Solid fuel boilers, despite all the obvious advantages and disadvantages, have another hidden aspect that you have to pay attention to over time. Systems with manual boot mode do not work in maintenance mode. The fuel in the furnace has run out - the boiler stops working, respectively, the coolant begins to cool. This problem is well known to residents of the private sector and owners of country houses.
Constantly throwing up coal or firewood, filling the firebox, is not always possible, and stopping the boiler in winter is fraught with a sharp drop in temperature in all residential premises.
The best option to prevent such a situation would be a heating system in which an electric boiler is tied to a solid fuel boiler.
Functions of an electric boiler in a heating system with a solid fuel unit
Connecting an electric boiler to the system in conjunction with a solid fuel heater is a fairly common engineering solution. This option eliminates the possibility of cooling the heating system, prevents hypothermia of the main heating unit and maintains a comfortable temperature in the house. An electric boiler often acts as a backup heating device, the task of which is to equalize the temperature of the coolant in the heating system.
The layout of solid fuel and electric boilers when used together in the heating system
The operation of solid fuel boilers needs periodic human control - all models of such units need to be loaded with fuel.
On a note: for traditional boilers, the number of downloads can reach up to 2-6 times per day. The situation is different with pyrolysis boilers and long-burning units. Here, frequent human intervention is not required. One load of fuel is enough for 12-24 hours of boiler operation, and for some models - for 48 hours of operation.
The main task for the owner of the house with the heating turned on is to prevent the boiler and heating system from cooling down. An electric boiler paired with a solid fuel boiler successfully solve this problem. Let us consider in detail the combination of a solid fuel boiler with a heating device powered by electricity.
The working one is as follows: a solid fuel unit with a power of 50 kW must be combined with an electric boiler with a power of 28 kW. The operation of the electric heater is periodic. The unit must be on the pickup - be ready to turn on immediately after the main equipment stops. The electric boiler starts when the fuel in the solid fuel boiler runs out and the temperature of the coolant in the system drops to 50 0 C. In this case, there must be a water tank for the hot water supply system in the circuit, which in this case acts as a heat accumulator.
The main elements of the circuit that consume the power of autonomous heating boilers are:
- heating radiators - require 30 kW;
- heating system "warm floor" - up to 15 kW;
- storage capacity for the DHW system - an average of 300 liters.
Attention! Automation for adjusting the switching of circuits in this situation - a bunch of units is not required.
An electric boiler, working together with a heat accumulator, is a group that prevents a coolant with a temperature that has fallen below a critical level of 50 0 C from entering the main heating unit.
The pump installed in the system periodically drives the coolant through the pipeline, signaling the temperature in the heating circuit. When the temperature of the coolant drops to a critical level, the electric boiler equipped with heating elements is put into operation, taking on the task of supplying heat to the house. A thermostat and a three-way valve provide temperature control of the hot water tank. When the water temperature in the DHW system circuit drops, the coolant is launched into the coil to heat hot water. A properly connected electric boiler, competent piping with a solid fuel boiler, will make your system completely controllable.
In the described design of the heating system, all heating equipment, including the pipeline, is reliably protected from defrosting when the main heating device is stopped and does not cause interruptions in residential heating and hot water supply.
Combined heating boilers
Another, less expensive option is the installation of a combined unit, which is a solid fuel boiler and an electric unit at the same time.
Such devices use solid fuel and electricity to heat the coolant, being designed for the interchangeability of these energy carriers during operation. A feature of such units is the installation of electric heating elements in the tank of a solid fuel boiler - heating elements provide the necessary heating of the coolant passing through the heat exchanger. The idea of combining an electrical device with a solid fuel unit is not new, but it became possible to launch the production of the corresponding heating equipment only after the appearance of combined automation devices and new generation materials.
The principle of operation of combined heating mechanisms is that, while the combustion chamber is free from the main type of fuel (wood, coal, peat, etc.), the main work on heating the coolant is for. Thanks to the installed control sensors, the equipment independently reacts to changes in temperature, turning on and off as needed.
In practice, it looks like this: the fuel filling has already completely burned out, respectively, the boiler went out. The boiler water accordingly begins to lose its temperature. Solid fuel is being replaced by electric heating. Now the heating mechanism works like a regular electric boiler until the firebox is filled with the next batch of firewood or coal.
After the main unit reaches the optimal operating mode, the control unit turns off the electric heating elements, the heating again works on solid fuel.
Advantages and disadvantages of combined heating equipment
Despite the high cost, combined boilers have undeniable advantages. These include not only complete control over the state of the entire home heating system, but also a number of others:
- the device does an excellent job of heating rooms with low energy consumption;
- combined boilers are environmentally friendly heating units;
- lack of condensate, since the first heating of the device is carried out in both modes - main and auxiliary;
- the entire heating complex is constantly in working condition, which is important in the event of a long absence of the owners of the house.
However, this technique also has disadvantages.
A significant disadvantage for combined heaters is energy dependence. In the absence of voltage in the network, the system loses its efficiency and versatility.
