Creating an ideal microclimate and maximum comfort in the house is the main task that is solved when installing a heating system. Agree that it will not be superfluous to find out what set of characteristics atmospheric gas boilers should have in order to choose the model that is right for you.
There are many units on the market with different technical data and functional features. We will help you understand all the intricacies and understand which technological capabilities are the most important and which can be neglected. And you can easily choose a model that will last for many years.
The article presented by us analyzes in detail and explains what kind of device it is - an atmospheric gas boiler, on what its principle of operation and installation specifics are based. And the rating compiled by us will help to determine the most optimal option and purchase a sufficiently powerful model with high reliability at an affordable price.
The content of the article:
-
Rating of the best atmospheric gas boilers
- Single-circuit gas boilers
- Double-circuit gas boilers
- The principle of operation of an atmospheric boiler
- Single-circuit and double-circuit devices - what's the difference?
- Differences between floor-standing and wall-mounted boilers
-
The main criteria for choosing a boiler
- Heating unit power
- Heat exchanger material
- Automation and safety
- Conclusions and useful video on the topic
Rating of the best atmospheric gas boilers
A place
Product
Rating
Power, kWt)
Efficiency (%)
Country of Origin
Price
Single-circuit gas boilers
#1
99
/ 100
22.1
90.2
Italy
#2
98
/ 100
32
91,6
Italy
#3
96
/ 100
23
90.3
France
#4
95
/ 100
27.8
91
Germany
#5
94
/ 100
25
90
Ukraine
#6
93
/ 100
30
92
Russia
#7
91
/ 100
26
92
Slovakia
#8
90
/ 100
24
90,2
Italy
Double-circuit gas boilers
#1
98
/ 100
22.1
90,2
Italy
#2
97
/ 100
19.8
90
South Korea
#3
96
/ 100
40
91,4
South Korea
#4
95
/ 100
24
91
Slovakia
#5
93
/ 100
30,2
93,7
Italy
#6
91
/ 100
30
90
Ukraine
#7
89
/ 100
20
90
Russia
1
Baxi Slim 1.230 iN
2
Ferroli Pegasus D 32
3
De Dietrich DTG X 23 N
4
Vaillant atmoTEC plus VU 280 / 5-5
5
ATON Atmo 25Е
6
Bosch GAZ 2500 F 30
7
Protherm Bear 30 KLOM
8
Ariston UNOBLOC GPV 24 RI
Double-circuit gas boilers1
Baxi Slim 2.230 i
2
Kiturami STSG-17
3
Navien GST-40 KN
4
Vaillant atmoTEC pro VUW 240 / 5-3
5
Ferroli PEGASUS D 30 K 130
6
Aton Atmo 30 U
7
Lemax Premium-20B
Single-circuit gas boilers
#1
Baxi Slim 1.230 iN
Compact condensing boiler that is easy to install in the most confined spaces
Expert rating:
99
/ 100
The stylish design fits perfectly into any interior. In the form of fuel, not only natural but also liquefied gas can be used.
Good heat transfer and increased strength are ensured by installing a sectional cast iron heat exchanger. The burner made of high quality stainless steel guarantees a long service life and reliable operation. The Baxi Slim 1.230 iN has two temperature modes that allow you to adjust the heating temperature and the temperature of the underfloor heating system.
Specifications:
- Power - 22 kW;
- Room area - 230 m²;
- Efficiency - 90.2%;
- Installation option - floor-standing;
- Weight - 103 kg;
- Dimensions - 850 × 350 × 600 mm.
By connecting the remote control adapter, it is possible to adjust the temperature at a convenient time for the owners, while the built-in protection thermostat will prevent overheating of the water for heat exchanger.
Dignity
- Smooth electric ignition
- Electronic flame modulation
- Technological system of autodiagnostics
- Anti-jamming pump
- Frost protection
disadvantages
- Sensitivity to voltage surges
- Unreliable turbine
- Heavy weight
#2
Ferroli Pegasus D 32
Excellent boiler with advanced temperature control technology
Expert rating:
98
/ 100
The boiler is controlled by a microprocessor with a digital interface. Economical fuel consumption and high efficiency are ensured by a heat exchanger made of cast iron stacked sections with an ideal distribution of fins.
The ease of monitoring and control of the operation of Ferroli Pegasus D 32 is due to the user-friendly interface, all the necessary information is displayed on the LCD display. When installing a cascade controller, it is possible to arrange cascade systems.
