel, the temperature of the coolant is maintained using a mechanical thermostat or a fan together with a sensor, and the heating elements are turned off at this time.
After the contents of the fuel chamber burn out, the temperature of the coolant in the system gradually drops to a certain value, reaching which, at the signal of the temperature sensor, the heating element (one or more) is turned on. At this point, the boiler starts to work on electricity.
After the next portion of firewood or coal is loaded, the water in the system begins to be heated from the side of the combustion chamber, the electrical part automatically turns off until the temperature of the coolant drops to a certain value.
Electrical equipment is auxiliary.
The heater control unit is used to maintain a certain water temperature, based on the readings of the air or water sensor.

Continuous heating of water is provided by switching from one mode to another, which provides comfortable conditions in a private house.

Advantages of universal boilers

After installing a combined wood-electricity heating boiler, you will receive the following bonuses:

Versatility. You will have the choice of which of the two fuels to use and when.
Due to the built-in heating elements, the coolant will maintain the set temperature even after the fuel has burned out in the loading chamber. This will maintain a comfortable temperature inside the room, and in case of your long absence, it will prevent pipes and radiators from freezing.
Comfort. Maintaining the temperature with electricity will be of great service, helping to get rid of the problem of night trips to re-load fuel into the combustion chamber.
If electricity is metered according to a multi-tariff scheme, then in addition to convenience, you can also save on the night operation of heating elements.
Thoughtful device. The heat is distributed in such a way that the loss of thermal energy is close to a minimum, thanks to which the boilers are quite efficient.
Long period of operation. If properly maintained, such a boiler can serve you for at least 20 years.
Autonomy. You do not need to constantly monitor the process - for this the unit is equipped with automation. Especially in the case of operation from electricity, the operation mode using a heating element is limited to an uninterrupted supply of electricity.
You can find models with pre-built pipes in order to be able to connect the "warm floor" system.

Heating combined boilers, which work both on wood and on electricity, cope with their task even in low-power mode.

Disadvantages of combined units

Electric heaters of a universal boiler assume only maintaining the temperature of the water in the system; they cannot completely replace the combustion of solid fuel. The reason for this is the low power of the block of heating elements, which are mounted by manufacturers on solid fuel boilers. This feature, unfortunately, is one of the serious drawbacks of combined boilers for heating a private house on wood.

Heating a private house with a combined boiler that runs on both electricity and firewood has other disadvantages.

The useful volume is taken away from the loading chamber by the block of heaters, which significantly affects the burning time from one load.
The operation of the device directly depends on the stability of the power supply.
The cost of combi boilers is much higher compared to classic solid fuel boilers.
The efficiency during operation of the heating elements drops by 2-5% due to the air flow that passes through the cooled firebox. The reason for this is the constant draft in the chimney, it forces the air out of the rooms to leave through the chimney and thereby cools the water jacket of the heater.

Do not forget one more important detail. As in the case of a classic solid fuel boiler, a combined heating boiler of the wood and electricity type must be connected to the water heating through a three-way valve, as shown in the diagram below. A small circulation circuit is necessary to protect the furnace from the negative effects of condensate during kindling.

In order to prevent the walls of the combustion chamber from being covered with condensate when the temperature drops, the solid fuel boiler must be connected according to the standard scheme with a three-way valve:

In the event that the power of the heating elements is not enough to heat the coolant to a temperature of + 55 ° C or more, then condensate will never appear in the furnace of the combined boiler during ignition, and the unit with a three-way mixing valve will not be needed. But as practice shows, a small circulation circuit, nevertheless, is necessary, at least in the event of a power outage or a breakdown of one of the heating elements.

How to choose a boiler "firewood electricity"?

Manufacturers offer combined heating boilers that run on both wood and electricity, which differ in performance, power and equipment. When buying this equipment, you need to pay attention to the following points:

Power - this parameter depends on what type of fuel is used. It is necessary to determine in advance the main type of fuel for the purchased device.
The dimensions of the combustion chamber - its volume will show how often it will be necessary to load fuel.
Noiselessness - installation of a special valve will ensure quiet operation of the unit.
Number of circuits - some models heat water only with the help of heating elements.
The most economical models are those in which the coil is mounted in the combustion chamber.
Heat exchanger. It is made from both steel and cast iron. Cast iron ones are not so susceptible to corrosion, they give off heat longer, although they heat up longer, they also have a rather serious weight, and with sudden temperature changes they can crack. Steel has less resistance to corrosion and oxidation, but they are lighter and more resistant to temperature extremes.
Grids. The material of manufacture can be very different. They can be both cast iron and ceramics. Cast iron has a higher heat resistance and is suitable for the combustion of any solid fuel. Honeycomb cast iron grate with ceramic coating is suitable for bulk materials, the combustion of which consumes more oxygen.
The weight and dimensions of the unit. Due to the large dimensions, it may be necessary to reinforce the surface area where the unit will be installed with a concrete screed.