Important! When installing equipment, it is necessary to take into account the potential of home electrical wiring, which may not be designed for the power of the equipment being installed. The presence of low-amperage circuit breakers will lead to constant power outages in the house. Before installation, make sure that the power consumption limit allocated for you is able to satisfy the operation of the heating equipment.
Unlike traditional solid fuel appliances, in which the efficiency reaches 70-80%, combined products have a lower coefficient - by about 3-5%.
How to achieve joint operation of electric and solid fuel units
If you are faced with a choice of which individual heating option to prefer - a solid fuel boiler, an autonomous electrical unit or a combination of these two devices, the latter option has advantages. To install the circuit, you will need a connection diagram for both units, similar to a gas-solid fuel heating complex. Properly done piping of equipment is a guarantee of the efficiency and safety of operation of this equipment.
The proposed video describes in detail how and in what way to connect heating devices on a solid together with electric heating elements
What to pay attention to when installing:
- both devices must have a reasonable power ratio, a coal-fired or wood-burning heater is the main source of heat, so its power must be twice the power of an electric boiler;
- both units are connected in parallel, which gives the independence of the operation of one from the other;
- the solid fuel unit is the main one and is connected to a large circuit, while the electric boiler is responsible for the temperature in a small one;
- the main heating unit is equipped with a three-way valve;
- to save energy and ensure the safety of heating, the installation of a heat accumulator is required;
- each heater is set to a certain heating temperature - for solid fuel equipment, the operating temperature should be 60-70 0 C, while on the electric unit the temperature is set to 40-50 0 C, since due to the presence it will cool down more slowly, and the electric boiler will start with a delay in time.
Eventually
In each case, the homeowner himself decides how to organize an autonomous heating system. The proposed technical solutions will not only eliminate the unpleasant consequences of the attenuation of the main heater during a severe winter, but will also provide some energy savings.
The efficiency of operation of solid fuel units and electric boilers in pairs has been proven by practice - the interaction of these devices gives greater comfort and guarantees the reliability of heat supply.
Autonomous heating is becoming more and more popular among private property owners. The ability to heat a house and even an apartment at any convenient time, and not with the start of the heating season, provides huge advantages. And if in apartments the choice of energy is limited (electricity or gas), then in a private house you can install both a solid fuel and a combined boiler (wood-electricity).
Combined boiler in the most successful way combines the uninterrupted equipment and its versatility. Depending on the availability of a particular type of fuel, you can select the appropriate mode, each of which will be equally effective.
The design of the unit is quite practical, which leads to a reduction in heat loss and economical fuel consumption. During the day, it is advisable to heat the house with coal and/or wood, and at night to maintain the temperature with electricity. At the same time, there is no need to monitor the availability of firewood in the furnace, and the nightly electricity tariff is 15-35% lower than the daytime one.
Video 1 Combined boiler device in a private house
Design features
The main difference between combined equipment and solid fuel equipment is the presence of a thermoelectric heater in the heat exchanger tank. The heating element turns on automatically at the moment when the power of the combusted fuel is not enough to ensure the optimum temperature of the coolant. In other words, the heating element starts up when firewood or coal burns out, the heat subsides and there is a need to heat the coolant. All processes are fully automated and do not require human intervention, with the exception, perhaps, of laying firewood in the firebox.
In order to quickly and efficiently heat up the premises, different boilers have from 1 to 4 combustion chambers, each of which is connected to a separate thermoelectric heater.
The boiler for heating a private house combined wood / electricity has only 1 combustion chamber and 1 thermoelectric heater, and the water is heated by analogy with a storage water heater (boiler).
Video 2 Single-circuit boiler on wood and electricity
Why buy
- A wide range of fuels used - it can be not only coal or firewood, but also briquettes, pellets, wood waste, etc.;
- Autonomous operation - the combined boiler in the "electricity" mode works for an unlimited amount of time without human intervention. The restriction in heating can only be due to the lack of electricity. The operation of the equipment is absolutely safe;
- Convenient maintenance - if necessary, the boiler can be converted into mono-fuel. When using a predominantly electric mode, cleaning of the boiler and chimney is not required; with regular use of solid fuel, it is necessary to clean the boiler as often as a standard solid fuel boiler - once a week the furnace and 1 time in 3-5 months the chimney.
Price is hard to include as an advantage. Compared to mono-fuel boilers, combined boilers are much more expensive, depending on the brand and the number of combustion chambers.
How to choose
Heating equipment can be used both for heating the residential sector, and industrial and industrial premises. To select the appropriate model that will be suitable for power and efficiency, you should focus on the number of circuits, performance and performance.
When purchasing a combined electricity / firewood boiler for heating a private house, consider the following indicators:
- equipment - as a cheaper alternative, some manufacturers offer a boiler where the coolant heats only the heating element. This design is irrational, since the voltage in the network is not always stable, and electricity is sometimes turned off;
- dimensions of the equipment - in the presence of several combustion chambers, which, as a rule, are made of cast iron alloy, the weight of the equipment can reach 500 or more kilograms, which will require a special base and a separate room. Also pay attention to the size of the firebox, since the frequency of laying firewood depends on this parameter.
