Now we will figure out how to choose a gas boiler with a built-in boiler and what is the difference between single-circuit and double-circuit ones. In the end, let's see who makes best models in this segment.
It is possible to establish and equip the hot water supply system in the house different ways. One option is to install gas boiler with built-in boiler.
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Boiler with built-in boiler
A single-circuit gas boiler is intended exclusively for heating the house - it does not have a built-in water heater that provides residents hot water. If you connect a boiler to it, it will heat water for various domestic needs.
The mechanism of dual-circuit units is more complex and their price is higher.
The main advantage of a gas boiler with built-in storage tank is that you do not have to additionally buy and install . In addition, the water in it heats up much faster than in single-circuit boilers.
For devices with two circuits, you can connect a separate boiler in order to hot water there were more. If you already have a single-circuit boiler, then in addition to it you can buy a special one, which is equipped flow heater liquids.
If you are the owner of an apartment that is small in size and you need to save space, then the most the best option will become a single-circuit boiler with a built-in boiler.
To avoid all sorts of problems that may arise due to incorrect installation of equipment, installation should be carried out by specialists.
Currently, you can find the following models of double-circuit boilers:
The main characteristics of wall-mounted boilers with flowing water:
Gas boiler device with built-in boiler
Advantages of gas heating boilers with a 40-60 l boiler:
Units with a boiler of 80-500 liters are of three types. The first two include devices that include all necessary details, they are compact and allow full control of the system. The third type includes boilers for which you need to install optional equipment and buy other details. As a result, in order to purchase all the missing elements, you will have to spend a lot of money.
As already noted, most users prefer single-circuit gas boilers with a separate boiler.
We note the main advantages of such devices:
Today, the leading manufacturers of gas boilers with a built-in boiler are: Electrolux, Ariston, Viessmann, Baxi, De Dietrich, Vaillant, Wolf, Chaffoteaux, Biasi.
| Manufacturer | Model | Characteristic |
|---|---|---|
| Electrolux | Electrolux GCB Magnum 28Fi | Gas wall-mounted boiler with a 60-liter boiler .
Power: 28.70 kW. Efficiency: 92.4%. Voltage: 220 V. Combustion chamber: closed. Heat exchanger: separate. Dimensions (HxWxD): 900x600x460. |
| Ariston | Ariston Clas B Evo 24FF | Wall-mounted gas boiler with built-in boiler. Power: 24.00 kW. Efficiency: 92.0%. Voltage: 220 V. Combustion chamber: closed. Number of circuits: dual circuit (heating and hot water). Heat exchanger: separate. |
| Ariston | Ariston Clas B Evo 30 FF | Accumulative capacity: 8 liters. Power: 30.00 kW. Efficiency: 92.0%. Voltage: 220 V. Combustion chamber: closed. Number of circuits: double circuit. Heat exchanger: separate. Dimensions (HxWxD): 943x600x460 |
| Viessmann | Viessmann Vitopend 100-W WHKB025 | Power: 25.10 kW. Efficiency: 90.0%. Voltage: 220 V. Combustion chamber: open. Heat exchanger: separate. Dimensions (HxWxD): 725x450x360 |
| Viessmann | Viessmann Vitopend 100-W WHKB026 | Storage capacity: 4 liters. Power: 30.00 kW, efficiency: 90.0%. Voltage: 220 V. Combustion chamber: open. Number of circuits: double circuit (heating and hot water). Heat exchanger: separate. Dimensions (HxWxD): 725x450x360 |
| Baxi | Baxi Nuvola-3 B40 280i | Designed for heating private houses, cottages, country houses, cottages up to 280 m², as well as for the organization of hot water. Features: boiler for 40 liters; separate heat exchangers; weather-dependent automation; LCD display; button control; brass hydrogroup; advanced functionality; programming. |
| De Dietrich | De Dietrich MS 24 | Wall mounted gas boiler with storage capacity for 6 liters. Power: 24.00 kW. Efficiency: 91.0%. Voltage: 220 V. Combustion chamber: open. Number of circuits: single circuit. Heat exchanger: separate. Dimensions (HxWxD): 730x400x299 |
Thus, by purchasing a gas boiler with a built-in boiler, you can achieve significant cost savings without losing functionality and ease of use.