When choosing a boiler for heating a house, you need to correctly calculate the power of the device based on the parameters of the area of \u200b\u200bthe room. This will indicate how much fuel consumption will be required. If the area of the house does not exceed 80 m2, then you do not need to buy a boiler whose capacity is designed to heat a house with an area of 400 m2. This may lead to overspending of budgetary funds for the purchase of the unit, and for its subsequent operation.

A combined wood and electricity boiler is perhaps one of the most successful solutions for heating a summer house or a small private house. In a cottage that has 2-3 floors, heating elements will only save the system from freezing. Combined boilers will help out if it is not possible to use a constant and reliable source of energy. In addition, these boilers will save you quite a lot of money if you use more expensive fuel as a fallback.

For the installation of such a boiler, it is better to use the services of a specialist who works in this profile. He will advise the most suitable device model for you and install it without unnecessary problems, based on the requirements of safety rules and technology requirements.

In recent years, autonomous heating has become more and more popular, and not only in private properties, but even in apartment buildings.

This is explained by significant cost savings and ease of use of such a system, as well as the possibility of independent decision-making on the beginning and end of the "local heating season", depending on specific weather conditions. In the conditions of apartments, certain types of boilers are installed, operating mainly on gas, and sometimes on electricity.

But in the private sector, especially located outside the city, combined heating boilers are well suited, which can work both on wood and on electricity, since it is easy to find solid wood fuel and electricity is almost always in abundance, unlike gas. Moreover, if for some reason the electricity is turned off or the supply is unstable, you can always switch to heating with wood or coal, which is extremely convenient. The preparation of solid fuel must be carried out in advance in order to always be ready for any prevailing circumstances.

The design of this heater is thoroughly thought out and works equally efficiently both on electricity and on wood.

Combined boilers differ in their structure from those that operate only on solid fuels. Their main feature is the presence of a heating element installed directly in the tank with a coolant.

Electric heater - heating element

In the lower part of the device there is a firebox in which firewood is burned. The released thermal energy heats the coolant, which is then sent to the heating circuit.

The boilers are equipped with devices that automatically turn on the heating element to achieve the set coolant temperature, if notgets power when burning solid fuel. That is, when the firewood burns out, the heat subsides, the temperature drops, at this time the heater turns on, and the boiler starts to work on electricity. The whole process takes place independently, is regulated by automation, and human participation is not required in it.

During the combustion of solid fuel, a power equal to 26–33 kW is released, which should be enough to heat a house with an area of 100 — 110 square meters, and then the electric heating element maintains the even required temperature.

Boiler structure

Boiler running on solid fuel and electricity, consists of the following main components and elements:

Body-box of the device
Firebox.
Gas outlet.
Chimney pipe.
damper.
Grate grate.
Ash blower.
Furnace door.
Blower door.
Air door.
Lever arm.
Gate lock.
Reflector.
Pressure gauge.
The casing is the body.
Front cover.
Shuttle door.
Traction regulator.
Chain.
Supply pipe.
Return pipe.
Stub.
Regulator.
Ground bolt.
Sleeve for heat limiter.
Sleeve for temperature sensor.
Sleeve for control sensor.
Drain pipe.
Nameplate with name and serial number of the boiler.
TEN.

Provided in the design of combined boilers and maintaining a minimum temperature in the circuit in cases where firewood is loaded into the furnace irregularly. This makes it possible to protect the heating system from freezing. Therefore, you can leave home for a long time without worrying that the pipes will freeze.

It is important that the device can operate at low power, only to maintain the minimum temperature in the system.

Boiler characteristics

To choose the option that is most suitable for the house in which it will be installed, you should consider all its parameters. They are indicated in the instructions, and you must definitely look into it before buying the device. These include the following items:

Boiler power during operation electricity, wood or other solid fuel.
Availability of the function of providing points of water intake with heated water (water heating circuit).
heat exchanger material. A heat exchanger made of cast iron is resistant to corrosion damage, but its main drawback is that it does not tolerate temperature extremes. Such frequent exposure can lead to cracking of the part.
If the heat exchanger is steel, then corrosion can easily damage it, but for that it is easier to tolerate changes in temperature conditions.
Be sure to check the presence of the valve, which makes the operation of the boiler safe from the possibility of overheating.
It is important to take into account the size of the fuel chamber - this will determine how often you have to put firewood into it.

The grate installed in the furnace can be made of steel or cast iron, as well as ceramics.

Cast iron grates withstand high temperatures and are suitable for any type of solid fuel. Another advantage of cast iron is that it retains the heat obtained from coals for a long time.

