DIY inverter heating boiler. How to choose an induction boiler for heating a private house

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In the process of planning the installation of a heating system at the dacha or in country house many are trying to solve the problem of excessive energy costs by installing an induction heating boiler. In addition to saving energy, its design is such that it allows you to do without harmful emissions in environment and does not pose any danger during use. An important argument in its favor is the possibility of its independent design. In this article we will look at what an induction heating boiler is: everything about the operating principle + 2 do-it-yourself device options. In addition, its advantages over conventional electric boilers and gas units.

Construction of induction boilers

The basis internal structure such a boiler has an inductor (transformer) turned on. Conventional household induction boilers are slightly different from similar industrial ones with a cylindrical winding system. Compact boilers for domestic use use toroidal copper windings.

The outer casing of the unit is made of painted metal, then there is a thick layer of thermal and electrical insulation, inside of which there is a double-walled core. It is made of special ferromagnetic steel and has a wall thickness of at least 10 mm. The toroidal winding that is wound on the core is the primary winding. It is in it that the energy of the electric field is converted into a magnetic one, which creates eddy currents. Their energy is already transferred to the secondary winding. The role of the secondary winding is the body of the circuit, which, under the influence of this energy, releases a large number of heat transferred to the coolant. Toroidal winding allows you to create units with low weight and dimensions.

Operating principle of induction boilers

The standard package usually includes the boiler itself, an absolutely necessary semiconductor converter called an inverter, circuit breakers, electronic thermostat. The temperature sensor itself is located inside the boiler body.

The operation of induction boilers is based on the principle of electromagnetic induction. Its essence is that electricity consumed from the network creates an electromagnetic field. The coolant is supplied inside the boiler through the water pipe, which is welded at the bottom. Alternating current a frequency of 20 kHz is supplied to the boiler through an inverter. When this device is turned on, current flows through the toroidal winding of the boiler. In this case, the steel core heats up to a temperature of 750 degrees in just 7 minutes.

The heat produced is transferred to the coolant circulating inside the circuit. Rapid heating of the liquid creates convection currents. This means that the heated coolant expands greatly and rushes up the boiler structure and further into the heating system itself. Often this is enough for a domestic boiler with an average length heating circuit to operate fully. This method allows you to quickly heat the entire system, but for better circulation you need to additionally install a conventional circulation pump.

Thanks to the application of the principle of magnetic induction, heating of the coolant in such boilers occurs much faster than in units with heating elements, and heat losses are minimal. There is almost no scale on the core, no matter how hard and calcareous the water is.

This happens because the eddy currents force the core to vibrate, preventing scale from forming. At the same time, bubbles boiling near its body clean the surface of the core. Due to the tightness of the entire system, the coolant absorbs the maximum (98%) amount of released thermal energy. Thus, these parameters greatly increase the efficiency of the boiler, which has a positive effect on its efficiency and service life.

Pros and cons of induction boilers

Induction boilers have a number of undoubted advantages over conventional boilers using heating elements:

Stable efficiency indicators up to 99% for almost the entire service life.
There are no heating elements, which significantly extends the life of the device.
There are no moving elements, which completely eliminates mechanical wear and the need to replace components.
The absence of detachable internal connections does not allow for leakage.
Full availability of work even with direct current or low voltage in the network.
Very fast heating up desired temperature coolant (5 – 7 min).
Enough high degree electrical and fire safety, corresponding to class II due to the use of a core not directly connected to the inductor.
There is no need to install a chimney or provide a separate room for the boiler. To install this system there is no need to attract highly qualified specialists.
The standard service life of the device is up to 25 years or even more. It directly depends on the tightness of the sealed external seam and on the large thickness metal pipes for the core. It does not require any maintenance work during its entire service life.
The boiler can use all available coolant fluids: oil, water, antifreeze, ethylene glycol without any preliminary preparation.
The coolant can only be changed once every 10 years.
Good protection against overheating and various accidents, quiet operation.
The boilers are equipped with electronic automated systems management.
There is no scale inside the circuit.
Possibility of connecting the boiler to any closed heating systems.
The minimum possible heating of the coolant is 35°C.