Equipped with a stratified heating boiler, it is confidently conquering the market and the hearts of homeowners. However, manufacturers heating equipment we are sure that a number of models with a tubular heat exchanger can confidently compete with it. The fact is that in some cases, units with layered heating fail very quickly. In this article, we will reveal possible alternatives to such a device and tell you many technical nuances.
The traditional tubular heat exchanger is a small diameter tube laid in a spiral. Water for the heating system and hot water moves inside, receiving heat. The system is practical, but rather bulky, since high-power models are equipped with a free-standing boiler. Often, for the organization of the boiler room, you need to allocate a separate room.
The problem was solved when stratified heating boilers appeared. Inside such a unit is a series of plates, between which a small space is left. These plates heat the water circulating in the boiler. As a result:
However, many homeowners soon discover that stratified heating also has a number of disadvantages. Mineral deposits form on the plates, the space between them becomes clogged and the unit fails. It is especially important to consider this feature of plate heat exchangers in areas where the water is characterized by increased hardness.
In a plate heat exchanger, water warms up to about 80 degrees, which contributes to the active settling of deposits and clogging of narrow channels. If the mineral content is more than 140 mg/l, it is recommended to abandon the plate heater in favor of alternative devices.
An alternative is more compact models of double-circuit gas boilers, equipped with a built-in boiler indirect heating. Minerals can also be deposited on the pipes through which water moves, but this process proceeds much more slowly than with layer-by-layer heating. The design of such a boiler practically does not differ from a set of a single-circuit boiler and a boiler with a tubular heat exchanger. Both of these elements, as well as pumps and other fittings, are built into a neat, compact housing.
Please note that minerals also settle on the tubular heat exchanger, although this happens quite slowly. For effective work It is recommended to clean the boiler every few months. In addition, to reduce the rate of sludge formation, the heating control should be set to 54 degrees or lower.
This diagram clearly shows the difference in the operation of the two types of boilers described above.
Experts believe that for DHW systems big house a tubular heat exchanger is preferable to a plate heat exchanger. Since the distance from the heater to the point of water intake can be significant, it takes quite a long time to drain cold water. The problem is solved with the help of a recycling system. This is a segment of the plumbing system, through which hot water circulates between the heater and the point of analysis constantly, maintaining the set temperature. Such a device cannot be used with a plate heat exchanger, since mineral deposits will form on the plates very intensively.
IN small house the size of the equipment is important. Best Choice can become a compact boiler in which a large tubular heat exchanger is inserted. In this case, the pipes are placed in a spiral along the entire height of the boiler in order to quickly heat the entire volume of water at once. Increases efficiency correct location coil, for example, in the form of two parallel spirals. Such a device allows you to comfortably use even a small boiler, with a volume of only 10-20 liters.
Gas double-circuit boilers Vaillant is the best combination of quality and reasonable price. This heating equipment has long been known and enjoys well-deserved popularity.
When choosing a boiler, it is important to correctly evaluate its performance. Often, the manufacturer indicates only the initial performance, which is taken into account with a full tank of hot water. It is more important for the consumer to take into account the performance that the boiler produces with a regular flow of water. This figure is significantly lower than the original performance.
Another important point, affecting performance - temperature increase. The lower this indicator, the longer the boiler will work, and the less breakdowns there will be. Indicating the performance of the boiler, manufacturers are guided by various growth data. In general, the rule should be followed: the greater the power of the equipment and the volume of the boiler, the more productive the equipment.
More information about choosing a gas heating boiler is presented in the video:
We bring to your attention an online calculator for selecting a boiler, depending on the characteristics of your room:
For home heating, you can choose a combined system. How to do it, you will learn in our article:.
An interesting line of double-circuit gas boilers with a built-in boiler is represented by the Italian manufacturer Baxi. Such floor and wall models, How:
Most gas boilers are equipped electronic systems self-diagnosis, flame control, overheating protection and other safety modules. There is electronic ignition, the possibility of switching to liquefied gas, a programmable timer, etc. Prices vary in the region of 1500-2000 dollars.