Specifications:
- Power - 13-32 kW;
- Room area - 250 m²;
- Efficiency - 91.7%;
- Installation option - floor-standing;
- Weight - 136 kg;
- Dimensions - 850 × 500 × 615 mm.
A compact boiler that can be easily built into a niche or kitchen. The geometry of the smoke ducts and fireboxes guarantee virtually silent operation. Safety control is ensured by a shut-off valve equipped with two thermostats.
Dignity
- Simple user interface
- Combustion control system
- Injection burner
- Economical fuel consumption
- Frost protection
- Self-diagnosis
disadvantages
- No mechanical control system
- Condensate protection of the heat exchanger is not provided
#3
De Dietrich DTG X 23 N
Reliable and durable boiler with low emission atmospheric burner
Expert rating:
96
/ 100
The low-temperature floor-standing boiler is adapted for operation on natural gas, but with minor modifications it can also operate on propane. The model is equipped with a simple electromechanical control panel with a choice of operating modes.
The De Dietrich DTG X 23 N boiler has a high degree of safety, thanks to a special draft sensor that prevents the penetration of flue gases when it is stopped.
Specifications:
- Power - 23 kW;
- Room area - 230 m²;
- Efficiency - 90%;
- Installation option - floor-standing;
- Weight - 95 kg;
- Dimensions - 850 × 452 × 707 mm.
The boiler is easy to install, maintain and operate. If necessary, you can install a storage boiler and connect a special weather-dependent automation.
Dignity
- Ease of controls
- Reinforced thermal insulation
- Possibility of low temperature heating
- Electric ignition
- Service hatch
- Flame control viewing window
disadvantages
- Minimum number of operating modes
- High price
#4
Vaillant atmoTEC plus VU 280 / 5-5
High quality boiler that works flawlessly at low water and gas pressure
Expert rating:
95
/ 100
Great model for a reasonable price. The presence of a minimum side gap of 2 cm allows easy installation of a wall-mounted single-circuit atmospheric gas boiler as close to the wall as possible, operation in a residential area is possible.
The Vaillant atmoTEC plus VU 280 / 5-5 model has a high degree of safety, which is provided by protection against flame extinction, boiling of water, lack of draft, pressure drop in the system. The copper heat exchanger quickly heats the water, while the bronze hydraulic elements guarantee a long service life.
Specifications:
- Power - 28 kW;
- Room area - 230 m²;
- Efficiency - 91%;
- Installation option - wall-mounted;
- Weight - 95 kg;
- Dimensions - 800 × 440 × 338 mm.
The modern and stylish design of the wall-mounted boiler allows it to fit into the interior of any room. The intuitive control interface with display of the operating mode and temperature makes it easy to control the operation of the device.
Dignity
- High security
- Quiet operation
- Automatic self-diagnosis system
- Integrated bus eBus
- Operation at partial power possible
- Convenient connection
disadvantages
- Sensitivity to voltage surges
- Incorrect operation during emergency shutdown
#5
ATON Atmo 25Е
Excellent gas boiler with high efficiency at an affordable price
Expert rating:
94
/ 100
Quite a simple, but quite reliable model that attracts with its low price. Low hydraulic resistance of the equipment ensures operation without a circulation pump, providing complete energy independence of the unit.
The ATON Atmo 25E gas boiler is equipped with protection against coolant overheating, gas pressure drop, lack of draft, flame extinguishing. Designed for installation in non-residential premises.
Specifications:
- Power - 25 kW;
- Room area - 200 m²;
- Efficiency - 90%;
- Installation option - floor-standing;
- Weight - 94 kg;
- Dimensions - 950 × 384 × 615 mm.
Simple mechanical control of the boiler operation with the possibility of manual power control guarantee its stable and reliable operation.
Dignity
- Reliable EUROSIT automation
- Simple controls
- Manual power adjustment
- Low noise level
- Low flame burner
- Rear chimney
disadvantages
- Problems with piezoelectric ignition after fading
- Steel heat exchanger is sensitive to corrosion
#6
Bosch GAZ 2500 F 30
An efficient and reliable boiler from a manufacturer whose name has been tested by time
Expert rating:
93
/ 100
A model that will not leave your home without heat, even with power surges and a critical drop in pressure in the gas main. The large volume of the heat exchanger allows the heat to be retained longer, which significantly extends the life of the burner by reducing the frequency of its activation.