But induction boilers have disadvantages, both compared to other heating devices and in terms of individual specific parameters.

Such boilers can only be connected to a closed heating circuit, very often with forced circulation of coolant
Quite a large weight of the boiler with quite small sizes. The weight of a 2.5 kW boiler is at least 23 kg with a total height of 45 cm and a diameter of 12 cm.
The price is higher than other boilers, which is due to the presence of an expensive part - an inverter.
Radio interference generated at a distance of several meters from the boiler in the long-wave, medium-wave and even VHF range. They have no effect on the human body, but they are well felt by pets and electronic equipment.

Installation of an induction boiler and its control system

Installation of such boilers is only possible in closed system heating. This requires an expansion tank and a pump for forced circulation of the coolant.

According to the instructions, the induction boiler is positioned strictly vertically. After this, the return pipe of the heating circuit is connected to the lower inlet pipe. The outlet is located at the top of the device (side or top). The supply pipeline is looped onto it.

The weight of the mounted boiler is quite serious, so special attention must be paid to the fastenings. They must be very reliable, taking into account the fact that when the boiler is operating, its weight will increase significantly due to the coolant entering inside. The lateral distance from the boiler to surrounding objects and walls is 300 mm. The distance to the floor and ceiling is 800 mm and no less. An important and mandatory condition for installing such boilers is their grounding. It is possible to use both metal and metal-plastic pipes with it.

A group of safety devices is built next to the outlet pipe: a blast valve, a pressure gauge, an air vent. The expansion tank is installed at a convenient location in the return pipe of the system. Shut-off valves are mainly installed after the safety group.

Installation of the entire control system, as well as the boiler itself, must be carried out in accordance with existing rules and PUE standards, diagrams and conditions contained in the technical passport included in the kit.

Examples of homemade designs

If you are not going to use an induction boiler for main heating in a private house, but want to equip a cottage or garage with it, then you can try to design it yourself. There are two options on how to do this.

First option

To implement it you will need pieces of plastic pipes and welding inverter. Having basic knowledge of physics and knowing how to use wire cutters, you can independently make a basic induction model. To do this, you need to purchase an already created high-frequency welding inverter with continuously adjustable current power up to 15 amperes or even higher. To heat a large area, it is better to choose a much more powerful device. You will also need wire rod from of stainless steel or ordinary pieces of steel wire. This is necessary to act as a heated element. Their length is about 50 mm, with a diameter of 7 mm.

An important component is copper wire, which can be easily purchased at any specialty store. Do not use windings from old coils. The housing, which is the basis of the induction coil, is also part of the pipeline, so it can be made from a plastic pipe with thick walls. Its internal diameter should be 50 mm. Two outlet pipes are attached to this housing for the flow of cold coolant and the release of hot coolant. The entire internal space of the case must be completely filled with pieces of wire and closed metal mesh so that they don't get enough sleep.

The induction coil is made in the following way: an enamel-coated one is gradually wound around a previously prepared plastic pipe copper wire. It will take approximately 90 turns. The result homemade device needs to be connected to pipeline network. Cut out of pipeline small area pipes, and instead a homemade induction boiler is installed. It is connected through an inverter and the water is simply turned on.

Second option

This option involves the use of a three-phase transformer with the possibility of fixation. In addition, you will also need welding machine. To make the device, you need to weld two pipes so that they look like a donut in cross-section. This design performs both conductive and heating functions. Then they wind the winding directly onto the boiler body in order to make it more efficient work, despite its low weight and size. Here it is used standard scheme heating the coolant: it receives a large amount of thermal energy upon contact with the winding.

The manufacturing scheme for this design is somewhat more complicated than in the first version. The boiler is equipped with two pipes, both for the entrance of the cold coolant and for the exit of the heated one. If you come up with and build a protective casing yourself, you can minimize heat losses.