Double-circuit gas boilers Baxi with a built-in boiler are compact in size, attractive in appearance, convenient control panel and the ability to automatically control the operation of the equipment
Gas boilers of another popular type are no less in demand. Italian manufacturer- Ferroli. Most often, buyers choose models:
These gas double-circuit boilers are varied in terms of power and type of installation (floor and wall), but all are distinguished by increased corrosion resistance and a convenient control panel with an LCD monitor. Outside, the heat exchanger is covered with a layer of aluminum anti-corrosion composition, inside there is an ionization electrode for protection against electro-chemical processes. Almost all models are equipped with electric ignition, two control microprocessors, pump blocking protection, etc. The cost of Ferroli gas double-circuit boilers varies quite a bit. a wide range: $1200 to $3000
Double-circuit gas boilers of the Italian manufacturer Ferrolli are well known on the market. Their main feature- European quality standards and increased reliability
Nova Florida double-circuit gas boilers, which appeared on the market relatively recently - in 1992, are distinguished by high quality. It is a trademark of the Italian company Fondital. Most often, buyers pay attention to the models:
Compact wall boilers this trademark relatively inexpensive: $ 1200-1500. The price of more powerful models can be $ 2500-3000. Methane or liquefied gas can be used to operate boilers. The equipment has a high degree of electrical protection, the control panel is equipped with a convenient LCD monitor. It is possible to automatically control the operation of the boiler using room and external temperature sensors.
Advice! Due to temperature fluctuations enamel coating the hull is cracking. More practical in this regard is the body of of stainless steel, although such boilers are more expensive. The anode located in the tank increases the resistance of the equipment to electrochemical corrosion.
Cast iron floor gas boilers are usually cheaper and are equipped with a single-level burner. To regulate the operation of such a boiler, installation is required. mixing unit, in which the automatic three-way valve. As a result, the savings will be minimal. good opportunities to reduce heating costs, condensing models are provided that use the energy generated by the condensation of steam.
The desire of every homeowner to provide his home with the necessary sanitary conditions and amenities, without overpaying extra money for it. It does not always make sense to organize a separate DHW system when there are simpler integrated solutions, for example, a gas boiler with a boiler. The main thing is to correctly calculate the required amount of water for household needs and select a unit of appropriate performance.
The advantages and disadvantages of double-circuit gas boilers are well known, they are good enough to serve 2-3 small consumers. But what if there are more consumers, and the use of electric water heaters is excluded? There are several modern solutions for this:
Practice shows that for a family of 3 people, for household and sanitary needs, it is enough to have a capacitive electric heater with a capacity of 50 liters in the house. Of course, the use of hot water within reasonable limits is implied. In order not to purchase such a heater and not to engage in laying extra cables and pipelines, you just need to choose a wall-mounted heating unit, inside which there is a tank with a capacity of 46-50 liters. Its design is two in one: a gas boiler with an indirect heating boiler inside. The principle of operation is also preserved: one part of the coolant goes to the heating system of the house, and the other goes to the coil of the internal boiler. Having reached a certain temperature of the water in the tank, which is determined by the sensor, the entire volume of the coolant switches to heating the house.
1 - fan - smoke exhauster; 2 – high performance heat exchanger; 3 - combustion chamber; 4 – storage tank made of stainless steel; 5 - control unit with display.
The design of the heater includes 2 circulation pumps, one pumps the coolant through the heating system, and the second through the boiler coil, while the burner operates at maximum for the fastest heating of the water in the tank. Later, the circuit switches to water temperature maintenance mode, which reduces fuel consumption.
For reference: Suspended boiler VIESSMANN with a capacity of 12.5 kW with a built-in tank with a capacity of 46 l, can provide a nominal hot water output of about 14 l / min when it is heated from +10ºС to +40 ºС.
More powerful wall-mounted gas boilers are equipped with tanks and larger capacity, but usually it does not exceed 100 liters.
14 liters or one and a half buckets of hot water for one minute is a good indicator, but this is far from always enough. The dimensions of suspended heat generators are limited, so large volume vessels cannot be placed in them. But it is the amount of heated water in the reserve that determines the long-term performance of the DHW system. And as a result, the weight of the structure, together with water, will become such that not a single wall can withstand it.
