We get hot water from a gas boiler - options with and without a boiler. Gas boilers with boiler Gas heating boiler with boiler

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Gas boilers are generators that generate heat for heating indoor air and heating water by burning liquid fuel - gas. It is possible to install a gas boiler with a built-in boiler only if it is possible to connect it to the main gas pipeline. In the absence of gas supply, it is impossible to use such heating equipment. What gas boilers look like can be seen in the photo.

Differences between single and double-circuit boilers

A single-circuit gas boiler with a boiler can only heat the room - it does not have a built-in system, which is necessary to provide hot water supply. But if you connect a remote boiler with a heat exchanger to it, then it will be able to heat water for domestic needs.

Double-circuit boilers have a more complex device, respectively, and they are more expensive. They serve to heat water not only in the heating system, but also in the water supply system. In order to increase the amount of heated coolant, a boiler can be connected to such boilers.

Boiler features

Boilers are used to organize hot water supply for consumers' needs through taps. Having such a device in their home, its residents will not depend on the presence of hot water in the tap.

Boilers can use different types of energy:

household gas;
electricity;
thermal energy generated during the operation of the boiler.

Regardless of what type of device was chosen by the consumer, its installation must be coordinated with competent organizations and entrusted to specialists, so that subsequently there will be no problems. It is very important to make the correct connection of the equipment - in this case, a double-circuit gas boiler with a boiler can be highly efficient and provide hot water, which will be supplied not only to the heating system, but also through several taps simultaneously (see also: "").

Boiler location in the house

There are gas boilers with wall-mounted and floor-standing boilers. It is floor appliances that are most common. It is recommended to place them in utility rooms. They usually have a mass of less than 100 kilograms and are atmospheric or blower type burners.

Wall mounted boilers are often installed in apartments and small houses. They weigh less than 100 kilograms and are small in size, so they can be hung on the wall. To save space, you can install the boiler in a niche (read: "").

The advantages of double-circuit boilers and their use

Double-circuit boilers are more functional, but they are also more expensive. Before buying, you should decide how exactly the equipment will be used.

Currently, the following models of double-circuit boilers are presented on the market:

with a flow-through water heat exchanger;
with a built-in boiler for 40-60 liters;
with a built-in boiler for a volume of 80-500 liters.

The choice of a boiler is influenced not only by the price and installation method, but also by the needs of the residents of the house for hot water.

Hinged boilers with a flow-through water heat exchanger have the following features:

simultaneously heat rooms with a total area of up to 300 "squares", and also provide two water points;
small size allows you to build equipment into a wall niche;
low cost;
simple and inexpensive installation;
uncomplicated management;
the presence of self-diagnostic elements.

Gas heating boilers with a boiler with a volume of 40-60 liters have a number of advantages:

able to heat a house with an area of up to 300 "squares" and provide a simultaneous supply of water directly to 4 water points;
Ease of controls;
the presence of a self-diagnosis system.

Boilers with a boiler for 80-500 liters are of three types. The first and second of them include devices equipped with everything you need, having small dimensions and allowing you to fully control the system. Boilers of the third type require the installation of additional equipment and various components. As a result, you will need to spend a lot of money on the purchase of all the required elements and the work of qualified specialists.

The device of a gas boiler with a boiler, a detailed video:

How to choose a gas boiler

When choosing a gas boiler for your home, you need to pay attention to various technical characteristics (more: ""). As for the material, such a device must be made of cast iron or steel. Steel models are more prone to corrosion caused by condensation. Their service life usually does not exceed 15 years. Cast iron boilers last up to 50 years, but they are much more expensive than steel ones and weigh twice as much (read: "").

It must be borne in mind that floor-standing gas boilers cannot be installed in residential premises - a basement or utility room must be allocated for them. The floor in the room where the boiler will be installed must be made of non-combustible material. Installation of wall devices is easier. They are small in size and can be placed in wall niches or furniture cabinets. In any case, the connection of the boiler to the gas boiler must be carried out by specialists (read: "").

Boilers with built-in gas burners do not allow you to replace a damaged burner yourself. Blast products are bought separately from the boiler, and in the event of a breakdown, they can be replaced by yourself. In addition, devices with this type of burner have a higher efficiency. Read also: "".

The main characteristic of boilers is power. If the house is well insulated, and the ceiling height is no more than 3 meters, then 1 kW of power is enough for heating 10 "squares". Thus, for a house with an area of 100 "squares", you should purchase a device with a power of 10 kW. If the building does not have good thermal insulation, and the ceiling height is more than 3 meters, then the boiler power must be higher. In order to get also heated water for domestic needs, you need to choose equipment, the power of which is 30-50% higher than the recommended one. It is better to entrust the connection of the boiler to a double-circuit boiler to specialists.