Efficient and economical operation of the Bosch GAZ 2500 F 30 boiler is ensured by the burner modulation range from 60 to 100%. The unit is monitored using a large LCD display.
Specifications:
- Power - 30 kW;
- Room area - 300 m²;
- Efficiency - 92%;
- Installation option - floor-standing;
- Weight - 137 kg;
- Dimensions - 1092 × 589 × 877 mm.
The boiler is very easy to operate, there is a wide range of functions already in the basic configuration, which can be significantly expanded after additional installation of room regulators.
This will allow you to work not only in weather-dependent mode, but also to use the weekly setting mode, adjusting the room temperature throughout the day in automatic mode.
Dignity
- Modern automation
- Large heat exchanger volume
- Burner modulation range
- Stable operation with decreasing gas pressure
- Resistant to voltage surges
- Thermal disinfection
- Preventing condensation
disadvantages
- Heavy weight
- Volatility
#7
Protherm Bear 30 KLOM
Unique boiler with the realized possibility of forced discharge of gases
Expert rating:
91
/ 100
A solid and comfortable boiler, equipped with an ideal control system that allows smooth power regulation. All the advantages of the model are manifested when installing a weather-dependent automation and a thermostat.
A two-way cast iron heat exchanger allows safe operation of the boiler, both on natural gas and on liquefied gas, even in difficult hydraulic conditions.
Specifications:
- Power - 26 kW;
- Room area - 265 m²;
- Efficiency - 92%;
- Installation option - floor-standing;
- Weight - 110 kg;
- Dimensions - 880 × 420 × 600 mm.
The gas boiler Protherm Bear 30 KLOM is ideal for modernizing existing heating systems. The simplicity of the installation work is due to the possibility of adjusting the boiler in height, and when installing the turbo pump, a chimney-free operation is realized.
Dignity
- Condensate protection of the heat exchanger
- Forced draft device provided
- overheat protection
- Traction control
- Stainless steel burner
- Electric ignition and flame control system
disadvantages
- Low body strength
- Often gives incorrect error codes
#8
Ariston UNOBLOC GPV 24 RI
Reliable and high performance boiler with cast iron heat exchanger
Expert rating:
90
/ 100
Stylish design and compact dimensions are the main external indicators of this model. The unit has been adapted to the conditions of the domestic market and can operate under conditions of reduced gas pressure without loss of power. It is possible to connect to a cascade.
The cast iron boiler heat exchanger is resistant to thermal stress and corrosion. Additional thermal insulation on the housing minimizes heat loss and prolongs burner life.
Specifications:
- Power - 24 kW;
- Room area - 240 m²;
- Efficiency - 90.2%;
- Installation option - floor-standing;
- Weight - 108 kg;
- Dimensions - 850 × 450 × 675 mm.
The Ariston UNOBLOC GPV 24 RI boiler is equipped with a simple and reliable mechanical control system. It features a high degree of protection and requires minimal control.
Summing up, we can say that in each of the presented models of single-circuit boilers there is the possibility of connecting an external boiler for organizing hot water supply.
Dignity
- Minimum pressure switch
- Built-in traction tipper
- Ionization flame control
- Additional heat exchanger insulation
- Electronic ignition
- Simple controls
disadvantages
- Lack of condensation protection
- Lack of remote control capability
Double-circuit gas boilers
#1
Baxi Slim 2.230 i
Excellent and reliable boiler with a perfect self-diagnosis system
Expert rating:
98
/ 100
The unit is distinguished by its reliability and increased service life, as it is made of durable materials. The heater is equipped with smooth electronic ignition and continuous electronic flame modulation, which ensures economical fuel consumption.
Two temperature modes allow operating the boiler for heating and providing a system of underfloor heating. Three modes of the temperature regulator in the boiler make it possible to obtain water at the outlet within the range of 5 - 65 degrees.
Specifications:
- Power - 24.5 kW;
- Efficiency - 90.2%;
- Productivity at t-35 ° - 9 l / min;
- Boiler volume - 50 l;
- Installation option - floor-standing;
- Weight - 176kg;
- Dimensions - 850 × 600 × 650 mm.
The Baxi Slim 2.230 i boiler is adapted to the operating conditions in the event of a decrease in gas pressure. Differs in safety and high degree of protection.
