To organize autonomous heating in a house, you will need to carry out many calculations and select all the necessary components. The air in the room is heated by circulating hot water through radiators or other coolants.
The selection of a boiler for a small and large house is done differently - if the heated area is 80-100 sq. m., then you need to choose which boiler is better for a private house of 100 sq. m. 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.
Boiler options that are successfully used for heating residential premises Source megaplast.com.ua
Video description
In our video we’ll talk about heating in a private country house. Our guest is the author and presenter of the Teplo-Voda channel Vladimir Sukhorukov:
- A gas boiler . It is used when a gas pipeline is connected to the house. In addition, this heating option is the most economical. If the house is used for periodic residence, you can use a gas holder. But it should be taken into account that in this case the financial costs will increase significantly.
- Solid fuel boiler . For its operation, firewood, coal or briquettes are used as energy carriers. For stable operation of such a boiler there is no need to use power. If the equipment has an electronic control circuit and there is no electricity, power can be provided using a battery. But there is one drawback - you need to equip a place for fuel.
Solid fuel boiler Source mybuilding.tips
- Liquid fuel boilers . When using this heating option, you must adhere to all safety regulations, since such devices are more susceptible to accidents.
- Electrically powered boilers . Such devices are used both as an auxiliary element for heating water at a time when the main heating system is temporarily turned off, and as the main type of heating (when the use of gas or solid fuel equipment is unavailable).
See also: Catalog of companies that specialize in home insulation.
Floor or wall mounted boiler
| Floor-standing | Wall mounted | |
| Weight | 60-80 kg | 30 – 40 kg |
| Heat exchanger and service life | The design of the floor-standing boiler uses a steel heat exchanger with a service life of 25-30 years | The wall-mounted boiler uses a copper or stainless steel heat exchanger with a service life of 15-20 years |
| Electricity addiction | The automation of floor-standing boilers operates on mechanical components. And the electric pump is usually installed separately. | The smart electronics of the wall-mounted boiler, as well as the built-in pump, require electricity. |
| Economical | Mechanical automation does not provide the same economic benefits as wall-mounted | Due to the use of smart automation, the economic benefit from using a wall-mounted boiler is 10-15% |
| Reliability | Due to the absence of electronic components, a built-in pump, a floor-standing boiler is more reliable | Wall-mounted boilers sometimes develop errors in the operation of electronic components. In most cases, these problems are solved by restarting the boiler. |
What to look for when choosing a boiler
According to state standards, an insulated room has a heat output of no more than 10-12 kW. In this case, a boiler with a power of 11 kW will be sufficient.
An insulated house retains heat longer Source fvn.no
Choosing which gas boiler is best for a private house of 100 sq.m. – it is necessary to take into account the characteristics of the gas pipeline. If there is a pressure in the line of at least 1.5 bar, you can opt for a model with a power of up to 14 kW. The reason for this is:
- the need for a free reserve of boiler power for optimal operation in winter;
- the ability to cover heat leaks , which are possible even with full insulation of the house;
- When using heating in the form of a warm floor (without radiators), the heat transfer of the medium is reduced.
A large range of boilers offer different functions. An installed boiler can not only heat the room, but also heat water as needed. The best option is a model that can heat up to 7 liters of water per minute. For comparison:
- an 11 kW device heats water from 3.5 to 5.5 liters per minute;
- with a power of 17 kW - water heats up from 5.5 to 9 liters per minute.
A modern alternative for providing heating and hot water supply Source teh-dom.ru
In addition, it is very important to take into account the efficiency of the boiler . The higher the indicators, the less gas is consumed, which leads to a significant reduction in the heating budget. For comparison:
- domestic brands of boilers have a coefficient of 50 - 80%;
- European – 95%.
