Recently, more and more often can be found in private universal combined heating boilers, which can work simultaneously on two types of fuel. The combination of electricity - firewood is an excellent choice: such a boiler is very compact, practical and reliable. In case of disconnection of electricity or lack of fuel, you will not be left without heat and hot water in winter.

Externally, the combined boiler is practically no different from an ordinary solid fuel unit. In principle, it is the same wood heating boiler, which in the heat exchanger is mounted by TEN. Another important difference can be called a water shirt design. One of the walls of the firebox of such a boiler has a complex configuration and is made by the method of cold stamping. Between the walls of the shirt is mounted by the lands, and there is a special pin hole to which the wires of wiring wires are connected.

Combined boiler: Firewood - Electricity

Combined boilers, which work on firewood and electricity, are designed very competently and thoughtful, the main working nodes are:

• luke loading solid fuel - hard fuel loaded into it, the volume of loaded fuel depends on its size at once;
• solnik- applies oxygen for combustion of fuel and collects ash;
• the burners allow you to move from one type of fuel to another;
• tractor - regulates the intensity of combustion of fuel. The chain drive opens or closes the flap of the ash chamber;
• heat exchanger - provides warm water supply;
• temperature sensors - automatically adjust the operation of the Tan, which ensures the continuity of heating.

The automation system allows you to adjust the boiler mode, as well as its power. There are models of boilers, which provide cooking panels for cooking, they are installed above the furnace. Two-circuit boilers allow you to connect the "warm floor" system, there are special outputs for installation.

The device of the combined boiler

Release boilers with one contour and with two contours. In the first case, the boiler is used only for heating, in the second - will provide hot water for economic needs. Also on sale there are aggregates with a manual control system and with automatic. Boilers with a manual control system are cheaper, and automatic control facilitates the service and life of the owner.

Council. When choosing a boiler for home heating, it is necessary to correctly calculate the power of the device based on the room area. From this will depend on fuel consumption.

Principle of operation

The principle of operation of the combined heating boiler is quite simple. The thermal generator operating from the mains is running the electric heater. Pipe electrical heaters begin to heat the coolant (water) in automatic mode on the principle of the boiler. This process is automated by a special device, manually loaded firewood into the furnace.

While the TEN warms the water, it is necessary to fill the filling chamber with firewood and set fire. The furnace chamber is downstairs and transmits heat from burning firewood heat exchanger. When the temperature of the coolant reaches a given mark, the TEN is disabled, and then heat generates only firewood. Fire burning power can reach a value of 30 kW, it is enough to heating at home.

The work of the combined boiler

When burning firewood, the TEN is turned on again and maintains the specified temperature. You can turn only to firewood, and the TEN is turned on only for the safety net. If the firewood ended, the heat will only provide a TEN. But often electricity and firewood are used at the same time, it is especially convenient at night, when there is no possibility to constantly put firewood in the firewood. Then evening lay firewood, and the TEN is included to maintain heat not at full capacity.

If electricity is used in priority for heating, and firewood only as a reserve, the boiler service is simplified to a minimum. The desired temperature is displayed and the TEN is responsible for maintaining it. When the electricity is disconnected, as often happens in our country, make a laying of firewood in the furnace, and the boiler begins to work on hard fuel.

Important. When the boiler is running on firewood, make sure that the chimney valve is in the open state. When working on electricity, the valve can be closed.

Advantages of combined boilers

Advantages of boilersworking on firewood and electricity in comparison with devices operating in one form of fuel are obvious.

Combined boiler with retainable ten

1. Universality. You can use one of two types of fuel at its discretion.
2. Efficiency. Electrical energy is the most affordable fuel type, wood - too. In addition, as an alternative, the carbon and waste of the woodworking industry can be used. The perfect union is obtained: the tree is electricity.
3. Thoughtful design. Heat competently distributed and energy loss is minimal, which makes these boilers are very effective.
4. Long service life. With the correct operation, such a boiler will serve you faithfully for a very long time, not less than 20 years old.
5. Autonomy. There is no need to control the process constantly - the automation will do everything for you. Moreover, when working on electric fuel, heating mode with the AID was limited to uninterrupted electricity supply.
6. There are models with built-in connections in advance to connect the "Warm floor" system.

