Gas double-boilers heating - the perfect solution for

Nowadays, an increasing number of people want to become as independent as possible from centralized systems for supplying hot water, heating, etc. Sometimes the installation of autonomous heating systems is a necessary measure, the necessary communications are hardly laid out beyond the city limits, and the country house also needs heating and hot water.

Heating boilers in this situation become a real salvation.

Types of heating boilers

At the moment there are many models of boilers on the market, there are both imported and domestic devices. Before the choice is not superfluous to get acquainted with the types of these devices and the principle of their work.

As for the classification of boilers, a lot depends on the criterion underlying it.

So, by the number of contours are distinguished:

• single-circuit - can be used exclusively for home heating;
• heating double-circuit gas boilers - the “bonus” to the basic function (heating of housing) is the ability to use them to provide hot water to households.

By the method of installation can be identified:

• wall gas heating double-circuit boilers - mounted on the wall and take up very little space;
• floor models - differ in solid dimensions.

In addition to standard models, you can separately select:

• turbo boilers - the main difference from the conventional design is the presence of forced traction, to create it using a conventional fan made of heat-resistant material;

• nonvolatile devices - for their work does not require electricity.

Note! Independence from the power supply makes them a desirable choice for country houses, where power outages often occur. In this case, a boiler that can operate in different modes will be a good choice, of course, the price of such a device will be higher than the cost of a conventional heating boiler.

The device and principle of operation of the heating boiler

The double-circuit heating gas boiler differs from the single-circuit one primarily by the presence of 2 heat exchangers. One is used to heat the heating medium of the heating system, and the second - to meet the human need for hot water.

Moreover, the design of any boiler of this type looks approximately the same (regardless of whether Italian, German, Turkish and other devices are compared). The main nodes remain the same.

The double-circuit gas heating boiler works according to the following scheme:

• heat carrier for the heating system is heated in the main heat exchanger, the heat source is a gas burner;
• water heating for hot water supply takes place in an additional heat exchanger, here 2 circuits are located side by side, and tap water receives heat from the coolant.

Note! Gas double-circuit heating boiler may well have an additional burner to provide hot water. Such solutions can be found not only from well-known manufacturers, for example, ferroli, but also in models of the average price category.

Gas Turbine Boilers

Heating gas double-circuit boilers with a turbo system can be considered the pinnacle of engineering art - they appeared relatively recently. Manufacturers are trying to equip such devices to the maximum, for example, Ariston equips such boilers with an LCD display, from which all functions are controlled.

Using the turbo system allows you to achieve that:

• the air directly from the room into the boiler is not absorbed, the design provides for the entry of air from the street;
• double-circuit floor gas boilers with a turbo system allow you to do without the usual chimney, respectively, there is no restriction on the place of installation, it can be placed in any room;

• The efficiency of this design is higher than that of the usual atmospheric counterpart. In addition, manufacturers have made every effort to have the right to name their products as the most environmentally friendly and economical, so the efficiency is really high, about 90-95%. Some manufacturers closely approximated this indicator to 100%, for example, the Beretta CIAO 24 N CSI model under load produces an impressive 98% efficiency.

Non-volatile boiler

Some of these structures are called almost a relic of the past, but this is too one-sided judgment. Of course, such models cannot be compared with conventional boilers in popularity, but they are not going to reduce their presence in the market.

Unlike volatile, independent of electricity, floor double-circuit heating gas boilers work only with heating systems with natural circulation. Moreover, in terms of efficiency, this is not the best choice.

Note! To ensure the normal circulation of the coolant will have to burn a lot of gas. Therefore, the efficiency of nonvolatile devices is small. For example, the model Electrolux FSB 25 P efficiency does not exceed 91%.

For such models, the correct organization of the heating system is of great importance from the point of view of efficiency.

Instructions for improving efficiency looks like this:

• special attention is paid to the slope of the pipeline. It must be constant, which will ensure the normal circulation of the coolant;

Note! Gas consumption can vary over a wide range. For example, the model Ferrol PEGASUS TP 45 regulates the gas flow in the range of 2.08 - 5.24 m³/hour. If the bias is not maintained, the gas consumption will increase.

• it is desirable that the heating system has a large inertia, for this it is better to use large diameter pipes;
• when a non-volatile dual-wall wall gas boiler for heating is only calculated, it is necessary to take into account not only the area of ​​the room, but also the volume of water in the system.

Flour choice, description of popular models

When a person is just beginning to study the double-wall gas heating boilers (and the floor-mounted boilers too), then the eyes of a variety of models just run up. The number of models even in one manufacturer is in the tens, so making the right choice is not such an easy task.

What you should pay attention to

When choosing, attention should be paid to such questions:

• if the main function of the boiler is heating, then it makes sense to pay attention not to floor-standing gas-fired gas boilers, but to single-circuit devices;
• as far as power is concerned, it is necessary to proceed from the proportion of 1 kW per 10 m² area, it is desirable to add about 15-20% just in case.

The power of most 2-loop boilers is enough to heat a cottage with an area of ​​over 200 m². For example, the power of Baxi slim boilers ranges from 24.5 to 29.7 kW, which is enough for a solid house with about 200 m²;

• You need to take into account the space for the device. For example, wall-mounted gas double-circuit heating boilers are suitable in the case when floor-sized counterparts cannot be placed in the house. Wall-mounted devices are a little less powerful, but with the installation of their own hands is unlikely anyone will have problems;

• if at hand you need to constantly have a supply of hot water, then it is better to install a boiler. In this case, the stock will always be;
• It is necessary to take into account the ratio of the cost of heat for heating the home and for the needs of hot water. Sometimes it happens that it takes more heat to heat the water, in which case it would be logical to use compact wall-mounted gas double heating boilers in conjunction with a boiler;

• cost also plays an important role. If the budget allows, it is better not to stop at all very cheap versions of boilers. Not necessarily the device will be defective, but such dual-wall gas-fired boilers for heating (and floor-standing) most often sin with marriage.

Boilers from popular manufacturers

It is impossible to describe in detail the characteristics of each model, therefore it is better to concentrate on the disadvantages and strengths of boilers from different manufacturers, which were revealed by operation in real conditions.

Judging by the customer reviews:

• boilers from Vaillant - quite unpretentious, work fine even with low pressure in the water supply. It is quite sensitive to the quality of water, so it is better to install filters on the water supply system. Even if you forgot to invite technicians for routine inspection, the boiler will work through the winter without any problems;

• Baxi - considers it one of the leaders in Europe, but in Russia so far this producer is treated with caution. Devices from this manufacturer are quite sensitive to stress and strain; there may be some minor problems with sensors that display water pressure;

• Viessmann he is Wasserman, although such a transcription is fundamentally wrong. Almost perfect boiler, and most of the negative reviews associated with improper adjustment and excessive load on the device;

• Junkers - the main problems with the products of this manufacturer are most likely due to the lack of necessary components. Occasionally, the not quite correct electronic ignition may occur. By the way, at the moment this company has become a structural division of Bosch, so some confusion in the names should not confuse you;

• Navien - different democratic price and good quality for the money. The pump can work too noisy and often fail, but in terms of cost-performance, there is practically no alternative.

Summarizing

For a modern country house, the presence of a heating boiler is more a necessity than a whim of the owner. Thanks to this simple device in the house will always be comfortable. The article is more of an introductory nature and will be useful to those who are just going to seriously engage in autonomous heating (see also the article Gas-fired boilers for a private house - the subtleties of choice).

The video is a small overview of the budget 2-circuit boiler.