Prices: summary table
| Model name | power, kWt | Efficiency, % | Gas consumption, m3/h. | price, rub. |
| BAXI ECO Four 1.14 F | 14 | 92,5 | 1,6 | 47 000 |
| Baxi SLIM 1.150i 3E | 14,9 | 90,3 | 1,74 | 83 000 |
| Buderus Logamax U072-12K | 12 | 92 | 2,1 | 41 000 |
| Teplodar Cooper Praktik 14 | 14 | — | — | 20 000 |
| Stropuva S15U | 15 | 85 | — | 99 000 |
Main characteristics
To find out which gas boiler to choose for heating a house of 100 square meters, you should consider their main characteristics.
First of all, this is the method of installing the equipment:
- floor-mounted boiler options;
- wall installation option;
- parapet connection.
The mounted boiler is not the most powerful, but fits harmoniously into the interior Source sovetclub.ru
Then you should pay attention to the number of circuits:
- single-circuit ones are used exclusively for heating the room;
- double-circuit ones are used for space heating and water heating.
It is important to pay attention to the type of burner:
- normal - oxygen is supplied to the fire due to natural draft;
- inflatable - air is pumped by a fan;
- combined.
There are several ways to adjust the boiler power per 100 sq.m:
- Single stage. After reaching the set temperature, it operates on the fuse.
- Two-stage. The set temperature is reached, after which it switches to 40% power.
- Smooth two-stage. It works like the previous option, but with a smooth change of modes.
- Modulated - works in several modes.
Camera type being considered
- open option. For its operation, air comes directly from the room where the device is located, this process occurs naturally;
- closed option. Using a special pipe, air is pumped from the outside of the room.
Starting a gas boiler Source en.decorexpro.com
The type of draft is as follows:
- normal - due to convection;
- injection - using fans.
The burners are ignited as follows:
- electric ignition - powered from the network;
- piezo ignition – a spark is generated by a piezoelectric element;
- lighting with matches.
And you should definitely take into account the material that was used to make the heat exchanger:
- steel;
- cast iron;
- copper.
How to choose a boiler for heating a private house of 100 square meters. m. for heating water for household needs
Boilers can be single- or double-circuit. From the name it is clear that a single-circuit boiler does not have a device for heating water and is used only for heating. Accordingly, a double-circuit boiler has a built-in heat exchanger for heating it. Water is heated not by direct heating from combustion or from a heating element, but from a coolant that circulates inside the heat exchanger. Thanks to this technology, it is possible to minimize deposits of mineral salts and prevent overheating and boiling of water in the system.
However, if you decide to use an indirectly heated storage water heater. About its advantages in another article. Then you should choose a single-circuit boiler. Most electric and gas modern boilers have fairly simple automation for connecting it.
You cannot use a double-circuit boiler (namely a DHW circuit) when connecting a separate boiler. The physics of the boiler operation is completely disrupted. And if the water stagnates, it will not be disinfected at elevated temperatures. And this in turn will lead to the formation of legionella bacteria in the boiler.
There are boilers for sale with an already built-in boiler. As a rule, their volume is small. Buying such boilers is justified, but not budgetary. In addition, the choice is very limited.
If the budget is limited and there is no need to create a hot water recirculation system. It is quite justified to use a double-circuit boiler. However, when family members take a shower, there will not be enough hot water to wash dishes at the same time. Well, you understand...
On the contrary, if the priority is to create a full-fledged hot water system, then an indirect heating boiler is justified. Of the minuses additional. costs plus space required to install the equipment.
Review of some types of heating devices
To understand which boiler to choose for heating a house of 100 square meters, you should consider some options.
AOGV 11.6(M)
This is a domestically manufactured two-hull device, has a power of 11.6 kW, and is capable of heating water up to 2 l/min. Floor mounted boiler. The price is within 17,000 rubles.
Operation diagram of a classic gas boiler with a traditional layout AOGV 11.6 Source master-electrician.ru
Required power
This parameter depends on the area of the room. For every 10 m² with a ceiling height of 2.7 m, about 1 kW/hour will be required (provided that the home is built according to the standard and is well insulated). To heat brick houses near Moscow with an area of 100 m2, you need 10 kW/hour. Approximate cost calculation for the cold season (October to March), i.e. for 6 months, 30 days and 24 hours a day:
10×24×30×6 = 43200.