Dignity
- Self-diagnosis system
- Safety valve in the heating circuit
- Ionization flame control
- Heat carrier overheating protection
- Continuous electronic power modulation
- Traction sensor
- High speed circulation pump
disadvantages
- Poor connection between the expansion tank and the fitting
- Incorrect work of the board
- Microexplosions of gas when turned on
#2
Kiturami STSG-17
Compact and easy-to-use boiler with excellent technical parameters
Expert rating:
97
/ 100
The floor-standing gas boiler is not subject to corrosion, as it is made of stainless steel. Provides a sufficient volume of hot water for domestic use, and a heat exchanger with a special coil device prevents boiling.
The use of turbolizers ensures complete combustion of the fuel, which is the reason for the high efficiency of the model. Fuel combustion control and temperature control functions guarantee high operational safety.
In the absence of draft, a drop in pressure or overheating of the heat exchanger, the gas supply is automatically turned off.
Specifications:
- Power - 19.8 kW;
- Efficiency - 90%;
- Productivity at t-40 ° - 7.1 l / min;
- Installation option - floor-standing;
- Weight - 30 kg;
- Dimensions - 741 × 602 × 325 mm.
The programming of operating modes and control of their implementation is carried out using the remote control, all the necessary information is displayed on the display. There is a self-diagnosis function with an error code.
Dignity
- Remote control
- Energy saving function
- Gas leak detection system
- Self-diagnosis function
- Delayed start
- Frost protection
- Room thermostat
- Turbo cyclone burner
disadvantages
- Fuel filter needs frequent cleaning
- Often gives an error about the state of the chimney
#3
Navien GST-40 KN
The most powerful model in the Navien GST boiler line
Expert rating:
96
/ 100
A floor-standing boiler with built-in weather-dependent automation easily creates a comfortable temperature in the room. The model is distinguished by high productivity and speed of water heating. The impressive power makes it possible to heat a large area and receive hot water in sufficient volume.
The stainless steel heat exchanger does not corrode. Thanks to the fan of the inflatable burner, an additional head is provided, which increases the thrust. Control is carried out from the remote control, there is a voice assistant.
Specifications:
- Power - 40 kW;
- Efficiency - 91.4%;
- Productivity at t-40 ° - 14.6 l / min;
- Installation option - floor-standing;
- Weight - 68 kg;
- Dimensions - 904 × 402 × 691 mm.
Due to the presence of separate heat exchangers, it is ideal for operation in rural areas, when water comes from a well and a well, and has a high hardness.
Dignity
- Remote control
- Return line sensor
- Separate heat exchangers
- Resistant to voltage surges
- Frost protection
- Overheating fuse
- Low water block
disadvantages
- Volatility
- Launch problems
- Original spare parts for repair
#4
Vaillant atmoTEC pro VUW 240 / 5-3
Compact inexpensive wall-hung boiler with excellent technical parameters
Expert rating:
95
/ 100
The wall-mounted double-circuit boiler attracts with its conservative appearance and small dimensions inherent in the brand. This allows it to fit perfectly into the interior of the room. The model has proven itself to work well with a critical drop in gas and water pressure.
The unit is distinguished by solid performance and a high degree of protection. The model is adapted for use in the residential area of the premises. The reliable chrome-nickel alloy burner is durable, and the flame modulation ensures economical fuel consumption.
Specifications:
- Power - 9-24 kW;
- Efficiency - 91.4%;
- Productivity at t-30 ° - 11.5 l / min;
- Installation option - wall-mounted;
- Weight - 35 kg;
- Dimensions - 800 × 338 × 440 mm.
The boiler has integrated software, with the help of which the setting of parameters is controlled and diagnostics of their implementation is carried out. In the event of a malfunction, a self-diagnosis system of malfunctions is installed with an error code displayed on the display.
Dignity
- Separate heat exchangers
- Power adjustment
- Multistage circulation pump
- Resistant to voltage surges
- Electronic ignition
- Anti-jamming pump
- Built-in E-bus module
disadvantages
- Sensitive to voltage surges
- Volatility
- Lack of overheating protection
#5
Ferroli PEGASUS D 30 K 130
Solid model, distinguished by reliability and high functionality
Expert rating:
93
/ 100
Injection burner with high quality stainless steel and classic cast iron heads heat exchanger with optimal distribution of fins ensures long service life, economical fuel consumption.
Simple, intuitive control of the boiler is carried out from the control panel. All information about the status of the programs is displayed on the LCD. It is possible to connect a remote control.