Features of self-installation and operation of homemade boilers

As in the case of factory-made boilers, only a closed-type heating system can be suitable for installing a homemade induction installation. It should include centrifugal pump, which creates constant circulation of coolant inside the heating system. Common today plastic pipelines perfect for installing a homemade induction boiler. All regulations relating to the installation of shop boilers must be complied with fully and in this case. If you install controls and safety devices on the system, then your homemade installation will be little inferior to its factory counterparts.

Although it is quite difficult to make such a device, and it is better not to take on this task without having “direct hands”, it is a pleasure to operate it. After all, along with ease of use, we also get serious energy savings.

Any home should be warm, cozy and comfortable to live in. This can be achieved using many factors, including a properly organized heating system. When choosing from a variety of options for heating your home, you should choose the one that will provide maximum efficiency, safety and savings. Here we're talking about about, the implementation of which does not require a global restructuring of the existing heating system.

If you decide to build an induction boiler with your own hands, you first need to understand all the intricacies of this process.

How does an induction type boiler work?

The body of such equipment consists of several layers:

external;
thermal and electrical insulating layer;
2-wall core.

In boilers intended for industrial use, a cylindrical winding is used, while in domestic and home-made boilers, a copper wire winding is used according to the toroidal principle. It is carried out between ferromagnetic pipes having different diameters. Prerequisite: the pipe wall thickness must be more than 1 cm. Inner pipe acts as a magnetic circuit and is called a core.

The circuit of any electrical inductor consists of a primary winding (helps convert electricity into eddy current and magnetic fields), as well as the secondary winding.

It includes the boiler body itself and the main heating element, designed to obtain heat for the liquid carrier circulating through the heating system.

In addition to the main components, this type of boiler includes automatic switches and a heat sensor built into the housing.

The heating element is represented by an induction coil in which current (alternating or direct) is generated. The resulting vortex flows contribute to the heating of the steel core. After connecting the boiler to the network, the current accompanied high voltage, passes to the primary winding, resulting in an electromagnetic field. It is this that promotes the extrusion of currents into the steel core. Then all the heat goes directly to the heating devices.

The induction boiler design allows you to reduce the weight and size of the device, as well as obtain the highest possible efficiency. In this case, more than 95% of the heat goes into the coolant, which affects the performance of the device, as well as its efficiency. For example, heating the core to 75°C occurs in approximately 7 minutes.

Advantages of boilers

Induction boilers have a mass positive characteristics, which may ultimately influence the decision to purchase it or build a homemade structure:

Minimal likelihood of leakage due to the absence of detachable connections.
Protection against scale (explained by the influence of high-frequency vibrations from vortex flows).
Durability (due to the absence of elements that may be subject to wear).
Possibility of operating the boiler from the network with DC or low voltage.
Fastest heating possible.
Electrical and fire safety of the device (explained by the small temperature difference between the coolant and the core).
Possibility of saving energy due to low inertia.
Quietness (no need to install the boiler in a separate room of the house).

At the same time, the probability of failure is minimal, and the need preventative work almost zero.

Unique is the fact that the coolant circulating through the heating system should be changed only once every 10 years!

Disadvantages of a device with an induction principle of operation

There are no ideal devices, so before choosing the type of boiler you should consider some of its negative aspects:

powerful induction boilers are capable of provoking the occurrence of UVK waves operating within a radius of several meters from the boiler (their effect on humans is almost absent, but some pets can pick up such waves, which affects their well-being);
induction heating devices industrial production They are expensive, so not everyone can afford them.

Stages of creating an induction boiler with your own hands

According to experienced craftsmen, homemade production An induction heating device can be installed by anyone with at least a minimal understanding of heating circuits and systems. The event consists of the following stages:

Initially, for the base of the boiler you should purchase the necessary materials:

welding inverter with the ability to regulate current;
wire or rod rod about 7 mm thick, which must be crushed;
plastic pipe with walls at least 1 cm thick and about 5 cm in diameter.

The bottom should be covered with a metal mesh with cells of a minimum size and covered with fine wire to the very top. Upper part the pipes are covered with a grid, and then the entire structure is fixed using a welding machine.