Many manufacturers offer heating units with a built-in tank in the floor version, but it also makes no sense to significantly increase their size in order to accommodate a large capacity inside. When you need more performance, you should pay attention to remote vessels for hot water.
Such remote boilers with a capacity of up to 500 liters can be connected to heat generators that provide such an opportunity. That is, to connect a free-standing vessel, the unit must have outlet pipes, and inside - a circulation pump serving the DHW circuit. At the same time, the power of the gas boiler is needed corresponding to the capacity of the vessel, otherwise the water in it will never reach normal temperature for use.
The fact is that the controller that controls the entire circuit keeps the heating system in priority. If the temperature of the heat carrier in the system circuits falls to the lower limit, the control unit will direct the entire power of the installation to increase this temperature, and then to the DHW circuit. In this situation, you can use the functions of the controller by programming the preparation of water at the required temperature at a certain time of the day.
Only a full-fledged indirect heating boiler equipped with an additional insert for electric water heating will help to remove all problems with an insufficient amount of hot water or its underheating. This solution will always maintain the temperature of hot water at a given level.
In this case, you will have to connect an external boiler for a gas boiler according to the scheme with circulation pump. One of the leading manufacturers of heating equipment VIESSMANN offers the following scheme for connecting a free-standing tank to a domestic hot water circuit:
A - hot water outlet; B - circulation circuit; C - circulation pump; D- check valve; E - discharge into the sewer; F- safety valve; G - valve; H - valve - flow regulator; K - boss for pressure gauge; L - check valve; M - emptying the system; N - connection to the water supply network; S - expansion tank of the DHW circuit.
The electric heater is supplied by the manufacturer as an option, it must be connected to the electrical network and connected to the controller of the boiler plant.
The use of gas boilers with a boiler is one of the best integrated solutions for providing a private house with heating and hot water at a reasonable cost. For this reason, they are gaining more and more popularity among homeowners, overshadowing the flow heat exchangers of dual-circuit units.
The hot water system in your home can be organized in different ways. Fortunately, manufacturers today offer various options. The easiest way is to install a hot water gas boiler that will heat water in its tank up to required temperature. True, this is not the most economical option, so there are better ways. For example, you can install a gas boiler with a boiler. What is it and how does it all work?
Let's start with the fact that there are two models that work on the same technology, but the boiler itself is located differently:
To do this, a gas boiler is purchased separately, a separate boiler. Here it is very important to accurately correlate the power of the boiler with the volume of the tank. It may happen that the performance of the gas boiler is not enough to heat the water inside the boiler to a certain temperature (often up to + 60 ° C) in a short period of time. And, therefore, you will not receive either hot water or an efficient heating system. Why?
It's all about the principle of operation of wall-mounted or floor-standing gas boilers with a boiler. It turns out that the coolant, heating up inside the boiler, is redistributed as needed. If inside the boiler the temperature of the water for household needs corresponds to the programmed indicator, then the coolant works for the heating system. As soon as the temperature gets lower, it is immediately redistributed to the DHW system. That is, the supply of coolant to the heating system is immediately turned off. And that means the temperature in the house is getting lower.
Floor standing with boiler
Attention! The larger the boiler in terms of volume you choose, the higher the likelihood that when the coolant is redistributed, the temperature in the house will always be lower than necessary. That is why we have already said above that it is necessary to accurately correlate two indicators: the power of the heating unit and the volume of the boiler.
Currently, manufacturers offer two options for this type of boiler:
In the first case, these are floor gas boilers with high power. In the second, this wall structures. And here the question arises, which one to choose? It all depends on what area you have to heat. If it is an apartment or a small Vacation home(dacha), then the second option. If it's big a private house, then only the first one. But keep in mind that each type has its own advantages and disadvantages.