Important. Combined boilers working on firewood and electricity are effectively working even on low-power modes.

disadvantages

And yet, with all the advantages, the combined boilers have disadvantages, as well as from any other heating equipment.

The combined boiler is better installed on a preliminary basis

1. It is necessary to equip a separate room - boiler room, it is also necessary to storing the fuel reserve.
2. Weight. The devices made of cast iron can weigh several hundred kilograms, before installing such a boiler, a concrete cushion device may be required to enhance the base of the floor. Due to the significant weight of the product, models for mounting on the wall are not produced, only models for floor installation.
3. The design of the combined boilers is more complicated, which affects the cost of mounting and service repair.
4. Another disadvantage is the low power of the electrical component. The power of the electrical heaters should not exceed the power of the wood chamber. The power range of wood firebox in the range of 6 - 25 kW.
5. The cost of models of combined boilers is 20-40% more expensive than similar boilers working on solid fuel, but their acquisition is much more justified than the installation of one type of boilers and then further replacement for another.

The manufacturer offers combined heating boilers operating on electricity and firewood of various power, configuration and performance. By purchasing such equipment, pay attention to such moments.

Think out how much fuel you need to lay at a time

1. Power - depends on what fuel is used. Decide in advance what kind of fuel will work the aggregates priority.
2. The size of the furnace chamber - from the volume of the furnace depends on how often the fuel will be loaded.
3. Silent - Installing a special valve provides a quiet operation of the unit.
4. The number of circuits - in some models, water heating is carried out only by Tan. More economical models, whose coolant coil is mounted in a flue chamber.
5. Heat exchanger. It is possible its manufacture of cast iron or steel. Cast iron devices are resistant to corrosion, heated long, but also give heat for a long time, have a significant mass and can crack with a sharp temperature drop. Steel susceptible to faster oxidation and corrosion, more lungs in weight and resistant to temperature drops.
6. Copyright. Produced from various materials. It may be cast iron or ceramics. Cast iron more heat-resistant and are suitable for combustion of any hard fuel. Use cellular cast iron semi-ceramic spraying, they are suitable for bulk materials, which are used with more oxygen.
7. Weight and dimensions of the boiler. It may be necessary to strengthen the surface area to which the unit will be installed, a concrete tie.

If there is no gas in the house, then this is not a trouble - you can dump it with firewood, purchased or distorted in the forest. In addition, solid fuel boilers can also work on other types of solid fuels. Also on sale there are combined units connected to the power grid. Heating boilers for a private house on firewood and electricity are more convenient to operate, compared with their traditional colleagues. Let's look, it's for equipment, how it works and what is their advantages.

Features of boilers on firewood and electricity

The traditional solid fuel boiler is a wood stove with a built-in heat exchanger, providing the heating system with a hot heat carrier. Frames are placed in its furnace, fun burning and generating heat energy absorbed by the coil. And in order for the house there is always warm, it is necessary to throw all new lamps in the furnace - even at night. That is, instead of sleeping, you will have to get up and stammer to an insatiable unit.

Boilers of heating on firewood deliver inconvenience even during the day. Length in them go beyond very quickly. If you do not follow the level of flame, the heating will cool down, the house will become more comfortable in the house. This problem is solved in the following ways:

• Purchase of pyrolysis aggregates and models with large floors;
• Acquisition of pellet boilers with automatic fuel supply;
• Installation of boiler running on firewood and electricity.

The cheapest is the last option. Pyrolysis aggregates are distinguished by complexity and high cost, the same shortcomings are inherent in pellet samples. But the boilers and furnaces on firewood and electricity have an affordable price.

Electro-wood boiler is a conventional solid fuel apparatus on firewood. But as soon as the firewood ended in its lack, and the temperature of the coolant falls below the specified level, the TEN is turned on (or several shades at once). It supports the temperature in the circuit, not allowing it to cool quickly.