This is followed by the stage of preparing the primary winding circuit. Why is enameled copper wire wound, maintaining a distance between the turns, onto a plastic pipe.

Creation protective casing, which involves attaching by welding a steel or iron body, which has thermal and electrical insulation, directly to the structure. The winding wire, brought outside the casing, helps connect the coil to the electrical network.

Then 2 pipes (inlet and outlet) are connected to the plastic pipe, helping to circulate the coolant throughout the device.

Installation features

Important! Induction devices are used exclusively in closed-type heating systems equipped with a pump.

Installation is carried out vertically.

Maximum safety when operating boilers of this type is ensured only by heating systems with plastic or polypropylene wiring.

It is advisable to maintain a distance between the boiler and nearby surfaces: from the wall - at least 30 cm, from the floor - more than 80 cm.

It is advisable to install a blast valve, which will help relieve air in the system in an emergency.

During the heating process, no harmful exhausts are released and there is no need to operate the chimney. Heating a residential building using an induction boiler is a modern, environmentally friendly and economical approach that has become widespread throughout the world.

Induction heating boilers appeared on the market not so long ago, but have already become a serious competitor to classic equipment using heating elements. Devices of these types have the same dimensions and do not differ in power consumption. However, inverter equipment has a number of advantages, for example, they warm up the heating system faster. Using your existing knowledge, you can create an induction heating boiler with your own hands.

Principle of operation

The basis of all induction-type devices is the ability of materials that conduct electric current to heat up under the influence of eddy currents, which are created using electromagnetic induction. The induction source is a high-frequency alternating electric current passing through the first winding of the heating device.

The secondary short-circuited winding is represented by a heating element located inside the coil. Eddy currents can also appear at a standard power supply frequency of 50 Hz. However, in such a situation, the heating device will not be able to function at maximum efficiency, and vibration and noise will be observed during its operation. Thus, the frequency must be raised to at least 10 kHz.

Part 2. Do-it-yourself induction boiler - it's easy. Choosing an induction cooker. Finalization.

Unit design

The inverter heating boiler consists of a heat exchanger that acts as a core on which a toroidal winding is wound, connected to a frequency converter. When electric current flows through the winding, an alternating magnetic field appears, causing the appearance of eddy currents in the heat exchanger.

Necessary for work heating unit the frequency is set using signals from the control unit arriving at a frequency converter. All industrial boilers of this type are equipped modern systems automation, allowing to provide optimal temperature coolant, and also turn off the unit in case of emergency situations.

The coolant passes through the heat exchanger and is heated by eddy currents. Since the temperature of the liquid at the inlet and outlet is different, continuous circulation of water in the heating circuit is possible even without the use of pumping equipment. Oil, antifreeze, antifreeze and water can be used as a carrier.

Particular attention should be paid to the fact that the quality of the liquid does not matter– the system is in a state of constant vibration, not felt by humans, and this prevents the formation of scale on the pipes. The outer shell of the boiler is metal structure, equipped with thermal and electrical insulation systems. Below is a do-it-yourself induction heating scheme that can be implemented quite easily.

Among the advantages of induction-type heating devices, it is worth noting the following:

However, the inverter unit also has several disadvantages. The most significant among them is cost. This is why many home craftsmen decide to make an induction boiler with their own hands. You can develop drawings of this device yourself, or you can use ready-made ones. Wherein homemade design will be practically not inferior to industrial models in terms of operating efficiency.

Part 4. Do-it-yourself induction boiler - it's easy. Testing in a water heating system.

There are several design options for units of this type. However, not all DIY induction heating boilers are easy to make. There are two designs worth paying attention to.

