Among the heating equipment, gas double-circuit boilers are the most popular. Units of this type are considered the best-selling, due to the combination of two functions in one device. If necessary, you can also heat water for domestic needs, and maintain the optimum heating temperature in the house. Let's take a closer look at what a gas double-circuit boiler is. Reviews and useful tips from professionals will also be given in our review.
A little bit about the device
Let’s figure out how to get hot water and maintain the temperature of the heating system. It is easy to assume that for this the boiler should be equipped with two circuits. According to one of them, water enters the heating system, and the second is heated for domestic purposes. The heat exchanger in most cases is one, although today there are models with two heating elements. This somewhat complicates the design, but makes it universal. The heat exchanger is installed over a gas burner, which can be atmospheric or inflatable, but more on that later. As a result of the combustion of fuel, in our case it is natural gas, a certain amount of heat is released, which diverges along the metal walls of the heat exchanger. He releases heat to the radiator, which transfers it to a fluid moving in a closed loop.
In principle, the gas double-circuit boiler reviews are mostly positive. Nevertheless, the percentage of good responses is closely related to the manufacturer. As noted above, there are two types of double-circuit boilers for the installation of a heat exchanger. The first contains a primary and secondary heat exchanger, the second - biometric (pipe in pipe). Well, now let's move on.
The principle of operation of double-circuit boilers
The heat carrier is located in the heat exchanger: in our case it is water, which is heated during the combustion of natural gas. Most modern double-circuit boilers can heat water in a wide range from 35 to 80 degrees Celsius, although these figures may vary depending on the model and manufacturer. A heat exchanger is located above the combustion chamber; in most cases it is made of copper and has additional external insulation. When the burner starts to work, the heat carrier heats up to a certain temperature, which is set manually. After that, the pump is turned on, which circulates water through the system. When the desired carrier temperature is reached, the unit enters the economy mode, that is, to a reduced gas supply. This is the main advantage that a gas double-circuit boiler has. Reviews say that in this way you can achieve fuel savings of 5-15%.
Water coming from a central water supply is usually of poor quality, that is, it contains a high content of manganese and calcium salts. When the temperature rises, they give a precipitate, as a result, a coating forms, which impedes the movement of the coolant. But this concerns the second circuit, which heats water for consumer needs. The first circuit is closed, so it is less exposed to contamination. To avoid unforeseen problems, it is recommended to install several filters at the input. This will save your gas double boiler. Reviews say that it is better to put a filter of hard and soft cleaning. Now let's look at the placement options.
Double-circuit gas boiler floor: consumer reviews
To date, there are two options for placing boilers: wall and floor. Which one is better? Now we will try to figure it out. But we can immediately say that among consumers there are adherents of both the first and second options. This is due to many factors. Most people choosing floor standing boilers need a lot of hot water for domestic use. And since the performance and, in fact, the power of such units is many times greater than wall-mounted, this is the best choice. The dimensions of the boiler, mounted on the floor, are quite large, and the body is made of cast iron and steel. Reviews of most consumers indicate that such boilers are very convenient to maintain, especially if the equipment is mounted in a free room. In addition, the design allows you to place all the necessary components inside, for example, a heat carrier of greater power, etc. If you live in your house or large apartment, it is better to buy a gas double-circuit boiler. Reviews say that in this situation, the power of a wall-mounted boiler is often not enough. But there is also another way - to hang equipment on the wall. Let's look at it too.
Double-wall gas boiler: customer reviews and tips
This option is somewhat more interesting than the above. This is partly due to the fact that they are released not so long ago, but because almost all models are equipped with the latest equipment. Nevertheless, we can say that such units have a large number of complex electronics. On the one hand, this ensures accuracy, but on the other hand, devices are extremely dependent on constant voltage. Swings in the network can adversely affect modern equipment and disable it. This is evidenced by consumer reviews. But this problem can be fought. For example, install a rectifier to connect a boiler through it.
The dimensions of the wall-mounted boiler are small, so everything that is in the case is made either of special material, or small-capacity equipment is installed in the unit. For example, all the pipes there are thin-walled and very sensitive to water quality. By the way, antifreeze can be used as a heat carrier - this is the main advantage that a gas double-circuit wall boiler has. Customer reviews suggest that such systems are much more efficient in heating a room. As for the power of these boilers, it is really slightly lower than those that are installed on the floor. Nevertheless, the efficiency in most cases is not less, and sometimes even more. This is an ideal solution for medium to small sized rooms. Now let's go through the manufacturers.
Reviews on the products of the company "Beretta"
Although boilers from this manufacturer are in great demand among consumers, they do not always have unambiguous reviews. In particular, products of the low price range are not known for high quality, while expensive models - for better assembly. In general, we can say that the Italian Beretta boilers are economy class products, so you can’t expect any supernatural results from them. The company manufactures devices for both floor and wall placement. In the assortment there are options for 12,000 rubles, and for 240,000 rubles. As noted above, the dual-circuit gas boiler Beretta has mixed reviews.
