At the planning stage of building a private house and in the process of creating a project, all communications are calculated, which includes the heating system. Recently, most often, an electric boiler has been used as a heat source to supply radiators and underfloor heating systems for heating a private house of 150 m², since it has a number of advantages over similar products of this type. To choose the right device correctly, you need to look at the technical characteristics of the boiler, its power, applicability over an area of 150 m², as well as the location options and connection diagram of the device. We asked specialists from the Miralex store, which offers a wide range of heating boilers, to tell us how to understand the characteristics of boilers.
A correctly selected electric boiler will not necessarily be the largest and most powerful Source pobudova.in.ua
When designing, it is important to take into account all the factors that influence the circulation of air masses in the room - the number of storeys of the building, the level of its thermal insulation and the overall square footage. A correctly selected boiler is 70% of the entire system, since its main task will be to prepare and heat the coolant for consuming radiators.
Types of boilers for a private home
If we consider a private house with a square area of 150 m², then the most suitable boilers for individual heating will be the following types:
Electrical
This is a device powered by electric current, which heats the internal environment from the contact of a liquid with a hot heating element. In turn, electric boilers, depending on the principle of their operation, are divided into several types:
- A product in which water is heated using direct contact electric heating elements. These parts are located inside the container into which the liquid flows; when current is supplied to the terminals, the heating element is heated and heat is transferred to the internal environment. This is the simplest boiler device, but also one of the most reliable.
Diagram of an electric boiler with heating elements Source www.bau.ua
- The electrode boiler has a productivity of up to 95% and therefore can be used in cases where it is necessary to heat a large area in a short time. Heating of the liquid in such a system occurs from the effect of current on the salt contained in the coolant, which requires the use of a mixture with a high mineral content.
Electrode heating system Source dom-steny.ru
- Induction boiler. It appeared on the market relatively recently, but is already very popular, as it has the highest positive effect coefficient, which is 96-99%. The principle of operation of the boiler is to transfer heat to the carrier by electromagnetic induction. The field passes through the metal shell of the flask and heats the inner rod, which is in contact with the coolant and transfers the temperature to it.
For induction heating, from one to several boilers are used Source teplopoint.ru
See also: Catalog of companies that specialize in insulating houses.
Gas
Heating of liquid in a gas boiler is carried out by burning a flame inside a closed chamber and direct contact of the heat exchanger with high temperature. Liquid flows continuously inside such a coil, which is supplied by a pump and flows further through the pipeline to the radiators.
To install a heating system with a gas boiler, you will need many permits and the creation of a special gas pipeline project, and if the device is connected to an autonomous gas source, you will have to periodically change the storage tank and refuel.
Floor-standing gas boiler Source tizol.com
All of the above boilers have their advantages and disadvantages, which must be taken into account when designing and installing equipment.
Boilers can also be classified according to their installation scheme, which can be floor-mounted or wall-mounted. As a rule, devices with high power have a large heat exchanger, so the total weight of the product will not be small. It is very problematic to place such a boiler on the wall, so they are produced with a recommendation for a floor location on a permanent foundation.
Wall-mounted equipment does not have a large mass, since there is no storage device in its design; instead, there is a heat exchanger heated by a continuous supply of high temperature.
Electric boiler efficiency
For some reason, the store manager doesn’t tell you that the efficiency of an electric boiler is different from 100 percent. But that’s how it is.
Why? Because this is real life, not an advertising brochure.
In reality, with 20 kW*hours of electrical energy spent, you get approximately 18.5-19 kW of thermal energy per hour for heating your home.
As you can see, the efficiency of a classic heating element electric boiler is 92-95 percent.
If you want to improve this indicator, you can try installing an electrode boiler, for example, Galan.
Why did I mention Galan here? Yes, because he is the most famous. Although now several companies produce this kind of boilers.
You will gain another 2-3 percent in efficiency due to the fact that electrode boilers do not have heating elements and the entire volume of coolant in the flask is heated in them at once.
But if I were you, instead of this “dancing with a tambourine,” I would invest additional money in insulating the house. This way the effect will be much more noticeable.
What is better for a building of 150 m²
It is impossible to unambiguously determine which boiler is better for a private house of 150 sq. m., since for the correct choice it is necessary to take into account all factors, from the general square footage and length of the lines, to the level of thermal insulation and the thickness of the walls of the building.
When taking into account the thickness of the walls, the properties of the material from which they are built are also taken into account. Source hyser.com.ua
To place a gas boiler, you will need to build a chimney and fresh ventilation, when such structures are not needed for an electrical appliance. Based on this indicator, a boiler with heating elements is much easier to install in any room; moreover, gas equipment can only be used if there is a gas supply line, which is not always available.
A gas boiler has one big advantage: the speed of heating the liquid and the cost of resource costs. One cubic meter of gas costs much less than the amount of kilowatts of electricity that would be required to heat the same volume of coolant. But there are cases when heating is carried out in a house in which an exhaust hood is not structurally provided or it does not meet safety requirements, so the best option here would be to use an electric boiler.
Also, the main advantage of an electric device is the absence of a combustion chamber and open flame. Its only drawback is the low cost of electricity.