With built-in boiler
For example, a double-circuit gas boiler with a boiler has a heat exchanger with a small cross section, that is, with a small cross section. This is a minus. In addition, salt and mud deposits are quickly deposited in them, which means that they will often have to be washed and purged. In addition, the maintenance of a single-circuit boiler and the boiler itself is simpler, in fact, the consumer receives a kind of central network through which the coolant moves, which is used for both heating and hot water.
gas boilers with a built-in boiler - these are two-circuit models wall type, where part of the thermal energy is spent on heating the water inside the tank, which is built into the body of the boiler itself. So to speak:
Boiler and boiler piping diagram
On Russian market wall-mounted gas boilers with a built-in boiler are not very popular. Our compatriots are trying to acquire units that create the least problems with their operation. Complex setup temperature regime, all kinds of switching, monitoring pressure and temperature - all this annoys us. Therefore, the Russians choose more simplified designs. And here a boiler (wall-mounted or floor-standing) with a separate boiler is the best solution.
Above, we talked about storage-type structures. That is, the water in the tank has a certain volume, which is heated. But there are models on the market flow type. In them, water is heated to a certain temperature as it moves through a special heat exchanger.
Usually, the heat exchanger is made of a material with high thermal conductivity, good corrosion resistance. Therefore, this assembly is most often made of copper, aluminum or stainless steel. But their form is serpentines, because they have to small amount install a heat exchanger great length. And the longer, the more efficiently the water heats up in it. By the way, water-heating gas boilers, which have already been mentioned above, work on this system.
simple circuit connections
So, we have established that single-circuit gas boilers with a separate boiler are considered the most popular today. Therefore, there is a need to identify all its advantages:
Boilers
So let's sum it up. At present, it is not difficult to organize a hot water supply system in your home. The main thing is to correctly choose the type and method of organization. As you can see, there are several options. Which one is right for you is up to you to decide. Our task is to consider the proposed modern market options and give recommendations on one way or another.
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All more consumers seeks to organize an autonomous heating system. The funds spent on the purchase and installation of heating equipment will soon pay off due to energy savings and the ability to independently regulate the power of the system.
The best way to heat private houses and apartments simultaneously with the possibility of obtaining hot water at any time and in the required quantity is to use a gas boiler equipped with a built-in boiler.
An integral part of such a heating unit is a tank designed for the accumulation of hot water. Its volume can vary from 10 to 100 liters. A secondary heat exchanger is built into the tank. The method of installing such a boiler largely depends on the volume of the boiler. Boilers with a capacity of up to 60 liters, as a rule, are wall mounted, more than 60 liters - floor. 
These units may have an open or closed combustion chamber. In the first case, the heating equipment operates using traditional chimneys, in the second, combustion products are removed through coaxial chimneys.
Attention! The power range of boilers with a built-in boiler usually starts from 28 kW.
To get hot water, just open the tap. While hot water is consumed, the boiler heats up its new supply.
The gas boiler with a boiler is ideal solution when using several points of water intake (2-4) and provides the following advantages:
Attention! Double-circuit conventional boilers in this case may simply not be switched on for heating water in the DHW circuit.
Among the boiler equipment equipped with storage tanks, units of the Beretta and Protherm brands can be distinguished.
The Italian company Beretta is engaged in the production of heating equipment of all types. The products of this company belong to the economy class, but only high-quality materials are used for its manufacture.
Beretta Boiler 28 BAI is a wall mounted turbocharged boiler with a 60 liter stainless steel boiler. The power of the unit is 28 kW.
Features of the model that ensure its comfortable and safe operation:
Advice! The Safety Baby function can only be activated via communication with the service department.
Attention! Connecting the programmer and the outdoor temperature sensor provides the function of weather-dependent regulation of the coolant temperature.
On the control panel there are: a thermomanometer, an operating mode switch, a heat carrier temperature regulator in the heating circuit, a water temperature regulator in the circuit responsible for supplying hot water, an indicator that reports on the state of the boiler.
The cost of this unit is approximately $ 1,500.
The boiler of the Protherm 30 KLZ model is an excellent solution for those who, along with an efficient heating system, wants to have an uninterrupted supply of hot water in the required quantity. The unit is equipped with a horizontal boiler with a capacity of 90 liters.
Design features of the Protherm 30 KLZ gas boiler:
Attention! The Protherm 30 KLZ unit is used for heating and supplying hot water to private houses, apartments, office space, small industrial enterprises that have running water.
The approximate cost of the unit is $ 2,500.
