Comparison of floor and wall-mounted boilers of imported production
Here you still need to figure out what to compare with what. If we take foreign heat generators of the middle and highest price categories, for example, the well-known companies Buderus (Buderus), Viessmann (Wisman), Baxi (Baxi) and Protherm (Protherm), then their wall-mounted and floor-standing models are practically the same structurally:
- both atmospheric and turbocharged (condensing) series of gas boilers are offered;
- both are equipped with their own circulation pump (usually with a pressure of 4 bar or 40 m of water column) and an expansion tank (usually up to 10 l);
- can be single or double circuit;
- both versions in the extended configuration are equipped with a built-in storage boiler for 45-60 liters;
- can be equipped with programmable controllers with the ability to connect room thermostats and weather-dependent automation.
Proterm boilers in a section: floor-standing “Bear” (left) and wall-mounted “Tiger” (right)
As an example, let’s compare 2 models of the famous Slovak brand “Proterm” - a floor-standing double-circuit gas boiler Bear 20 KLZ and its wall-mounted “brother” Tiger 24 KOZ. In terms of power, they are approximately the same, as well as in terms of configuration. The only difference is in the material of the heat exchanger: the “Bear” has cast iron, while the “Tiger” has steel. The characteristics of the units are presented in the comparative table:
Exploitation
All rules and requirements for the operation of a gas single-circuit boiler are described in detail in the instructions, which must be carefully studied.
Each model differs from others in certain specific features, so it is important to understand in advance all the requirements set forth by the manufacturer. In addition, it is necessary to create conditions for trouble-free operation of the boiler
Experts recommend using a voltage stabilizer, since the electronic control unit is sensitive to the quality of the power supply. If surges occur or the voltage does not match the specified parameters, errors may occur, and sometimes the control unit burns out
In addition, it is necessary to create conditions for trouble-free operation of the boiler. Experts recommend using a voltage stabilizer, since the electronic control unit is sensitive to the quality of the power supply. If surges occur or the voltage does not meet the specified parameters, errors may occur, and sometimes the control unit burns out.
When connecting to the power supply network, it is imperative to make a good grounding, otherwise the self-diagnosis system will begin to give incorrect information and constantly show an error.
Water quality is also an important factor. If the water in the region is too hard, softeners and special filters must be used. Scale in the heat exchanger slows down heat transfer, which means you have to increase the temperature. Excessive heating quickly damages boiler parts, and excessive gas consumption increases the payment amount.
Wall-mounted single-circuit gas boilers are convenient and popular sources of thermal energy in private houses, apartments and other premises. They are reliable, durable, and able to work in difficult conditions. At the same time, the user must ensure all the manufacturer’s requirements in order to keep the unit in order for its entire service life.
The main advantage of a single-circuit boiler is the ability to work in tandem with a storage boiler, which allows you to provide the room with hot water in sufficient quantities. Gas single-circuit wall-mounted boilers are highly rated by their owners and are in high demand.
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Reviews of boilers made in Japan: advantages and disadvantages
Before writing the material, we studied several dozen owner reviews about Japanese boilers, then collected the information into a single visual table.
| Advantages | Flaws |
| High efficiency, often higher than most European boilers | Sometimes (in some regions) there is a problem with the availability of spare parts |
| Compact dimensions even in powerful models | Many are of the opinion that the cost of maintenance and spare parts is high, even though the service is of high quality |
| Owners like to mention the quiet, although not as silent as the German reference models, operation | The problem of condensation forming and freezing in the chimney is more common than with other convection analogues |
| Long service life (on average 8-15 years) due to the use of copper heat exchangers and high-quality alloys. Good build quality | Boiler automation is vulnerable to voltage surges typical of our conditions |
| The optimum ratio of price and quality |
As for silent operation, this applies more to wall-mounted boilers. But the floor-standing ones are not particularly noisy either. The problem with condensation can also be solved by regularly cleaning the chimney from ice or insulating it, and it usually freezes at a temperature of -15°C and below. By the way, condensation forms due to high efficiency. We often encountered it when servicing European models, but less of it is collected there.
It was experimentally determined that, due to higher efficiency, gas savings amount to only a few percent. But it's still an advantage.
Which gas boiler companies are better?
This niche is considered very specific, so some companies specialize only in creating heating equipment. It is best to choose among them - the quality is higher and the prices are lower.