A floor-standing gas boiler is practical, reliable and quite simple, the main advantage of which is that it does not depend on electricity. Such boilers are economical, equipped with reliable automation and maintain the set temperature.
In the presence of natural gas, it will be more expedient to give preference to a floor-standing boiler rather than a wall-mounted one. A floor-standing gas boiler is indispensable for a private house, because it is able to provide heating and hot water for large rooms.

A floor-standing boiler with a built-in boiler is excellent for generating a large amount of heat and for maintaining a comfortable room temperature.

Features of boilers with a boiler

With an additional boiler, a chimney must be installed. The chimney for a floor-standing gas boiler should not be narrowed. Floor chimney gas boilers are automatically turned off if the gas suddenly disappears or turns off.

They are also set to turn off automatically in the absence of draft in the chimney.

Such boilers are installed when the power supply is unstable. The chimney for a floor-standing gas boiler is an important element that must be taken into account when installing the boiler.

Some gas boilers require an ordinary chimney, while others require a coaxial one. Therefore, before installing the chimney, you need to carefully read the instructions for the gas boiler. With some boiler models, the chimney is already included in the kit. Ordinary chimneys are led upwards, and the coaxial chimney is led out into the wall, as it is mounted horizontally.

Some experts argue that it is better to purchase boilers that work only for heating the room, without heating the water, considering heating the water by the boiler economically unprofitable. And some, on the contrary, believe that boilers with hot water supply are a profitable investment.

Specifications

Floor-standing ones include steel and cast iron heat exchangers.

The steel heat exchanger is not afraid of impacts and is slightly lighter than the cast iron one. A cast iron heat exchanger is more fragile, there is a risk of microcracking.

The floor-standing gas boiler can be atmospheric or with inflatable burners. The latter are much more expensive and boilers with such burners have higher efficiency. Burners in such boilers can operate on both gas and fuel. Atmospheric burners are simpler and cheaper, they work quieter. Typically, atmospheric burners are supplied with a floor-standing gas boiler, while inflatable burners must be purchased separately.

When buying a floor-standing boiler with a boiler, you should definitely take into account its technical characteristics:

heat load;
power;
the volume of water in the boiler;
Weight, dimensions and manufacturer.

What to consider when choosing a boiler

There are gas boilers with one and two circuits. Their difference is that a double-circuit boiler combines two functions at the same time: heats the room and provides hot water. A single-circuit boiler, respectively, performs only one of these functions - heat supply.

A double-circuit boiler is a more convenient and economical option, since it is used as a heater at home and replaces a column for heating water. You can connect the boiler to both a single-circuit and a double-circuit boiler.

What to look for before choosing a floor-standing gas boiler and what parameters to take into account? The main thing that needs to be foreseen is the conditions for placing the boiler and the power of its operation.

The boiler is connected to the boiler in the event that a large water consumption is foreseen and a large space needs to be heated.

Extends the life of the boiler, improves its operation and perfectly withstands constant temperature changes. The capacity of built-in boilers can be from 40 to 100 liters. When installing the boiler, it is necessary to install cleaning filters that prevent the formation of limescale.

Floor standing gas heating boilers with built-in boiler are used for hot water supply and heating. The heat carrier is industrial water. A floor-standing gas boiler has its own negative and positive characteristics.

Floor gas heating boilers have a long service life and have no power limitations. Such boilers have a fairly high cost of the boiler itself and its equipment.

Floor standing gas boilers with a boiler are a system by which not only heating, but also hot water supply is organized at no extra cost. Almost all modern models of boilers provide for the DHW mode and automatic switching of modes from heating to DHW. Such a boiler is capable of supplying water to a family of up to 6 people and heating large premises.

Differences and advantages of single-circuit and double-circuit boilers

A single-circuit gas boiler is designed exclusively for heating the house - it does not have a built-in water heater that provides residents with hot water. If you connect a boiler to it, it will heat water for various domestic needs.

The mechanism of double-circuit units is more complex and the price for them is higher.

The main advantage of a gas boiler with a built-in storage tank is that you do not have to buy and install additionally. In addition, the water heats up in it much faster than in single-circuit boilers.

For devices with two circuits, you can connect a separate boiler for more hot water. If you already have a single-circuit boiler, then in addition to it, you can buy a special one, which is equipped with a flow-through liquid heater.

If you are the owner of an apartment that is small in area and you need to save space, then a single-circuit boiler with a built-in boiler would be the best option.

In order to avoid all kinds of problems that may arise due to incorrect installation of the equipment, specialists should carry out the installation.