At a cost of 1 unit of heat = 5.56 rubles. maximum expenses will be = 240,192 rubles.
Dual-circuit devices will require 10-15% more power. In addition, calculations are always made with a margin (+20%). But the heating boiler does not operate at maximum load. Economy mode will greatly reduce energy losses; their total figure can be reduced by 70%. As a result, heating costs will amount to about 16 thousand rubles. per month.
The calculation also takes into account the operating efficiency of the boiler or its efficiency. This is the ratio of useful and consumed energy indicators. For the same boiler, the efficiency may vary depending on the type of fuel used and operating mode. For example, for gas devices this figure is 88-94%, solid fuel - 82-89%. Electric boilers are the most efficient, their efficiency approaches 100%.
Tips and tricks
Experts do not give direct instructions on choosing the type of equipment. In practice, the difference between the operating efficiency of heating elements, electrode and induction boilers can be only 2%. And the savings declared by the manufacturer are offset by additional costs.
For example, devices with a coil are expensive and heavy. High-reliability fasteners must be purchased separately. Sometimes you have to spend money on equipping a boiler room, since when such devices operate, a vibrational hum occurs.
Electrode boilers operate with a high degree of efficiency if the coolant meets the chemical composition requirements. This is the only way to achieve the required resistance and conductivity indicators. Tap water is not suitable in this case, and its preparation is an additional expense. Electrode boilers also require expenses for preliminary debugging, which is carried out by specialists.
Therefore, heating element devices are often considered the best choice. They are economical, easy to install and maintain. But devices have to be changed relatively quickly, since their service life is shorter than that of other types of equipment.
Disadvantages of electric boilers for heating
Among the disadvantages are:
- cost of fuel costs;
- a certain power of electrical panels and network voltage are required;
- If there are power outages, the house will be cold.
In an unstable situation in our country, the price of electricity changes dramatically. This factor is difficult to predict: one day the cost drops significantly, the next it rises. But even when fuel prices rise sharply, it is cheaper to use an electric boiler than a gas one. Therefore, this point will only affect the fact that it is difficult to predict costs in advance.
In some regions, there is a limit on the amount of electricity consumed by one home. The supplied power may easily not be enough to keep the room constantly warm.
Many existing electrical networks are already fairly worn out by time, especially in old buildings. Also, an out-of-date network design may not withstand voltage and may not provide sufficient power.
It is better to make new wiring for the boiler to minimize the possibility of short circuits and fires.
Electricity is a product that cannot be stocked for the future. And in the event of any breakdown, the power plant will have to be without heating.
If there are no problems with the supply of electricity, you can safely opt for an electric boiler. Electricity consumption will increase only during the heating season. You can independently regulate the amount of fuel consumed by changing the boiler power. You don’t have to worry about the risk of explosion as in the case of gas and that you will run out of wood for solid fuel.
It is wise to take advantage of the benefits provided by the state during the heating season. An option could be a discount for a resident representative of a preferential category or a subsidy.
Recommended popular models
TENKO mini KEM 4.5–220 is a typical example of a super-economical electric boiler. This is one of the most popular boilers for minimal money. Single-circuit, wall-mounted, single-phase. Power – 4.5 kW, suitable only for a small apartment. TEN heating is used. A voltage of 220 V is enough for it, so it is suitable for an apartment in an apartment building.
LEBERG ECO-HEATER 18E is an expensive, high-quality single-circuit electric boiler designed for heating. It has a wall mounting type and heating element. Suitable for small private houses, with a power of 18 kW. The connection is exclusively three-phase.
HI-THERM HiT-8 is a double-circuit boiler that is suitable for both heating and heating tap water. Wall-mounted type of installation, copper is used as a heat exchanger, and water is used as a coolant. Power – 8 kW, has 100% efficiency, that is, it consumes the same 8 kW.
RODA STORM SL 30 is a boiler that is enough to heat a house of 150 m2, because its power is 30 kW. For operation, a three-phase connection with a voltage of 320 V is used. New heating element heater, model with wall-mounted installation.