The best gas boiler companies include the following manufacturers:
- Buderus is one of the Bosch brands, only the prices for its products are somewhat lower and more affordable. The company devoted all its efforts to the production of heating equipment for private homes. The range includes mainly models for wall mounting.
- Leberg is a rather middle-aged brand that appeared on the market in 1965. Its products are designed for middle-class consumers; the price range is small - from 20,000 to 30,000 rubles.
- Bosch is the most famous company on the market and has been offering German quality since 1890. The line is dominated by wall-mounted models, both single- and double-circuit.
- Lemax is one of the few Russian manufacturers of gas heating boilers. It has both premium and budget offerings.
- Protherm - by choosing equipment from this brand, you can be sure that there will be no problems with its maintenance due to the large number of service points.
- Baxi is a supplier of modern heating systems, operating since 1925. He was the first among similar companies to receive the ISO9001 quality certificate for such products, and in 2001 his Fr.
The best bimetallic radiators
Timing and solution methods
Typically, clocking is observed during the off-season, when there are no severe frosts and there is no need to warm up the system for a long time.
In this situation, the boiler starts at maximum, quickly heats the water and turns off. Next, the pump removes the coolant throughout the system, the temperature drops, and the burners start up again.
In this mode, both 20kW and 30kW boilers operate. What's the difference?
And the difference is that the first one will consume gas during the launch intervals, conditionally 2m3, and the second 3m3. When the boiler cycles, it does not have time to evaluate anything and reach optimal power.
It starts at maximum and stops at maximum. But all this applies to old, “dumb” models.
In modern wall-mounted appliances with modulating burners (1:10) and smart electronics, the boiler’s operation is designed in such a way that if the automation initially detects overheating of the coolant, the next switching on will occur at a lower power, or you can reduce it yourself.
The only problem is when the minimum power of the boiler is not so minimal.
Therefore, check the instructions and ask the seller whether the gas boiler has a modulation function or not. And the more frequent the adjustment step, the better.
Mistake No. 5 But there is no need to overdo it with the so-called “brains”.
90% of consumers never use weather-dependent automation or GSM modules in their lives. It's not worth overpaying for them.
It’s better to install a couple of smart and inexpensive room thermostats.
Most people solve the age-old problem with clocking in this way.
Rating of the best gas boilers
The list was formed based on user reviews, in which special attention was paid to the frequency of breakdowns, availability of repairs, and equipment efficiency. When compiling the rating, the following points were also taken into account:
When compiling the rating, the following points were also taken into account:
- Thermal power;
- Type;
- Number of circuits;
- Chimney type;
- Installation method;
- Ignition type;
- Dimensions;
- Color;
- Weight.
When compiling the rating, the price of the device and the manufacturer were taken into account.
The best gas boilers for the home according to customer reviews
You will see how to choose a gas boiler for heating in this video:
Double-circuit wall-mounted gas heating boilers
The main purpose of a double-circuit gas heating boiler is to heat the room and provide the house with hot water.
Types of double-circuit gas heating boilers
Wall-mounted gas heating boilers are compact in size and are mounted on the wall. They can even be installed in a closet to match the style of a modern interior.
In the retail chain you can purchase wall-mounted double-circuit gas boilers with:
- boiler (tank volume for heated water from 30 to 60 l). It is possible to install an additional (combined) boiler of a larger size;
- running water supply. On average, a flow-through system provides 10–15 liters of water at a temperature of 30°–35° C.
When choosing a wall-mounted double-circuit gas boiler, you must pay attention to the power (indicated in the device passport), which should be sufficient for heating the premises. Just remember that 1 kW of power is needed to heat an area of 10 m²
Divide the living area of the house by 10 and find out what the power of your wall-mounted double-circuit gas heating boiler should be.
The consumer can also choose the most convenient type of ignition for himself and purchase a gas boiler (wall-mounted double-circuit) with:
- piezo ignition (activated manually);
- electric ignition (starts automatically and is more economical). In the event of a power outage, the gas boiler will automatically resume operation as soon as the power supply problem is resolved.
Double-circuit gas heating boilers with a power of 13 to 55 kW in the wall-mounted version are purchased for residential premises with an area of 50 to 500 m².
Installation of gas heating boilers (wall-mounted double-circuit)
Wall-mounted gas boilers (double-circuit) are a small boiler room consisting of the following elements:
- burner;
- control device (or burner);
- tank (expansion);
- automation (to ensure the safety of the gas boiler);
- pressure gauge, thermometer, etc.