Tanes are responsible for supporting the temperature, they are not able to warm the house only due to their power. They also allow the gradual cooling of the coolant, but for several hours they are enough.

Temperature control is embedded or external - separate models are equipped with built-in thermostats.

Solid fuel combined boilers are endowed with one or two Tanes of limited power. As a power source, single-phase and three-phase networks protrude (more often single-phase).

Advantages and disadvantages of boilers on firewood and electricity

Boilers for heating on firewood and electricity are characterized by the following pluses:

• The presence of temperature regime support - prevents too fast cooler cooler;
• Balanced cost - the equipment is characterized by its low cost, which will still be told in our review;
• No additional maintenance, as required by combined devices with liquid and gas burners.

Having installed a heating boiler in your house on firewood and electricity, you will not jump at night for bookmarking a portion of firewood.

It did not cost without traditional minuses - it is high electricity consumption and the need for rolling electrical wiring.

Popular models

Let's see how to choose a combined heating boiler "Firewood - electricity" for home heating. The main parameter here is the power of the device. Usually by 10 square meters. The heated area requires 1 kW of thermal energy. Also do not forget about 15-20% of the reserve in case of cold winters.

Tanes in boilers working on firewood and electricity can be optional or built-in. In the first case, they will have to be purchased separately, and in the second they are supplied in the original configuration. It would be nice if the thermostat was already present on board to support the temperature - then it would not have to be bought separately. It is also necessary to estimate the power of the Tan used, since the samples with a power of 8-9 kW and above work from three-phase networks.

Before us is a typical boiler on firewood and electricity for heating a large square home - up to 200 square meters. m. It is non-volatile, but comes with an already pre-installed block of Tannov, the power of which is 9 kW. Model single-mounted, designed for traditional floor installation. Combustion chambers - open, it burns briquetted fuel, stone coal, firewood and other types of solid fuel.

If you are going to buy this boiler, you make a profitable purchase. After all, it can work not only on firewood and electricity, but also on gas - for this, a plug-in gas burner is purchased. The cost of this model in online stores varies within 22-28 thousand rubles.

Electric wood heating furnaces are in demand among those who are tired of freezing when the fire is attenuation in the furnace. Using the model ZOTA poplar M20, you will receive at your disposal a powerful heating device from a well-known brand. Its capacity is 20 kW, efficiency - 75%, control is mechanical. There is an opportunity to work from electricity, but for this you will have to purchase a Block of the Tan. The boiler is omnivorous, he burns firewood, coal and anthracite. The estimated value in the Russian market is about 36,000 rubles.

The company GEFEST produces not only well-known gas and electric furnaces throughout Russia, but also boilers are heating for a private house on firewood and electricity. A typical example is the above model. It is made in a simple rectangular housing, devoid of every hint of design. The sample power is 25 kW, heated area - up to 250 square meters. The CPD is up to 82%, this is a rather high indicator.

Despite the seeming simplicity, the GEFEST CSTG-25 boiler on firewood and electricity is not at all as simple as it seems. The thing is that it is a two-circuit - it gives heat and hot water. The performance of the DHW circuit is 8.5 l / min by changing the temperature by 35 degrees. The primary heat exchanger is made of steel, secondary - from copper. As soon as we get tired of spending firewood and electricity, the device can be switched to the gas, whenking the burner to it.

Well, who knows how to make good boilers, equally well-working on firewood and electricity, so these are Siberian manufacturers. The presented model has a capacity of up to 12 kW and can heat the area up to 100 square meters. m, spending up to 3.2 kg of fuel per hour. As soon as the firewood in the furnace is suitable by the end, the electric heater will turn on - it will support the temperature in the heating circuit and will not give it to cool until the next fuel boot.

Boiler on firewood and electricity Sibenergoterm Prometheus 12m-5 12 kW works not only on firewood, but also on other types of fuel are coal and coal briquettes. Moreover, coal acts as recommended for this model fuel. Separately pleases the high efficiency of the model that makes up 84 kW. Also in its designs have an air vent and safety valve. Tanes for work from the power grid are purchased separately.