The boiler can operate on bulk types of solid fuels

Today, steel and ceramic grates are used more. Due to the shape of the holes in the ceramic grate, they are well suited for the use of fuel in the form of pellets, chips, sawdust and other combustible materials with a fine fraction. But the disadvantage of honeycomb holes is the need for more air to enter, i.e. you need to make sure that the blower is open in the right way, otherwise the fire may simply go out.

Important parameters are the dimensions of the boiler and its weight. The possibility of its installation in a home boiler room largely depends on this.

Chimney and boiler installation requirements

Combined boilers, according to the rules of their operation, have some features that differ somewhat from simpler designs of heating appliances. These nuances must be known at least in order for the device to be safe in everyday use.

The main condition for installation is a properly equipped chimney. It should be arranged in the same way as for a wood-burning stove.
It should have good traction, and it will provide the necessary height of the pipe head rising above the roof. This distance should be at least half a meter.

A very important condition is the flow of air into the blower chamber. To prevent carbon monoxide from unburnt fuel from entering the room, it may be necessary to arrange forced ventilation. It will help burn the fuel to the end and remove all the resulting combustion products into the ventilation pipe.
The chimney must be well insulated so that condensation does not form during the cold season from the difference between hot outgoing air and cold outside air. The accumulated moisture in the pipe can lead to the formation of ice blocking the smoke outlet. To prevent this from happening, the chimney must be insulated immediately after installing the boiler.
Such a boiler should be located in a separate room (boiler room) - in this case, its operation will be safer.

The boiler is quite large and massive

It must be remembered that the weight of the heating boiler is quite large, and can even be several hundred kilograms. This must be taken into account when installing it, since not every floor is able to withstand such a load, and it may need to be strengthened. The floor or a special foundation must be reinforced concrete, otherwise they may simply sag.

Single-circuit heating boiler on wood and electricity

To install such a boiler, it is better to contact the masters working on this profile for help. They will competently advise the best model of the device, and install it without any problems, based on safety rules and technology requirements.

When choosing a method of autonomous heating, owners of a private house often face a difficult choice. On the one hand, you should choose a model for the cheapest fuel so that heating costs are minimal. On the other hand, it is difficult to get full confidence in the possibility of a continuous supply of energy, which is especially true for centralized pipelines (gas, electricity).

Therefore, combined options are becoming increasingly popular, for example, a wood and gas boiler. This is the only way to guarantee that the heating season will run with a stable heat supply. Moreover, the choice is not limited to such modifications. Pellets are combined with electricity, coal with wood models, for example, as in combined boilers. Universal heaters easily allow you to bypass seasonal tariff increases, as well as, for example, use nightly price reductions, etc.

Combined modifications, for example, a wood-gas-electricity heater, are often installed to replace old wood-burning stoves or their coal-fired counterparts. firewood and coal are the most affordable in all regions of our country, while they have a relatively low price. The heating system itself is often not redone, limited to replacing a wood-burning boiler with a combined model.

Varieties of combined boilers

Separate universal heating equipment depending on the type of fuel used.

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combined boilers

So, the following combined options are distinguished:

Gas + Solid fuel. Allows you to quickly replace the main gas when it was turned off as a result, for example, of an accident on the line. A wood and gas boiler is one of the most popular solutions due to the good availability of wood.
Gas + Liquid fuel. Such options are convenient in case of periodic failures in gas supply, but require the organization of storage of diesel fuel stocks.
Gas + Electricity + Liquid fuel. A combined option for savings in the absence of a guarantee of timely supplies of gas and diesel fuel.
Gas + Solid and liquid fuel. One of the most versatile models for heating cottages. Great replacement for wood burning stoves.
Gas + Solid and liquid fuel + Electricity. This model makes the owner of a private house completely independent of tariffs and other factors that affect the change of energy carrier. For example, a wood-gas-electricity appliance.

There are universal boilers without connection to a gas main, for example, for coal and firewood with the ability to connect heating elements to be powered by electricity. Heating boilers combined gas firewood are often installed in conditions of interruptions in gas supply. Firewood for heating, including special granules (pellets), causes less inconvenience during storage than other types of fuel. Yes, and there is no smell, as, for example, from diesel fuel (and a gas boiler, sometimes, gives a slight smell).

Another option - a combined gas-firewood-electricity boiler - allows you to become completely autonomous with any changes in tariffs and in other situations. For a wood-gas-electricity device, you don’t have to worry about the same firewood stocks, power outages, etc.

Features of gas-fired boilers for the home

First of all, it is worth noting that in most cases, the gas main is taken as the main fuel, and they switch to wood heating in the event of a shutdown for periods of maintenance or accidents. Of course, for a completely universal approach, it is worth installing a combined wood-gas-electricity appliance, but not everyone can be satisfied with the cost of electricity.