Specifications:
- Power - 30.2 kW;
- Efficiency - 93.7%;
- Productivity at t-30 ° - 25.0 l / min;
- Installation option - floor-standing;
- Weight - 250 kg;
- Boiler volume - 130 l;
- Dimensions - 1350 × 500 × 950 mm.
The model can be considered ideal in terms of water supply organization. The boiler has a built-in stainless steel boiler with a volume of 130 liters. The DHW circuit is equipped with a separate circulation pump.
Dignity
- Operation on natural and LPG
- Injection burner
- Two circulation pumps
- Electronic ignition
- Built-in boiler
- Closed expansion tank
disadvantages
- Heavy weight
- Volatility
- High price
#6
Aton Atmo 30 U
High-quality and inexpensive model with a minimum set of functions
Expert rating:
91
/ 100
A simple and reliable model attracts with an affordable price, good technical characteristics and capabilities. It is intended for installation in non-residential premises in heating systems with natural circulation of the coolant.
The model is non-volatile, ideal for organizing heating and hot water supply. Operational safety and a high level of reliability are ensured by Honeywe or EUROSIT gas automatics.
Specifications:
- Power - 30 kW;
- Efficiency - 90%;
- Productivity at t-35 ° - 6.6 l / min;
- Installation option - floor-standing;
- Weight - 125 kg;
- Dimensions - 1020 × 435 × 600 mm.
Inexpensive model, easy to operate and reliable. Ideal for a quick and budget solution of issues related to replacing an old boiler in order to reduce fuel consumption.
Dignity
- Parallel operation possible
- Does not require power supply
- Low-flame slot burner
- Anti-corrosion surface treatment
- Ease of service
- High security
disadvantages
- Wind attenuation
- Poor build quality
- Unstable operation of piezo ignition
#7
Lemax Premium-20B
Modern analogue to expensive imported boilers with a high level of protection
Expert rating:
89
/ 100
Improved and modified model of a double-circuit floor boiler with simple mechanical control. The high degree of protection of the heat exchanger ensures long-term operation of the equipment. The boiler is installed in non-residential premises in natural circulation heating systems.
Despite the minimal set of functions and simple mechanical control, the boiler is characterized by a high degree of protection. Removable cladding parts ensure ease of maintenance.
Specifications:
- Power - 20 kW;
- Efficiency - 90%;
- Productivity at t-30 ° - 6 l / min;
- Installation option - floor-standing;
- Weight - 83 kg;
- Dimensions - 961 × 470 × 556 mm.
The Lemax Premium-20B boiler is non-volatile, ideal for areas where there are problems with power grids. There is a removable top panel which makes it easy to clean the boiler.
Dignity
- Injection low-flame burner
- Overheating and attenuation protection
- Increased air flow
- Mechanical control
- Energy independence
disadvantages
- Low quality automation
- Flame extinction
- Frequent breakdowns
Among the models presented there are boilers that differ in the way of installation - mounted and floor units. Also, boilers are divided into two segments: single-circuit - designed only for heating and double-circuit - in addition to heating, they are responsible for organizing hot water supply.
The cost of the boiler is not the most important quality criterion, so we will pay attention to the technical features of each model, highlighting the most important from their set. To make it easier to understand, first let's figure out what a boiler with an atmospheric burner is and what its features are.
The principle of operation of an atmospheric boiler
Usually atmospheric gas boilers are used for heating a private house or for individual heating of an apartment. The average power of the units is in the range of 15-40 kW. This figure is considered sufficient for heating a room with an area of up to 400 sq. M.
The atmospheric burner is the main heating device, it consists of the following parts:
- Nozzle;
- Burner head;
- Ejection tube with burner holes;
- Burner;
- Flame control sensor.
Atmospheric burners are of the following types:
- One-stage - work in the "on" and "off" modes.
- Two-stage - capable of operating in reduced or full power mode;
- With flame modulation function - provide optimal gas supply mode.
To make it easier to understand the principle of operation of an atmospheric boiler, imagine that a heat exchanger is installed above a lighted gas stove, and a ventilation duct is located above.
The boiler, into which air enters, works in a similar way, the combustion products are removed under the action of natural draft. The presence of a chimney is the main condition for the installation and operation of the "atmospheric".
The main purpose of an open gas burner is to premix the gas with air and then feed the resulting mixture directly into the combustion zone.