This boiler that can work on electricity and firewood is combined, because the gas burner is also connected to it. The capacity of the device is 16 kW, which is enough for heating houses with an area of \u200b\u200bup to 160 square meters. m. Fuel for this model is traditional firewood, coal and wood briquettes, as well as coal. The Block of the Tan is already pre-installed, it is not necessary to purchase anything additionally. The device is one of the most affordable, its average cost is about 24 thousand rubles. For this money, consumers receive almost omivorous techniques.

All in our time can still be seen universal for private house combined heating boilers operating simultaneously on two types of fuel. Complete together firewood and electricity is a rather smart solution, such a boiler is quite reliable, compact and practical. And when the electricity is disconnected or the lack of fuel you will not have discomfort from the cold or the absence of hot water in the cold period.

Modern boilers are using solid fuel, combining it with both gas and electricity, which is more relevant to consumers. When purchasing a boiler of heating working both on firewood and from electricity, several problems are solved at once:

1. For heating, two alternative energy carriers relative to natural gas are used.
2. The question is solved with the heating of premises in the case when in the fuel button completely all burned down, and the new portion of fuel has not yet been loaded.
3. Makes more comfortable water heating, as you do not need to go up in the middle of the night and go to the boiler room to load the fuel.

Combined electro-wood heating boilers of the latest generation with a large firebox are made so that switching to electric heating occurs automatically when the water temperature in the boiler falls below a certain mark. Naturally the reverse transition to burning solid fuel occurs with external actions.

Electro-wood boiler design

Outwardly combined TT Boiler Firewood Electricity is in no way different from a conventional solid fuel unit. In fact, it is the same wood-haule boiler, the only difference of it is that a TEN is installed in the heat exchanger. An important difference from the standard configuration is the presence of a water shirt.

One of the walls of such a boiler is made by the method of cold stamping and has a complex configuration. Between the walls of the shirt are tagged and there is a special contact hole to which electrical wiring contacts.

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

• topial (combustion chamber), place to load solid fuels;
• outside it is washes the coolant, which is inside a water shirt;
• heat exchanger of water-tube or winter-tube type, where combustion products most of the heat before emissions in the chimney are transmitted to water;
• at the bottom of the fuel, there is a grate grille, and under it an ash camera;
• firecase and ashpan in front equipped with doors;
• to adjust the burning intensity there is a mechanical thrust regulator or a fan-supercharger air (if there is no manual air damper control).

Household combined heating boilers are distinguished by a water shirt device, where the place is provided for the installation of the block of tubular electric heaters - Tan. Their contacts are removed and with the help of the electrocable are connected to the control panel, and the heating part is immersed in the coolant.

How the combination type boiler works

The principle of operation of a solid fuel heater, which has electrically heaters, is as follows:

1. Machine and heating of the boiler are carried out as usual. When burning solid fuel, the temperature of the coolant is supported using a mechanical thermostat or a fan together with the sensor, and the Tanes are disconnected at this time.
2. After the contents of the fuel chamber struggle, the coolant temperature in the system gradually drops to a certain value, reaching the temperature sensor signal (one or more). At this point, the boiler begins to work from electricity.
3. After the next portion of firewood or coal is loaded, water in the system begins to warm on the side of the combustion chamber, the electrical part is automatically turned off until the temperature of the coolant falls to a certain value.
4. Electrical equipment is auxiliary.
5. The heater control unit is used to maintain a certain temperature of the water, based on the readings of the air or water sensor.