From inverter welding machine

When creating induction boilers with your own hands, the most difficult thing is to assemble a high-frequency converter. To simplify the task, you can use a welding inverter that produces a signal with a frequency of at least 20 kHz. You will also need the following materials for this work::

Copper conductor with an enamel insulating layer with a diameter of 1-1.5 mm.
Insulated wire and terminals for connecting the coil to the inverter.
Pieces of stainless steel wire about 5 cm long and 3-5 mm in diameter.
Water supply polyethylene pipe 100 cm long and 50 mm in diameter.
Fine mesh stainless steel mesh.
Pipe adapters.
Tee for connecting a safety valve.
Two ball valves.
Textolite strips and epoxy glue.

A plastic or metal distribution cabinet can be used as a housing. First, on a polypropylene pipe, departing 80-100 mm from its ends, it is necessary to strengthen 4 textolite strips 8-10 mm wide. Then 50 to 100 turns of wire coated with an enamel protective layer are wound on them. The distance between the turns should be 0.3-0.6 mm.

The exact number of turns is influenced by the diameter of the conductor, its resistivity index and the output parameters of the inverter used. If the unit will be installed in a residential area, it is better to make a toroidal winding to reduce the strength of the external electromagnetic field.

DIY induction boiler part 1

You need to insert a stainless steel mesh into one end of the pipe, and then tightly stuff it with pieces of stainless steel wire. After this, the second end of the pipe must also be covered with a mesh. Adapters are mounted on both sides polyethylene pipe, after which they are installed Ball Valves. The safety valve must be installed on the side of the top outlet adapter.

You will also have to coat the winding with epoxy. To make the composition, you need to take a little more hardener than recommended in the instructions - about 10-15%. After this, all that remains is to connect the winding to the inverter and install the heat exchanger in the housing. It is important to remember that induction heating units cannot be started without coolant. Before testing the system for functionality, it must be filled with water.

From induction cooker

There are two possible design options here. To implement the first solution, you will have to disassemble the plate and use its copper core heating element for making a coil. The tile control unit can be used to power the winding. However, this method has several significant disadvantages:

It is necessary to recalculate the inductance of the homemade coil.
Many stove models are equipped with an automatic shut-off system after a certain period of time from the moment of operation.
Induction cookers most often have a power of no more than 2.5 kW, which makes them suitable only for the manufacture of a low-power heating unit.

Which heating boiler is better? An induction electric boiler of 2 kW versus a heating element of 2 kW.

A simpler and more efficient design does not require preliminary disassembly of the slab. It is enough to install a sealed tank made of stainless steel on this device. This container will act as a boiler for the heating system. To get started homemade unit All that remains is to connect the tank to the heating system.

If House master has good knowledge in the field of electronics, then after finalizing the stove circuit you can make a good induction boiler. However, most craftsmen choose more simple ways solving the problem. Whatever design is used as a result, it will save on the purchase of factory equipment.

People are spoiled by civilization and cannot imagine existing without its benefits. These undoubtedly include heating of buildings. Heating systems are constantly being improved and are becoming more efficient and convenient to use.

But this is not enough. Agree, it’s not bad at all if heating equipment is also economical. And this desire is quite feasible - you can make an induction heating boiler with your own hands. It is capable of not only providing required level heating the room, but also very economically using energy resources.

Moreover, even a novice master can assemble such equipment if desired. How to do this correctly and what materials will be needed for manufacturing - we will examine these issues in detail in our article. Let us first consider the design and operating principle of the equipment, as well as the advantages of its use.

Before you get started self-assembly induction boiler, you have to understand its structure and operating principle. And only after understanding these points can you start making homemade products.

How does an induction boiler work?

To understand how induction equipment works, you need to become familiar with the principle of its operation. So let’s remember the school physics course.

When a conductive material is passed through electricity, it generates heat. In this case, the amount of heat received will be directly proportional to the voltage and current. This pattern was discovered by Joule and Lenz, after whom the physical law is named.

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However, induction boilers, although they run on electricity, are quite economical.

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A copper wire is carefully wound onto a plastic pipe with pieces of metal wire inside.

Only after this can you test the new device. There must be liquid in it.

If you turn on the induction boiler “dry”, plastic case will melt from high temperature. This will lead to partial destruction of the heating system, which is unacceptable.