In general, combined boilers can be fired with different solid fuels, almost without changes in its design. So, firewood, coal, briquettes, pellets - everything is on the same level in terms of prevalence, the choice depends on the price of various types in a particular region. That is why gas-fired boilers are popular, solid fuel is easy to replace with an analogue.

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Secondly, it is important to consider that solid fuel boilers are made of steel and cast iron, which makes them resistant to constant high temperatures during the heating season. This is especially important if coal is used as fuel, which gives a noticeably higher temperature in the furnace.

But that also adds to the hassle. The heavy weight of the equipment in some cases requires the strengthening of the flooring in the room in the house allocated for its installation. Cast iron boilers for heating gas-firewood require this without fail. Gas-fired modifications made of light grades of metal can be mounted on a regular floor, in place of a previously occupied wood or coal stove. Wood-gas-electricity appliances are usually light in weight.

There are two more types of combined models: single-circuit (they work only for heating the heating system) and double-circuit (the second circuit heats water for the water supply system in the house). So, the gas-firewood device can be used as a boiler even in the warm season. The same applies to the device firewood-gas-electricity.

It is also worth noting this feature. In addition to the removal of smoke through the pipe when burning with solid fuels, there are solid combustion products that settle in the pan and require periodic disposal.

The most interesting for heating boilers are universal gas-firewood-pellets, which have the ability to work autonomously without human intervention for a long time. Such a heater, instead of wood or gas, is able to work with special granules. Such a combined option eliminates the need to stock up on firewood, because. pellets are usually always on sale. Alternatively, a combined boiler is still convenient.

The most advantageous sides of boilers heating gas firewood

If we put aside the requirements for arranging a separate room in the house, combined wood-fired gas heating boilers will have a whole set of excellent qualities.

The operation of such a universal heating device does not require special skills. Even options such as combi boilers.
The cost of combined models is slightly higher than analogues that can only work, for example, with coal, pellets and a gas version. You can mount it instead of a wood-burning stove, they take up even less space than usual.
The dimensions of a gas-fired heating model, of course, are larger than gas models, but do not exceed analogues with a wood-burning firebox. The wood-gas-electricity device has the same dimensions.
High efficiency - up to 90%. The wood-burning method of heating a room is one of the most effective, the main thing is to use dry, no more than 20% humidity, firewood.
Small emission of harmful substances into the atmosphere.

Compared to heating with electricity or gas boilers, combined gas-fired heating boilers can provide complete independence from utilities. Wood stoves have always been used as the basis of warm home comfort, because. this type of fuel is the easiest to get anywhere.

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What to pay attention to?

When selecting a model, it is necessary to take into account several rules, non-observance of which will lead to an error. As a result, the boiler may not be suitable for a particular house, for example, it may not be powerful enough and the room will be cold. For example, a wood and gas appliance is dependent on the pressure in the line, and when it is lowered, it can give off noticeably less heat.

In technical specifications, in addition to power, the area of \u200b\u200bthe house for which it is designed is usually indicated. The calculations are made by professionals and it is quite accurate. You can use various tables found on the Internet. Particular attention should be paid to power when choosing the most versatile options, such as a wood-gas-electricity appliance.

It is worth considering the possible decrease in gas pressure in the line. This can significantly reduce the heating power. In the absence of a “reserve”, you will also have to use additional heaters powered by electricity. There is no point in heating with such characteristics, it will have to be modernized and incur additional costs.

The next step is to determine the purpose of the combined boiler for heating. It can be purchased both as the main source of heat and for additional heating of running water, i.e. immediately choose the combined option.

Such a boiler is more profitable than a separate boiler, because wood or gas is already consumed for heating, and a separate water heater is usually powered by electricity. Wood heating often allows you to win also in the speed of reaching the desired temperature.

Are there any features in operation?

When buying a combined boiler with wood and gas heating, several operational points must be taken into account, without which the use of firewood as the main source of heat can lead to the fact that the universal method will cause considerable problems.

So, a wood-burning boiler during its operation gradually clogs the chimney with soot, which must be periodically cleaned. Without this, the efficiency of smoke removal will gradually decrease, up to the appearance of problems with ignition, smoke in the room, etc.

Rice. four

If heating on gas or electricity can operate continuously, then the wood-burning boiler burns out completely after a maximum of 3-4 hours, after which the heating system inevitably begins to cool down. Loading a new portion is done manually, which requires the presence of the owner's home. Therefore, often combined modifications with wood or pellet fuels are used, if possible, in gas heating mode.

Pellets partly allow you to automate the procedure for heating with wood fuel, but you still have to follow the process. Yes, and the stock must be created in advance, otherwise you can be left without heating in the coldest period of the year.