Currently, you can find the following models of double-circuit boilers:

with a flow-through water heat exchanger;
with a built-in boiler for 40-60 liters;
with built-in boiler for 80-599 liters.

The main characteristics of wall-mounted boilers with flowing water:

at the same time they can heat premises, the total area of which is up to 300 m²;
they are compact, you can mount them in a niche in the wall;
acceptable price;
differ in simple installation;
simple and convenient control.

Gas boiler device with built-in boiler

Advantages of gas heating boilers with a 40-60 liter boiler:

can heat an area of up to 300 m² and simultaneously supply water to 4 water points at once;
easy to manage;
have a self-diagnosis system.

Units with a boiler for 80-500 liters are of three types. The first two include devices that include all the necessary parts, they are compact and allow you to fully control the system. The third type includes boilers, for which you need to install additional equipment and buy other parts. As a result, in order to purchase all the missing items, you will have to spend a lot of money.

As already noted, most users prefer single-circuit gas boilers with a free-standing boiler.

Let's note the main advantages of such devices:

Large internal cross-section of the heat exchanger, due to which much less scale is formed.
They are distinguished by their reliability.
The mechanism and principle of operation of the device is simple.
Thermal energy is consumed expediently, as a result of which the efficiency increases, and fuel is consumed more economically.
They are easy to maintain.
With a gas boiler and a boiler, you are guaranteed to be provided with hot water at any time of the day.

Manufacturers

Today, the leading manufacturers of gas boilers with built-in boiler are: Electrolux, Ariston, Viessmann, Baxi, De Dietrich, Vaillant, Wolf, Chaffoteaux, Biasi.

Manufacturer	Model	Characteristic
Electrolux	Electrolux GCB Magnum 28 Fi	Wall gas boiler with 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 24 FF	Wall hung gas boiler with built-in boiler. Power: 24.00 kW. Efficiency: 92.0%. Voltage: 220 V. Combustion chamber: closed. Number of circuits: double-circuit (heating and hot water supply). Heat exchanger: separate.
Ariston	Ariston Clas B Evo 30 FF	Storage tank: 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 supply). Heat exchanger: separate. Overall dimensions (HxWxD): 725x450x360
Baxi	Baxi Nuvola-3 B40 280 i	Designed for heating private houses, cottages, country houses, summer cottages up to 280 m², as well as for organizing hot water supply. Features: boiler for 40 liters; separate heat exchangers; weather-dependent automation; LCD display; push-button control; hydrogroup of brass; advanced functionality; programming.
De Dietrich	De Dietrich MS 24	Wall mounted gas boiler with a 6 liter storage tank. Power: 24.00 kW. Efficiency: 91.0%. Voltage: 220 V. Combustion chamber: open. Number of circuits: single circuit. Heat exchanger: separate. Overall 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.

The desires of every homeowner to provide their home with the necessary sanitary conditions and amenities are quite understandable, without overpaying extra money for this. It does not always make sense to organize a separate DHW system when there are simpler complex 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.

Layout types

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:

Wall hung gas boilers with built-in boiler.
Heating installations with a remote storage tank for hot water.
Boilers for indirect heating.

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, this implies a reasonable use of hot water. In order not to purchase such a heater and not to deal with the laying of unnecessary 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 into the heating system of the house, and the other goes into 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 - heat exchanger of increased productivity; 3 - combustion chamber; 4 - stainless steel storage tank; 5 - control unit with display.

The heater design 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 the mode of maintaining the water temperature, which reduces fuel consumption.

For reference: Suspended boiler VIESSMANN with a power of 12.5 kW with a built-in tank with a capacity of 46 liters can provide a nominal hot water output of about 14 l / min when it is heated from + 10 ° C to + 40 ° C.

More powerful wall-mounted gas boilers are equipped with containers and larger capacity, but usually it does not exceed 100 liters.

Remote storage tank solution

14 liters or one and a half buckets of hot water for one minute is a good indicator, but this is not always enough. The dimensions of suspended heat generators are limited, therefore, large 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 the weight of the structure, together with water, as a result, will become such that not a single wall can withstand it.

Many manufacturers offer floor-standing heating units with a built-in tank, but it also makes no sense to significantly increase their size in order to fit inside a large tank. When you need more performance, you should pay attention to remote vessels for hot water.

A - thermal insulation made of polyurethane foam;
B - connection to the water supply;
C - hot water outlet;
D - heating coil located in the lower part of the vessel;
E - stainless steel vessel;
F - service opening.

Such remote boilers with a capacity of up to 500 liters can be connected to heat generators that provide such an option. That is, to connect a free-standing vessel, the unit must have outlet pipes, and inside it must have a circulation pump serving the DHW circuit. At the same time, the power of a gas boiler needs the corresponding 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 coolant in the system circuits falls to the lower limit, the control unit will direct all the power of the installation to increase this temperature, and then to the DHW circuit. In this situation, you can use the controller's functions by programming the preparation of water at the required temperature for a specific time of the day.