Another important point – competent arrangement grounding heating device, without which its safe operation is impossible.

Features of Vortex Induction Boiler

We are already familiar with the operating principle of an induction heating device. There is a variation of it: a vortex induction boiler or VIN, which operates somewhat differently.

Distinctive features of VIN

Like its induction counterpart, it operates on high-frequency voltage, so it must be equipped with an inverter. The peculiarity of the VIN device is that it does not have a secondary winding.

Everyone plays her role metal parts device. They are necessarily made from materials that exhibit ferromagnetic properties. Thus, when current is applied to the primary winding of the device, the electromagnetic field strength increases sharply.

It, in turn, generates a current, the strength of which rapidly increases. Eddy currents provoke magnetization reversal, as a result of which all ferromagnetic surfaces heat up very quickly, almost instantly.

Vortex devices are quite compact, but due to the use of metal, their weight is high. This has the added advantage that all massive elements of the housing take part in the heat exchange. Thus, the efficiency of the unit approaches 100%.

This feature of the device must be taken into account if you decide to make a VIN boiler yourself. It can only be made of metal, plastic should not be used.

Unusual model of induction device

This modification of the induction boiler may seem very unusual, however, it has a right to exist.

Moreover, practice shows that such a device is much more economical than a standard heating element boiler. Heating a standard three-ruble note will take about 1.8-2.5 kW per hour, while an electric boiler will spend at least 6 kW.

When making homemade induction boilers, only special winding copper wire is used for winding on the core.

Actually, the boiler is embedded in heating system heat exchanger, which is heated by an induction stove.

An important link in the design is the heat exchanger; it must be compact, reliable and as cheap as possible. Calculations show that to heat an apartment of about 50 square meters. m, a device operating with 40 liters of coolant will be sufficient.

That is, you will need a flat metal tank, the dimensions of which vary between 50x600x500 mm. It is quite possible to make such a container yourself by welding it from profile pipes 50x50.

The work is performed in the following sequence:

The 50x50 pipe is cut into pieces 600 mm long. There should be 9-10 pieces in total.
The resulting sections are welded one to another according to the “wall to wall” principle so that a continuous row of pipes is obtained.
Two more sections are cut from the pipe so that their length is equal to the width of the resulting workpiece.
One wall is cut off from both resulting pipe fragments.
The part is installed with the cut part on the pipes welded together so that a blank resembling a manifold is obtained. The fragment is welded to the heat exchanger.
The second section of pipe is installed in the same way on the opposite side.
Nozzles are welded into diagonally opposite sections of the heat exchanger for connection to the heating system.
The structure is carefully scalded, as it must be completely sealed.

The heat exchanger is ready, it can be installed in place and a heat source can be supplied under it. Practice shows that it is best to install such a system in a bathroom using vertical installation.

The heat exchanger is welded into the heating system, and the tile is located between it and the wall.

Home craftsmen claim that if you connect an inverter to such a device, its energy consumption will be significantly reduced.

After reading the instructions, does making homemade boilers seem difficult and dangerous to you? Do you doubt that a homemade product will be more economical in using electricity to heat the coolant in the heating system? In this case, purchasing a ready-made heating unit will be the best solution.

On our website there is useful materials on choosing the best electric boiler and rating the most popular models among buyers. We also recommend that you familiarize yourself with the features of calculating energy consumption by the boiler and other options electric heating in the house:

To buy such a device in a store you will have to spend a significant amount, so home craftsmen have learned to make them themselves.

Do you use a homemade induction boiler as a heating device? Share a photo of your homemade product and assembly instructions in the comments section.

Or maybe you are just about to start making a boiler and you still have unresolved questions after reading our article? Don't hesitate to ask them - we will try to help you.

Fundamentally, an induction boiler is an inductor (transformer) with two types of winding. The resulting eddy currents follow a short-circuited loop, which is the boiler body. The secondary winding receives energy, which is converted into heat, heating the coolant.