Advantages of double-circuit gas boilers
Wall-mounted double-circuit gas heating boilers, according to consumer reviews, attracted their attention with the following functionality:
- Operability in case of gas fluctuations (significant).
- Smooth power adjustment for models with burners.
- High degree of safety protection.
- Automatic temperature support.
- Availability of a system for switching to propane (liquefied) or butane.
- Possibility of connecting (simultaneous) and heating from 2 to 4 water circuits (independent), including a floor heating system.
- Ease of use and ease of installation.
All these possibilities, which can be considered advantages of double-circuit wall-mounted boilers, as well as their affordable price, largely determine their leading position in sales of devices for heating systems.
Rinnai
Rinnai boilers operate on natural or liquefied gas. The body is made of high-strength steel. All important parts are hidden from the weather using foam filling. All models are equipped with an automatic flame control system.
Units produced by Rinnai are characterized by a high degree of environmental friendliness, because... There is a minimum amount of harmful substances released into the atmosphere.
It is noteworthy that despite the many positive aspects in the operation of the devices of the manufacturer in question, the price of Rinnai products is relatively low.
Gas wall-mounted boiler Rinnai CMF with control panel
| Series | Models | Characteristics |
| EMF | RB-107, 167, 207, 257, 307, 367 | Wall-mounted gas boilers are considered the most economical in terms of resource consumption. They can be connected in a chain, providing heat and hot water in both small apartments and large houses. Rinnai power in space heating mode is 11.6-42 kW with an efficiency of 96%. The area of the serviced space is 30-120 m². Gas consumption – 0.3-1.15 m3/hour, DHW – 12 l/min. The volume of the expansion tank is 8.5 l. If it is necessary to operate on liquefied fuel, the injectors must be changed. The design of the boilers includes a modulating fan-type burner with an automatic resource consumption function proportional to pressure. This feature is aimed at saving gas within 20% and ensures a long service life of the heat exchanger and the control system of the gas double-circuit boiler. As a result of complete combustion, a low level of toxic waste is observed, which prevents deposits of carbon deposits and soot on the injectors. |
| RMF | RB-107, 167, 207, 257, 307, 367 | An improved version of wall-mounted gas double-circuit boilers from the manufacturer Rinnai. With increased functionality, the equipment makes less noise. The remote control is equipped with a color display, voice control mode, and weather-dependent sensors. When heating, you can reduce the power of the device by 20%. To achieve the optimal water temperature, an adjustment unit is used. Thanks to periodic heating, instantaneous supply of hot water is ensured. Operates at a minimum pressure of 2.5 l/min, switches off at a pressure in the pipes of 1.5 l/min. Rinnai gas boilers with a closed combustion chamber have a power of 19-42 kW and heat an area of 190-420 m². The efficiency is 90%, the volume of the expansion tank is 8 liters. The device is equipped with an ECO program (ecological mode). It has two additional sensors: control of frost protection and coolant temperature. |
| GMF | RB-166, 206, 256, 306, 36 | Gas boilers of this series operate on main and liquefied fuel, subject to changing nozzles. The main advantage of this subgroup is its absolute environmental friendliness, which is due to the minimal release of toxic waste into the atmosphere. The automation unit is three-level; adjustment of the burner flame and heating of the coolant is determined depending on the season and climate. Error diagnostics are displayed on the monitor in text and digital code. Adjusting the fan operation prevents a lack of air for purging. The power of a wall-mounted gas boiler is 12-42 kW. Heated area – 120-420 m². The minimum consumption of hot water is 2.7 l/min, centralized resource – 1.1-4.2, liquefied – 1-3.5 m³/hour. The volume of the expansion tank is 8.5 l. Maximum coolant temperature – 85°C, DHW – 60°C. A coaxial chimney is used to remove combustion products. |
| SMF | RB-166, 206, 256, 306, 366 | Gas boilers of this series are designed for heating rooms from 100 to 400 m². They are equipped with two heat exchangers, the first is made of copper, the second is fast-acting and produces up to 14 l/min. In the combustion chamber there is a smooth regulation of the fuel-air mixture, proportional to the volume of gas. This is achieved through a built-in turbocharged burner. Optimal functionality is independent of weather conditions. The release of toxic substances is minimized, which prevents the formation of soot and scale. The boiler power is 18-42 kW with an efficiency of 90%. Minimum water flow – 2.7 l/min. Temperature range for heating – 40-80 °C, for hot water supply – 35-60 °C. The device has an electronically controlled pump. The microprocessor constantly analyzes sensor readings and sends information to operating nodes. Air intake is forced, from the street. |
You can also pay attention to German, Korean, Italian, Czech, Russian and Ukrainian gas boilers.