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

Advantages of universal boilers

After mounting the combined heating boiler type of firewood - electricity, you will receive the following bonuses:

1. Universality. You will have a choice which of two fuels to use and when.
2. Because of the built-in TENOV, the coolant will save the set temperature even after the fuel has been burned in the boot chamber. This will keep the comfortable temperature inside the room, and in the case of your long lack there will be no frozen pipes and radiators.
3. Comfort. Maintaining temperatures with electricity will have a huge service, helping to get rid of the problem of night hikes for the new fuel boot into the combustion chamber.
4. If the electricity accounting is made on a multitariff scheme, then besides convenience, you can still save on the night work of the Tan.
5. Fashionable device. 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.
6. Long period of operation. If a boiler can be properly operated to stop you at least 20 years.
7. Autonomy. No need to constantly monitor the process - for this, the unit is equipped with automatic. Especially in the case of electricity, the mode of operation with the help of the TEN is limited to the uninterrupted supply of electricity.
8. You can meet models with built-in connections in order to be able to connect the "warm floor" system.

Heating combined boilers, which work on firewood and on electricity, copier with their task even with low-power mode.

Disadvantages of combined aggregates

The electrical heaters of the universal boiler assume only the maintenance of water temperature in the system, the complete replacement of the combustion of solid fuel they will not be able. The reason for this is the small power of the Tan block, which are mounted by manufacturers on solid fuel boilers. This feature, unfortunately, is one of the serious shortcomings of the combined boilers for heating a private house on firewood.

The heating of a private house with the help of a combined boiler that also has other disadvantages from the electricity and firewood.

1. The loading chamber takes the useful volume of the heater unit, which significantly affects the duration of burning from one load.
2. The operation of the device directly depends on the stability of power supply.
3. The cost of combining boilers is much higher compared to classical variants of solid fuel boilers.
4. The efficiency during the operation of the Tannes drops by 2-5% due to the airflow, which passes through the cooled furnace. The reason for this is the constant thrust in the chimney, it makes the air out of the room go through the chimney and thereby cools the water shirt of the heater.

Do not forget another important item. As in the case of a classic solid fuel boiler, a combined heating boiler type on firewood and electricity must be connected to water heating through a three-way valve, as shown in the diagram below. The small circulation circuit is necessary to protect the firebox from the negative effects of condensate during the crossing.

In order for the temperature of the combustion chamber wall with condensate, the solid fuel boiler must be connected according to a standard diagram with a three-way valve.

In that case, if there is no power of the Tannes to heat the coolant to the temperature + 55 ° C or more, then condensate will never appear in the combination of the combined boiler during the ignition, and the node with a three-way mixing valve will not be needed. But as practice shows, a small circulation contour, nevertheless, is needed, at least in case of disconnection of electricity or breakage of one of the Tannes.

How to choose the boiler "Firewood electricity"?

Manufacturers offer combined heating boilers, working on firewood and on electricity, which differ in performance, power and configuration. When buying this equipment, you must pay attention to the following points:

1. 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 acquired device.
2. The size of the combustion chamber is its volume to show how often the fuel will be loaded.
3. Noiselessness - installation of a special valve will allow to provide a quiet work of the aggregate.
4. The number of contours - some models are heated by water only with the help of Tan.
5. The most economical models are those whose serpent is mounted in a flue chamber.
6. Heat exchanger. It can be made like steel and cast iron. Cast iron is not so strongly subject to corrosion, they are warm longer, although they are heated longer, they also have quite serious weight, and with sharp drops of temperatures they can crack. It has a smaller resistance to corrosion and oxidation, but they are lighter and resistant to temperature differences.
7. Copyright. Production material can be the most different. They can be both cast iron and ceramics. Cast iron has a higher heat resistance and they are suitable for combustion of any solid fuel. Cellular cast iron sediments with ceramic spouts are suitable for bulk materials, with a greater amount of oxygen.
8. Weight and dimensions of the aggregate. Because of the large dimensions, it may be necessary to strengthen the surface area where the unit will be set by a concrete screed.

During the choice of a boiler for heating at home, you need to correctly calculate the power of the device based on the parameters of the room area. This will indicate which fuel consumption will be required. If the area of \u200b\u200bthe house does not exceed 80 m2, then you do not need to buy the boiler with the capacity of which is designed to heat the house with an area of \u200b\u200b400 m2. This may entail the recalculation of budgetary funds for the purchase of an aggregate and its subsequent operation.