Induction boilers for heating a private home have the following advantages:

provide double heating of the coolant;
quickly heat the house;
they use AC and DC power for operation;
don't require special room for installation;
can operate at low voltage;
do not contain parts that fail;
coolant leakage is impossible;
do not form scale;
fireproof;
Efficiency is about 100%, does not depend on the service life;
allow you to select the coolant (water, antifreeze, oil);
have a manufacturer's warranty of up to 25 years;
installed by the homeowner without the involvement of specialists.

Which induction boiler is better to choose?

Manufacturers offer two types of induction boilers - single-phase and three-phase. Many boiler models are available with control panels. The choice of an induction boiler is made based on a power of 60 watts per 1 sq. m of heated area. If the house is not intended for permanent residence, then the indicated power rate can be reduced to 50 watts. With a house area of 120 sq.m. in this case, an induction boiler with a power of 60 kW should be installed.

According to consumer reviews, the main disadvantage of induction boilers is their high price - such boilers are much more expensive than heating elements. But in this case, the high cost of such equipment is justified: induction boilers last longer than heating elements, which form scale and sharply lose heat transfer.

Comparative calculations of the operating efficiency of heating elements and induction boilers indicate that the difference in cost pays off in the first year of operation of the induction boiler. Moreover, the colder the heating season, the faster such a boiler will pay for itself.

The efficiency of an induction boiler and its energy consumption allow it to be considered energy-saving equipment. Along with the advantages of induction boilers, consumers note the need to insulate their homes - only in this case can they count on high efficiency of the equipment.

In the photo, my choice is an induction boiler EPO Evan 9.45 kW

How much does induction heating of a private house cost?

Let's calculate the monthly costs of heating a house with an area of 200 sq.m. using an induction boiler. To heat such an area, you will need to purchase a boiler with a capacity of: 200 x 60 = 12 kW.

Heating costs per month will be:

C = M x H x D x T, where:

M - boiler power;
B - operating time per day (10 hours) in cyclic mode;
D - number of days in a month (30);
T is the tariff cost of electricity, depending on the region (let’s assume roughly 3 rubles/kWh).

Substituting the values, we get costs - 10,800 rubles per month.

The efficiency of induction boilers does not change during the entire service life, i.e. Heating costs will remain constant throughout the life of the boiler. According to reviews from homeowners who use heating element boilers to heat their homes, after the first year of operation, operating efficiency due to scale formation drops by 10%, and subsequently it decreases even more.

How to make induction heating for a private house with your own hands

You can make an induction boiler yourself. Let's consider two options for manufacturing such a unit.

Induction boiler made from a welding inverter and plastic pipes

To make a boiler you will need:

high-frequency welding inverter with continuously adjustable current with a power of 15 amperes;
stainless steel wire rod or pieces of steel wire with a length of 50 and a diameter of 7 mm for the heating element;
thick-walled plastic pipe, internal diameter slightly less than 50 mm;
copper wire for winding.

The cold coolant inlet and heated coolant outlet pipes are attached to the pipe body. Inner space filled with pieces of wire and closed on both sides with a metal mesh. The induction coil must be made by winding enameled copper wire (about 90 turns) around a plastic pipe. A homemade induction device is connected to the network in place of the cut section of the pipe.

Induction boiler from a welding machine

To make a boiler you will need:

welding machine;
three-phase transformer.

For more information about the production and connection of an induction boiler, see the video at the end of the page.

Manufactured devices must be installed on safe distance from walls and other devices (at least 30 cm), from the floor and ceiling (at least 80 cm);
Security group (air safety valve, pressure gauge) is best placed at the outlet pipe;
The induction boiler must be grounded.

conclusions

Induction boilers are more economical and reliable than electric boilers of other designs.
Their main drawback - high cost - can be avoided by making the unit yourself. According to the experience of the craftsmen, the boiler in this case will cost several times less. A properly manufactured induction boiler is not inferior in reliability to an industrial one.
It is important to install an induction boiler correctly, ensuring all safety measures. Reliability and efficiency of induction boilers are crucial when choosing.

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