Some users say about the high quality of the product and good efficiency, which is about 92%. In addition, adherents of wall-mounted models cannot but note not only the compactness of the product, but also its light weight. So, the CIAO 24CAI model with a power of 23.8 kW of the wall type weighs only 29 kilograms. The cost of this unit is approximately 31,000 rubles. But to say that such a boiler is able to provide large needs for hot water is not necessary. Nevertheless, for a family of three, this option is suitable. Based on the fact that the double-circuit gas boiler "Beretta" has mixed reviews, we can say that you need to carefully choose. The more expensive the product, the less chance it will break quickly.
Bosch Boilers
Boilers from Germany are considered one of the best. If we talk about such an international leader as Bosch, their heating equipment is valued for its high quality, durability and accuracy. Among the manufacturer's range there are both budget and exclusive expensive models. But, regardless of the price range, any Bosch double-circuit gas boiler has positive reviews. An example is the Bosch brand boiler WBN 6000-18C RN worth 35,000 rubles. The unit with an output of 18 kW, wall-mounted, is able to provide heat to a small room. The maximum boiler performance in terms of hot water is about 8.5 l / min, which is acceptable. Product dimensions (WxHxD) - 70x40x29.9, respectively. The weight of the product is only 32 kilograms.
All Bosch water heating and heating equipment is equipped with heat exchanger protection against overheating. The temperature range of the coolant is 30-85 degrees. If you appreciate the high quality and durability of your work, then your choice is the Bosch double-circuit gas boiler. Reviews in 95% of cases are positive. Consumers note the high quality of the heat exchanger, attractive housing design (regardless of model) and good service. Nevertheless, about a famous brand will have to overpay about 5-10% of the total.
Ariston - boilers from Italy
The company was opened back in 1960. Since then, she has been developing heating equipment. Today, Ariston boilers are known worldwide for their excellent quality. For the most part, the company is engaged in the manufacture of productive wall units, but the range also has floor options. If you need a silent model, which will also be easy to maintain, then you can safely choose a double-circuit "Ariston" gas boiler. Customer reviews are almost all good. So, they note the quiet operation of the unit and its efficiency. But there are significant drawbacks. For example, for some users, electric ignition is a significant minus, since when you turn off the electricity, you can be left without heat and hot water.
Consumers also note that Ariston boilers very quickly reach operating temperatures and switch to economy mode. Another important point is the compactness of most wall-mounted models, many of which do not weigh more than 35 kilograms. Based on the foregoing, we can conclude that if you want to get not only a good appearance, but also fast and silent operation, then choose a double-circuit gas boiler Ariston. Reviews say that the products are really worth your attention, especially since their price, despite a fairly well-known brand, is acceptable.
What else is worth saying about 2-circuit boilers
You probably noticed that a lot depends on the manufacturer, but it is worth saying a few general points. For example, it is mandatory to have an expansion tank for regulating the pressure of a closed system. Of course, more modern boilers are equipped with sensors (manometers), which at critical pressure values transmit a signal to the control element. The latter blocks operation until the system is drained of water. Another important point is the control system, which is equipped with gas double-circuit heating boilers . Testimonials indicate that a remote control system is more preferable, as it is more accurate and contributes to gas savings. Today, most boilers are equipped with a self-diagnosis function. The unit will independently detect any deviations from normal operation and signal you about it. But not all devices are equipped with such systems, a striking example of this is the Buderus double-circuit gas boiler. Reviews, however, are good about him, due to the high build quality.
What experts advise
It is important to take into account what professionals say about double-circuit boilers. Here, experts draw your attention to the following. If you want to get a product of high quality and at a relatively low cost, then a double-circuit gas boiler “Proterm” will be a good solution. Reviews on this product are pretty good. Despite the fact that this brand is still not too well-known, the company's products are very popular. The lineup has both floor and wall models. Nevertheless, it is not recommended to opt for the most budgetary ones, since their quality is often at an insufficient level. If we consider the high price range, then professionals pay special attention to "Bosch", "Ariston", "Westen" and others.
Conclusion
We have reviewed quite a few well-known manufacturers of modern boilers. As you can see, everyone responds differently. Of course, there are many other good heating systems, for example, Baxi double-circuit gas boilers. Reviews about this manufacturer, although ambiguous, but almost no negative. Many consumers notice the possibility of connecting “underfloor heating” through a boiler, which is a significant advantage of Baksi boilers. In addition, the double-circuit Ferrol gas boiler enjoys an excellent reputation among the population. Reviews about this Italian brand are very good. Of course, many sometimes note too high prices, but there are no complaints about the quality of the product. That, in principle, is all that can be said on this topic. When buying, always pay attention to the rating of the boiler on the Web and what consumers say, because this will give you a lot of useful information.