The combined boiler on firewood and electricity is, perhaps, one of the most successful solutions for the heating of the cottage or private house of a small area. In the cottage, which has 2-3 floors, the Teni will only save the freezing system. Combined boilers will be carelined if there is no possibility to take advantage of a constant and reliable source of energy. In addition, these boilers will quite seriously save money if you use more expensive fuel as a backup option.

To install such a boiler, it is better to use the services of a specialist who works on this profile. It will advise the most appropriate device model for you and it will establish it without any problems based on the requirements of the security rules and technology requirements.

When choosing a way of autonomous heating to the owners of a private house, it is often necessary to have a hard choice. On the one hand, you should choose the model for the cheapest fuel so that the cost of heating is minimal. On the other hand, it is difficult to obtain complete confidence in the possibility of continuous energy supply, which is particularly related to centralized highways (gas, electricity).

Therefore, combined options are becoming increasingly popular, such as boiling on firewood and gas. This can only be guaranteed: the heating season will pass with a stable heat supply. And such modifications the choice is not limited. Pellets are combined with electricity, coal with wood models, for example, as in combined boilers. Universal heaters easily allow to bypass seasonal rates of tariffs, as well as, for example, to use night drops, etc.

Combined modifications, for example, a heating device of firewood-gas-electricity, are often installed instead of old wood stoves or their coal counterparts, because Firewood and coal are most accessible in all regions of our country, while have a relatively small price. The heating system itself is often not converted, limited to the replacement of the wood boiler with a combined model.

Varieties of combined boilers

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

Fig. one Interior design
Combined boilers

So, the following combined options distinguish:

• Gas + solid fuel. Allows you to quickly replace the main gas when it is turned off as a result, for example, the accident accident. The boiler on firewood and gas is one of the most popular decisions in mind the good accessibility of wood.
• GAZ + liquid fuel. Such options are convenient for periodic failures in gas supply, but require the organization of storage of solar reserves.
• Gas + electricity + liquid fuel. Combined option for savings in the absence of a guarantee of timely supply of gas and diesel fuel.
• Gas + solid and liquid fuel. One of the most multifunctional models for heating cottages. Excellent replacement of wood furnaces.
• Gas + solid and liquid fuel + electricity. Such a model makes the owner of a private house completely independent of tariffs and other factors that do not affect the change of energy carrier. For example, the device of firewood-gas-electricity.

There are universal boilers without connecting to a gas highway, for example, for coal and firewood with the possibility of connecting the Tan to power from electricity. Heating boilers Combined firewood gas are often established under gas supply interruption. Firewood for heating, including special granules (pellets) when stored causes less inconvenience than other types of fuel. Yes, and there is no smell, as, for example, from diesel fuel (and a gas boiler, it happens, gives a small smell).

Another option is a combined gas-firewood boiler - allows you to become completely autonomous with any changes in tariffs and in other situations. For the device firewood-gas-electricity, you can not take care of the reserves of the same firewood, turning off electricity, etc.

Features of gas production boilers for home

First of all, it is worth noting that in most cases the gas highway takes the main fuel, and it is transferred to wood heating in the event of a disconnection for periods of maintenance or accidents. Of course, for a fully universal approach, it is worth installing a combined device of firewood-gas-electricity, but not all can arrange the cost of electricity.

In general, combined boilers can be treated with different solid fuel, almost unchanged in its design. So, firewood, coal, briquettes, pellets - everything is worth on the same level by the degree of prevalence, the choice depends on the price of various species in one or another region. That is why gas-wood boilers are popular, solid fuel is easy to replace the analogue.

Fig. 2.

Secondly, it is important to take into account that heating boilers on solid fuel made of steel and cast iron, which makes it possible to make them resistant to a constant high temperature during the heating season. This is especially important if coal giving a noticeably higher temperature in the furnace is used as fuel.

But it also adds trouble. The high weight of the equipment in some cases requires the enhancement of the flooring in the room in the house allocated for its installation. Cast iron boilers Heating gas-firewood This requires necessarily. Gas production modifications from lightweight metal varieties can be mounted on the usual floor, to the place occupied earlier with a wood-level or coal oven. Firewood-gas-electricity devices are usually a small weight.