Cast iron retains heat much longer than ceramics and is suitable for all types of solid fuels.
- power is a parameter that directly depends on the type of fuel - electricity or firewood. Taking into account which type of fuel will be a priority, you should focus on the power of the boiler.
In order for heating to be efficient, the boiler output must always exceed the actual need for it.
- the presence of a water heating circuit, which provides hot water at the points of water intake.
Installation Features
Combined equipment will require a separate room. Here it is necessary to provide the following mandatory installation elements:
- foundation - a low reinforced concrete layer that compensates for the dimensions of the boiler;
- arrangement of the chimney - the principle is in many respects similar to the chimney on a solid fuel boiler, where high-quality draft is provided
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Photo 4 Plan-scheme of the heating system for a combined boiler
The traction power depends on the height of the pipe head. Its optimal height above the ridge is from 50 cm.
Once the boiler has been installed, the chimney must be carefully insulated. This will avoid the appearance of condensate and ice in the pipe, which prevents smoke from escaping.
- a ventilation system that will allow timely removal of combustion products and carbon monoxide when it appears.
- connection to the mains - a heating element that maintains and heats the coolant to a certain temperature, operates exclusively from the mains 220 volts.
To connect the equipment, a 380 volt line and 3 phases is required. In this case, it is necessary to ensure the correct connection of the input and grounding to the circuit. You should not take risks and make grounding to zero a simple break in the circuit, the automation simply will not have time to do the skew.
The popularity of combo boilers wood / electricity is due to the fact that both types of energy are the most accessible to the population. At the same time, all processes in the heating equipment are fully automated, and heat losses are minimized. The overpayment in price is compensated during the first 2-3 years of operation.
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BUT independent heating is preferable from the point of view of saving resources and ease of use. Owners of houses equipped with boilers can independently decide when to start and end the heating season. The type of heater is selected depending on the type of energy to be used. Universal boilers for heating on wood and electricity allow you to use exactly the type of energy carrier that is available at any given time, as well as make it possible to fine-tune the boiler.
Combined boiler
Solid fuel boilers with electric heating elements
Solid fuels are as popular as gas and electricity. In case of any cataclysms and accidents, such boilers can work and heat the home, and with the correct calculation of the heating system and high-quality installation, solid fuel boilers turn out to be the most economical. The use of heating elements allows you to maintain the temperature of the water in the system at a comfortable level, even if the combustion process in the boiler is completed. Heating elements in all types of boilers are installed under the grate in the immediate vicinity of the combustion site.
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Wood burning boilers
To use firewood as fuel, the boiler must have characteristic features - front loading and a chamber depth of about 50 cm. The grate for such boilers is made of cast iron, at the bottom there is a blower and an ash chamber. The adjustment of such a boiler occurs in manual or semi-automatic mode and is carried out as follows:
- a temperature sensor is installed in the heat exchanger inside the boiler, which registers the temperature of the water in the system;
- temperature data is transmitted to a thermometer located on the boiler body;
- in automatic mode or by manual adjustment, increase or decrease the air supply to the combustion chamber.
Boilers used for all types of solid fuels
There are models of boilers that involve the use of not only firewood, but also other types of fuel - coal, pellets, peat. In this case, additional elements for loading and supplying fuel are added to the usual design. When burning firewood, it gives out a much lower temperature than coal, so universal boilers have thicker walls.
When choosing a boiler, preference should be given to those models in which there is the largest number of internal pipes; the efficiency of such boilers is always higher. An important parameter is that the inlet diameter of the return pipe must be greater than or equal to the outlet pipe, this configuration also increases the circulation efficiency.
Smoke extraction
The removal of combustion products from a solid fuel boiler with electric heating elements must be carried out according to general rules using a metal chimney pipe. The traction efficiency is not affected by which outlet is present on the boiler - rear or top. More expensive models have a special device that equalizes the rate of gas removal. It is a set of special dampers that the smoke goes around when moving up, while the heat remains inside the boiler and its efficiency increases.
Boilers for individual heating on wood and electricity are selected taking into account the following factors:
- the type of fuel that is available;
- data of heat engineering calculation performed individually for a specific object;
- engineering features of the heating system as a whole.
It is possible to draw conclusions about the power of the boiler only if the data listed above are available, since average recommendations do not always fit the operating conditions at a particular facility. Solid fuel household boilers with the ability to connect to electricity have a wide power range - from 6 kW to 100 kW, their cost varies from one and a half dozen to several hundred thousand rubles.
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Solid fuel boilers can only be used if there is a constant circulation, that is, either the heating system is built on the principle of natural circulation, or the circulation pumps are connected to an uninterruptible power supply. This is necessary because the burning of firewood cannot be stopped automatically and instantly, and when the pumps stop, the water will boil while burning continues, and the heating system will be seriously damaged.
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.
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.
Rice. one Internal constructioncombined 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.
Rice. 2Secondly, 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.
Rice. 3What 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 wood 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. fourIf 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.