Atmospheric gas burner provides mixing of gas with air with subsequent supply of the mixture to the combustion zone
The efficiency of work is due to the intensification of the flame due to the supply of oxygen and a decrease in fuel consumption.
Single-circuit and double-circuit devices - what's the difference?
A single-circuit heating device differs from a double-circuit only in that it is only responsible for heating the room. At the same time, the double-circuit boiler, in addition to heating, is also called upon to solve the issues of providing hot water supply.
Owners of single-circuit boilers solve DHW problems by installing additional equipment. Most often it is an indirect water heating boiler connected to the boiler. What is more efficient than a single-circuit boiler or a double-circuit one? In this we will figure it out now.
The main advantage of a single-circuit boiler in conjunction with a storage heater is that the water is heated to a comfortable temperature without cooling the dwelling. While with significant water consumption in double-circuit boiler in automatic mode, the circuit responsible for heating is turned off, and the unit works only to heat water.
A single-circuit gas boiler with an indirect heating boiler completely solves the issue of hot water supply without disrupting the operation of the heating system
Before choosing a heater configuration, consider the following factors:
- Heated housing area;
- Number of points of water intake;
- Distance from water intake points to the boiler;
- Number of residents.
In a house with a small heated area with economical consumption of hot water and close location of water intake points, the optimal solution would be to install a double-circuit boiler.
With the simultaneous consumption of hot water from several points of water intake, the water temperature may be lower than required. In addition, with a large area of housing, additional inconveniences arise. In double-circuit boilers, the priority is DHW; when hot water is consumed, the circuit responsible for heating is turned off.
But even these issues have been resolved at the level of the unit design. There are double-circuit boilers that heat water in continuous flow mode and are equipped with a built-in boiler.
The latter provide a supply of hot water at the level of 30-60 liters, but at the same time the gas consumption increases slightly. In addition, the weight of the boiler and its overall dimensions increase significantly.
Floor standing gas boiler with built-in indirect heating boiler ensures sufficient supply of hot water
It can be concluded that when meeting the needs, the optimal solution would be installation of a double-circuit boiler flow-through type. If you want to have a sufficient supply of hot water at a comfortable temperature at any time without cooling the dwelling, then it would be preferable to install a bundle of a single-circuit boiler with an indirect heater.
In addition, if it is necessary to increase the demand for hot water, boiler can always be replaced with a larger boiler. As a result, the price of such a bundle will be higher than the cost of a double-circuit boiler, but the issue of hot water supply and heating will be reliably resolved.
Differences between floor-standing and wall-mounted boilers
Typically, a wall-mounted single or double-circuit atmospheric gas boiler is a kind of mini-boiler room with built-in expansion tank, circulation pump, electronic board management. Variants of equipping with a valve for connecting an indirect heating heater and weather-dependent programmers are possible.
Main advantage wall-mounted boiler - this is its compactness, low weight, high functionality, ease of installation. Such a unit is ideal for installation in cramped conditions, operation in a residential area is allowed. Modern hinged boilers have enough power to heat a house with an area of up to 200 sq. M.
A compact wall-mounted gas boiler fits perfectly into a modern room interior
Floor standing boilers have large overall dimensions, and their weight can be 3 times higher than the weight of a wall-mounted boiler with similar parameters. This is due to the fact that floor-standing units, unlike wall-mounted ones, are equipped with cast-iron heat exchangers.
The service life of such boilers is 20-25 years. At the same time, wall-mounted boilers with steel or copper heat exchangers will serve you 8-10 years.
The main criteria for choosing a boiler
When choosing a boiler with an atmospheric gas burner, it is necessary to pay attention to the following main characteristics:
- Power;
- Number of contours;
- Installation method - floor or wall-mounted;
- The material from which the heat exchanger is made;
- Automation and safety
Let's dwell on each of the criteria in more detail, and consider all the main points related to the given technical characteristics, with the exception of those that have already been discussed above.
Heating unit power
The quality of the heating operation and the creation of a comfortable temperature in the room largely depend on the power of the boiler.
At calculating the power of the boiler you need to take into account:
- Room area;
- Room volume;
- Coefficient of thermal conductivity of walls, windows and doors.
In order not to dive deeply into numbers and calculations, you can take a different, simpler path. It is generally accepted that for heating 10 square meters of housing, 1 kW of boiler power is enough for standard ceilings with a height of 2.5 m and room insulation. Thus, it is enough to divide the area of the room by 10, and we get the theoretically required boiler power.