Two more varieties of combined models are distinguished: single-circuit (work only on heating heating) and double-circuit (the second circuit heats the 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 instrument of firewood-gas-electricity.

It is also worth noting also such a feature. In addition to the removal of smoke through a pipe with solid fuel, there are solid combustion products that settle in the pallet and requiring periodic recycling.

The most interesting for heating boilers Universal Gas Food-Pellets, with the possibility of autonomous work without the participation of a person for a long time. Such a heater instead of firewood or gas can work with special granules. Such a combined option eliminates the need to stock firewood, because Pellets are usually available on sale. Alternatively, a combined boiler is still convenient.

The most favorable sides of boilers of heating gas firewood

If you drop in the direction of the requirements for the arrangement of a separate room in the house, the heating boilers of combined firewood gas will take a whole set of excellent qualities.

• Operation of such a universal heating device does not require special skills. Even such options as combined boilers.
• The cost of combined models of slightly exceeds the analogues capable of working only, for example, with coal, pellets and a gas option. It is possible to mount it instead of a wood-burning furnace, they occupy space even less than usual.
• The dimensions of the gas-breeding heating model, of course, more gas models, but do not exceed analogues with wood firebox. The device of firewood-gas-electricity has the same dimensions.
• High efficiency - up to 90%. The wood heating method is one of the most efficient, most importantly, use dry, no more than 20% humidity, firewood.
• Small emission of harmful substances into the atmosphere.

Compared to heating with electricity or gas boilers, heating boilers combined firewood gas are able to give complete independence from utility services. Wood furnaces have always been used as the basis of a warm home coat, because This type of fuel is easiest to get anywhere.

Fig. 3.

What to pay attention to?

When selecting the model, it is necessary to take into account several rules, the non-compliance of which will lead to an error. As a result, the boiler may be unsuitable for a particular home, so, it may not be enough powerful and will be cold in the room. For example, the device on firewood and gas depends on the pressure in the highway, and when it decreases it can give noticeably less heat.

In technical characteristics, in addition to power, the area of \u200b\u200bthe house is specified on which it is designed. Calculations are made by professionals and it is quite accurate. You can use various tables found on the Internet. Special attention to the power must be converted when choosing the most universal options, as a device of firewood-gas-electricity.

It is worth considering the possible reduction of gas pressure in the highway. This may noticeably reduce the power of heating. In the absence of "stock" will have to use even additional heaters working from electricity. There is no point in heating with such characteristics, it will have to upgrade it and carry additional costs.

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

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

Are there any features in operation?

When buying a combined boiler with wood and gas heating, it is necessary to take into account several operating moments, without complying with the use of firewood as the main source of heat can lead to the fact that the universal method causes considerable problems.

So, a wood boiler during his work gradually litters the chimney of the soot, which must be cleaned periodically. Without this, the efficiency of removal of smoke will gradually decrease, up to the appearance of problems with the ignition, smoking the room, and the like.

Fig. four

If the heating on gas or electricity can work continuously, then the wood boiler is completely roasting the maximum after 3-4 hours, after which the heating system inevitably begins to cool. Loading a new portion is carried out manually, which requires the home of the owner. Therefore, often combined modifications with wood or pellet fuels are used as possible in the heating mode from gas.

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

Combined boilers: electricity firewood

Combined boilers: Main advantages

Gas is the optimal energy carrier for the heat generator in a private house, it is environmentally friendly and inexpensive. Heating devices operating on such fuel do not require constant maintenance (such as solid fuel boilers). But the point is to work the pressure of 3.5 mbar, and it is non-permanent.

Combined heating boilers for a private house make it possible to reduce the risks of the supply of energy supply, and when these interruptions occur, the device automatically switches to alternative fuel. Thanks to this mechanism, the owners of the house do not have to independently switch the device - such a boiler will not give me to frozen under any circumstances.