In the absence of light, the boiler will not be able to heat the house Source pinterest.ph
If the choice nevertheless fell on a gas boiler, then you must also choose it carefully. Which gas boiler is best for a private house of 150 sq. m.? When answering this question, it is also necessary to take into account the total area of the room, the region in which the building is located, as well as the capacity of the heating system. Gas boilers come in different capacities, which is expressed in the size of the combustion chamber and the size of the heat exchanger; the higher the efficiency of the device, the larger the coil will be.
The optimal choice of heating equipment - the nuances and subtleties of the issue
Having found out for yourself the necessary power parameters of the solid fuel boiler that will be in your home, you can begin to design and install the heating system. You should be aware that the declared data on the thermal load life of the equipment affects the cost of the unit. Low-power heating devices have limited technological capabilities and are designed mainly for heating small rooms. These can be country houses, saunas and country-type guest buildings.
If necessary, the question arises of how to increase the functionality and efficiency of a solid fuel device. In this case, there are reasonable technical and engineering solutions with which increasing the boiler’s performance will have a tangible effect.
Note: the efficiency of the device can be significantly increased by installing an additional heat exchanger in the chimney, which will receive heat from volatile combustion waste escaping into the atmosphere. An economizer (additional heat exchanger) will give an increase of 20-30% to the rated power of the boiler equipment.
It is not advisable to use high-power solid fuel boilers for autonomous heating of residential buildings. Such equipment is cumbersome and requires a special large area for installation. Considering the size and enormous power of industrial boiler equipment, one should remember the significant consumption of fuel resources.
This technique is ideal for heating on an industrial scale. A lot of heat will be required when heating large industrial facilities and structures. Solid fuel units with a large thermal load are installed at enterprises.
Boiler power for heating a private house
An important role when choosing an electric heating device is played by the power of the boiler for a house of 150 sq. m, which on average ranges from 11 to 16 kW. With such indicators, the coolant is heated in a short period of time, and with sufficient circulation, the liquid will quickly spread throughout all radiators and other heating devices.
To correctly calculate the required boiler power, you must use the following formula:
W = (S * W specific )/10
Where W of the boiler is the estimated power of the device used,
S is the exact area of the heated room,
Specific is an indicator of power per ten square meters. This standard does not change and depends on the location of the building and in what climatic zone it is located. The colder the region, the higher the rate will be.
A house in the north of the country needs more powerful boilers Source pinterest.ph
Using this formula, you can accurately calculate the average power of a heating device. An electric boiler for heating a private house of 120 sq. m. can also be calculated using the above diagram; it will differ only in the quadrature of the room.
Pros and cons of electric boilers
The main advantage of an electric boiler is its low cost and ease of installation and operation. The device is supplied with simple elements and components, which can be quickly replaced in case of breakdown.
If you plan to use an induction boiler, then its cost will be slightly higher than similar products, but during operation it is much more profitable, since it has no side effects in the form of scale and burnt out contacts on heating elements.
Also a positive factor is the complete autonomy of the system, which depends only on a continuous supply of voltage.
Prices: summary table
| Model | Type | Cost, rub. |
| EVAN EPO 18 | heating elementnew | 13 500-17 000 |
| RECO 18P | heating elementnew | 25 400-26 900 |
| Kospel EKCO.R2 18 | heating elementnew | 32 000-35 500 |
| Vaillant eloBLOCK VE 18 | heating elementnew | 39 900-47 000 |
| Galan Geyser 15 | electrode | 8 200-9 500 |
| Beryl-15 Ion | electrode | 9 000-13 000 |
| Alternative energy VIN-15 | induction | 50 000-62 000 |
Video description
For another point of view on induction heating boilers, watch the video:
Along with many advantages, an electric boiler also has disadvantages. First of all, this is the formation of scale on electrodes and heating elements, which occurs due to heating and sedimentation of minerals contained in the liquid. Another disadvantage is the fear of “dry” heating, when during operation air enters the container and an oxygen plug is formed. The liquid stops flowing into the tank and contacting the heating element, which leads to the heating elements burning out completely.
Installation and connection
For proper installation of an electric boiler, you must follow the manufacturer's instructions and the basic rules and regulations of construction. First of all, you need to prepare the base if it is a floor-standing device, or the mounting bolts for a wall-mounted installation.
Next, the boiler is installed in a permanent location and the supply and return pipelines are connected to it. It is important to comply with safety precautions to equip the line with a safety valve, which is activated when an air lock forms or there is excess pressure.
Rating of TOP 8 best models
| Place | Name | Price |
| TOP 8 best electric boilers | ||
| 1 | EVAN Varmos-IV-18 | 30 000 ₽ |
| 2 | EVAN EPO-18 | 19 000 ₽ |
| 3 | EVAN Expert-15 | 42 000 ₽ |
| 4 | Proterm Skat- 21KR-13 | 42 000 ₽ |
| 5 | EVAN Expert-18 | 43 000 ₽ |
| 6 | RECO 15P | 26 000 ₽ |
| 7 | Proterm Skat 24 KR 13 | 39 000 ₽ |
| 8 | Zota 15 Lux | 22 000 ₽ |