The resulting figure must be increased by 20% in order to ensure the normal operation of the boiler during peak loads. To obtain a sufficient volume of hot water, which is especially important for instantaneous double-circuit boilers, the power must be increased by 25%.
Heat exchanger material
The main materials from which the heat exchanger of the atmospheric boiler is made are cast iron, steel, stainless steel and copper. The cast iron heat exchanger has almost no power limitations. It is distinguished by its reliability and durability due to its excellent anti-corrosion properties.
But here, too, there are some peculiarities - cast iron can crack due to the temperature difference at the point of water entry and the heating zone. Design solutions provide for the prevention of low temperature corrosion by installing a four-way valve.
Cast iron heat exchangers are installed in floor standing boilers. Products are distinguished by their large dimensions and weight.
The cast iron heat exchanger has no restrictions on the boiler power, it is the most reliable and durable
Steel heat exchangers are used by domestic boiler manufacturers due to their low cost. Such heat exchangers are not demanding in terms of installation, they resist thermal loads well, but at the same time they are significantly inferior to cast iron heat exchangers due to their low resistance to corrosion.
A good alternative to steel is a stainless steel heat exchanger. It combines all the positive qualities of steel and cast iron - it is durable, immune to thermal shock, and has high corrosion resistance. But at the same time, boilers with stainless steel heat exchangers are distinguished by a higher cost.
Copper is plastic and conducts heat well. The heat exchangers made of it have many fins and are characterized by a small volume, due to which it is possible to achieve a reduction in the size and weight of the boiler.
Copper heat exchangers are used in wall-hung boilers, provide quick heating, which reduces fuel consumption. Due to the compactness and small amount of water, a circulation pump is needed to avoid boiling.
Automation and safety
Automation ensures the safety of the boiler, economical fuel consumption, and improves the level of comfort during the operation of the equipment. Price automatics for gas boiler determined by the number and complexity of programs and functions.
Some of them are considered basic and should be present in any gas boiler. They are responsible for preventing gas leakage as a result of various non-standard situations - flame damping, gas pressure drop.
There are two types of automation - volatile and non-volatile. The first is considered the most reliable, but requires an electrical connection and an uninterruptible power supply. The second is considered mechanical, it is simpler and autonomous.
Non-volatile automation system
It is characterized by autonomy, high maintainability and low price. The temperature range of the thermostat is selected manually using a thermostat, which has a rod in its design that lengthens or shortens depending on the temperature. As a result, the gas supply valve opens and closes.
Non-volatile automation is easy to operate, ensures the operation of basic security systems
The basic set of automation includes traction and flame sensors. When the thrust decreases or the burner decays, the gas supply is shut off. Although non-volatile automation is considered simple and reliable, it does not make it possible to operate the boiler in optimal conditions, which reduces the service life of the equipment.
Volatile device variant
Operating parameters or operating modes are entered on the display or from the remote control, after which the control and regulation systems are started.
Volatile automation extends the service life of the equipment, and opens up opportunities for a wide range of comfort control functionality
Its principle of operation is based on the operation of solenoid valves, which are controlled by a microprocessor unit.
The main functions of modern automation:
- Maintaining temperature for a certain time;
- Adjustment of the thermal regime depending on the weather;
- Electronic flame modulation;
- Heat exchanger protection against overheating;
- System frost protection;
- Protection against seizure of the circulation pump;
- Self-diagnosis.
The disadvantage of the system is its volatility; in the absence of electricity, the equipment is blocked. To ensure full operation, it is required to connect the automation to an uninterruptible power supply.
Conclusions and useful video on the topic
Recommendations for connecting a gas boiler to a chimney:
Single-circuit boiler or double-circuit, which is preferable:
It is almost impossible to give a definite answer about the optimal boiler configuration. Since the unit must not only correspond to the size of the room, but also to the requirements put forward for it. Based on the most important criteria for choosing a device, you can make a certain prototype of the ideal boiler, with which it will be easier to choose a specific model.
With similar technical parameters, preference should be given to the model that is higher in the presented TOP-15 of the best gas boilers. Since the rating is based not only on the brand awareness, but also on the popularity of the product in the modern market. It was compiled taking into account in-depth market analysis and user feedback.
Do you want to talk about how you chose and installed an atmospheric gas unit in your own heating system? Do you have any useful information on the topic of the article? Please leave comments, ask questions, post photos in the block form below.