Wiring diagram for indirect heating boiler

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 allow you to always maintain the hot water temperature at a given level.

A - protective magnesium electrode;
B - enamel-coated metal vessel;
C - polyurethane foam insulation;
D - coil-shaped heating element.

In this case, you will have to connect an external boiler for a gas boiler according to the scheme with a circulation pump. One of the leading manufacturers of heating equipment VIESSMANN offers the following scheme for connecting a free-standing tank to the 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; Н - valve - flow regulator; K - a boss for a 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 boiler plant controller.

Conclusion

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 supply at reasonable costs. For this reason, they are gaining more and more popularity with homeowners, overshadowing the flow-through heat exchangers of double-circuit units.

Of the wall-mounted gas boilers offered on the market, only double-circuit boilers provide consumers with hot water without connecting additional devices. The performance of such a hot water supply system often does not suit the owners, therefore wall-mounted gas boilers with a boiler built into the body have appeared on the market. This technical solution made it possible to significantly increase the DHW performance.

In practice, the following options are used:

wall-mounted gas boilers with built-in boiler;
connection of external storage tanks;
installation of indirect heating boilers.

The hot water supply system in double-circuit boilers can be organized in different ways. The circuit can be flowing or accumulative. With intensive extraction, the flow circuit does not have time to heat the water to the required temperature due to low productivity. The storage boiler works much better and if you choose a gas boiler with a built-in boiler with a capacity of about 50 liters, then it will fully meet the water needs of a family of 3-4 people.

Remote storage tank

The possibilities of wall-mounted gas boilers to increase the DHW productivity are limited by the size and capacity of the built-in boiler. According to the classification of gas boilers, a gas boiler with a boiler must have a weight not exceeding 50 kg, however, wall-mounted boilers are produced in which a built-in boiler has a capacity of about 100 liters. This is a limiting value, otherwise the weight and dimensions of the boiler will make it impossible to mount it on the wall.

How to solve the problem if the installed double-circuit gas boiler with a boiler does not provide the necessary needs for hot water?

The solution is simple, you need to install a remote hot water storage tank, which can be up to 500 liters in volume. Almost all wall-mounted gas boilers with a boiler inside are designed for the simultaneous connection of an external storage boiler. The design provides for branch pipes and a circulation pump is installed, which serves only the DHW system. The maximum capacity of an external boiler depends on the capacity of the boiler, because if the capacity is low and the capacity is too high, the temperature will never reach the desired value.

How does a boiler with an external boiler work?

Usually, the automation that controls the operation of a wall-mounted gas boiler is programmed to priority the heating system.

When the temperature of the coolant in the circuit drops, the burner turns on and the wall-mounted gas boiler with a boiler heats the water in the batteries to the required temperature.

After receiving a signal from the water temperature sensor in the circuit, the controller will switch all the power using to the DHW circuit. To maintain the temperature of hot water at a certain level, a gas boiler with an indirect heating boiler is supplied with a built-in heating element, which is connected to the electrical network, and is controlled by the boiler automation controller.

Can the boiler be used for heating?

Undoubtedly, the question of how to make heating from a boiler worries many home owners. This option captivates with its simplicity, but one should also take into account the presence of significant disadvantages of such a heating system. What is needed for a heating circuit? A device that heats a coolant is a boiler for heating a house, which in this case plays the role of a boiler to which pipelines and heating batteries must be connected. Just? Yes, but it is this apparent simplicity and cheapness, as well as the minimum of additional equipment required, that prompts owners to use a boiler for heating. But not everything is so simple.

Difficulties in connecting a boiler for heating:

Kitchen design with gas equipment

Any type of boiler can perfectly fit into the kitchen design if you know the simple rules. The organic design of a kitchen with a gas boiler is a disguise for the existing details.

The following methods are most often used to create an original kitchen interior:

If the camouflage method did not fit, then you can apply a more complex method of fitting the boiler into the kitchen interior. When designing, you need to select or order furniture in which a gas boiler and other household appliances will be hidden. In this case, certain rules and requirements of manufacturers of gas equipment must be observed.

List of requirements for installing a gas boiler:

Today, the best solution, as a result of which a private house is fully provided with hot water in sufficient quantities, is the use of wall-mounted gas boilers with built-in or external storage boilers. Even a single-circuit wall-mounted gas boiler, the price of which is less than with a remote storage tank, will provide a home not only with heating, but also with hot water. The performance of such a switching circuit is much higher than that of a flow-through double-circuit DHW circuit.