The autonomous work of these devices is not deprived of certain drawbacks:

• they are pretty heavy and cumbersome, therefore, they are only produced in the outdoor performance;
• it requires a separate room for their installation;
• the complex design of devices predetermined problems with repair and service.

Types of combined boilers

Combined boilers are divided into combinations of the type of energy used. Such devices can use all existing types of coolant:

• electricity;
• solid fuel;
• liquid fuel;
• natural gas.

Some models of heat generators can use only two types of fuel, for example, electricity-firewood or gas-electricity, and the most advanced models can work with all types of energy. When you consider models of combined heating devices in the store, it is immediately incomprehensible, which type of energy is used in it. Certique this question is a special marking present at all combined boilers.

For example, the TG mark, suggests that the device can work on gas and solid fuel, and the TE marking indicates that the boiler works on electricity and solid fuel. The most advanced aggregates are labeled "TGE". The design of these devices has a gas and liquid-fuel burner, a firebox for solid fuel and electric tagnes. Therefore, such devices are capable of providing complete autonomy.

Pretty popular among summer residents, the dwellings of which are in the villages with the gas pipeline, the boiler combined gas firewood. This is justified by the fact that in many country villages, the gas is carried out, but pressure and filing failures are possible, as mentioned earlier. Also such aggregates are used in remote private homes where gas producers are installed. If the gas supply is abruptly interrupted, there will be an alternative to the transition to another power source - solid fuel.

Most popularity in consumers are the boilers heating combined firewood electricity. Such popularity is explained by the relatively small cost compared to TGE models and the availability of the energy carrier. Electricity, unlike gas, is even in the most remote places, and it is not difficult to stock firewested.

Benefits

In such boilers, solid fuel acts as the main one, and electricity serves only to maintain a comfortable temperature in the house. Modern models can transition automatically by time or to achieve a certain temperature indoor. It is especially convenient to use electricity at night, when during sleep the owner cannot personally control the combustion process of firewood.

The most important advantage of the aggregate is to use at night a two-year-tariff meter for electricity. The ideal economical system is heating at night, and in the afternoon, only the temperature support for firewood and use them when problems with the main power source.

How to choose a firewood boiler electricity

Combined firewood boiler Electricity can be single or dual circuit. In the first case, the unit only drives the room, and in the second - also heats the water for household needs. If you decide to stop the choice on this type of combined boilers, then when buying a heat generator of this type, attention should be paid to the following nuances:

• the volume of the furnace;
• the possibility of silent work;
• the power of the heat generator;
• weight of the aggregate;
• material of grate;
• heat exchanger material.

The last two points should be clarified by more details, since the efficiency and duration of the combined boiler service depends on them. Copyright can be performed from cast iron or ceramics. Cast iron is preferable in the case when firewood is used as solid fuels, they are more heat-resistant. Ceramic grinds are suitable in the case when it is planned to use bulk fuel - pellets, straw, sawdust.

Heat exchanger material

The heat exchanger can be made of carbon steel, cast iron or stainless steel. The first option is well tolerating temperature differences, but is subject to corrosion. However, this deficiency can be eliminated if it does not use water as a coolant, but non-freezing liquid.

The coolants made of stainless steel and cast iron are not subject to corrosion, but the cast iron is poorly tolerates harsh temperature differences and mechanical damage, and stainless steel heat exchanger has a twice as long as life.

What to pay attention to, choosing a boiler for heating a private house combined

Before choosing a combined boiler, you need to take into account many factors:

• single or double-circuit - on the configuration of the heating system of the private house;
• power - calculate the size of the dwelling and its heat insulation;
• take into account the economic component;
• used fuel in the availability of a type of energy carrier, both the main and optional;
• the presence of chimney depending on the structural characteristics of the building.

And these are not all the nuances that define the model of the combined boiler. Turning to professional consultants, you can avoid extra spending, pick up the desired model and provide warmth and comfort in the house at any time of the year.

Outcome

Combined boilers can be a real salvation in the case when it is not possible to use a reliable and constant source of energy. In addition, such boilers will help save money if you use more expensive fuel type only as auxiliary option.