Thus, Japanese gas boilers are distinguished by high performance and an optimal price-quality ratio.
Prices: summary table
| Model | Number of circuits | power, kWt | Efficiency, % | Gas consumption, cubic meters m/hour | Cost, rub. |
| RB-167 RMF | double-circuit | 18,6 | 85,3 | 2,05 | 56 000 |
| RB-167 EMF | double-circuit | 18,6 | 88,2 | 1,83 | 49 000 |
| RB-207 RMF (BR-R24) | double-circuit | 22,7 | 86,3 | 2,41 | 59 000 |
| BR-UE30 | single-circuit | 29,1 | 91,8 | 2,87 | 65 000 |
| RB-277CMF | double-circuit | 29,7 | 104,6 | 1,84 | 84 000 |
Poll: which Rinnai boiler model did you choose?
TOP 10 rating
Let's consider the most popular models of double-circuit gas boilers, recognized by specialists and ordinary users as the most successful in design and operational terms:
Buderus Logamax U072-24K
Gas double-circuit boiler designed for wall mounting. Equipped with a closed combustion chamber and a separate heat exchanger - the primary one is made of copper, the secondary one is stainless.
Heating area - 200-240 m2. Has several degrees of protection.
Models with the “K” index heat hot water in flow-through mode. It is possible to connect a room temperature controller.
Federica Bugatti 24 Turbo
Representative of Italian heating technology, wall-mounted double-circuit gas boiler. Designed to work in a cottage or public space with an area of up to 240 m2.
Separate heat exchanger - copper primary and steel secondary. The manufacturer provides a 5-year warranty, which indicates confidence in the quality and operational capabilities of the boiler.
Bosch Gaz 6000 W WBN 6000-24 C
The German company Bosch is known all over the world, so it doesn’t need any additional introductions. The Gaz 6000 W series is represented by wall-mounted models designed for use in private homes.
The 24 kW model is the most common; it is optimal for most residential and public premises.
There is multi-stage protection, the copper primary heat exchanger is designed for 15 years of service.
Leberg Flamme 24 ASD
Leberg boilers are usually classified as budget models, although there is no noticeable difference in cost with products from other companies.
The Flamme 24 ASD model has a power of 20 kW, which is optimal for houses with an area of 200 m2. A special feature of this boiler is its high efficiency - 96.1%, which is noticeably superior to alternative options.
It runs on natural gas, but can be converted to liquefied gas (replacement of burner nozzles is required).
Lemax PRIME-V32
A wall-mounted double-circuit boiler, the power of which allows you to heat 300 m2 of area. This is suitable for two-story cottages, shops, public or office premises.
Produced in Taganrog, the basic technological principles of assembly were developed by German engineers. The boiler is equipped with a copper heat exchanger that ensures high heat transfer.
Designed for operation in difficult technical conditions.
Navien DELUXE 24K
Korean boiler, the brainchild of the famous company Navien. It belongs to the budget group of equipment, although it demonstrates high performance qualities.
Equipped with all the necessary functions, has a self-diagnosis system and frost protection. The boiler power is designed to operate in houses up to 240 m2 with ceiling heights up to 2.7 m.
Installation method: wall-mounted, there is a separate heat exchanger made of stainless steel.
MORA-TOP Meteor PK24KT
Czech double-circuit gas boiler designed for wall-mounted installation. Designed for heating 220 m2. It has several degrees of protection, blocking in the absence of liquid movement.
It is possible to additionally connect an external water heater, which significantly expands the possibilities of DHW supply.
Adapted to unstable power supply voltage (the range of permissible fluctuations is 155-250 V).
Lemax PRIME-V20
Another representative of domestic heating engineering. Wall-mounted double-circuit gas boiler, designed to serve 200 m2.
A modulating burner allows you to distribute fuel more economically by changing the gas combustion mode depending on the intensity of coolant circulation. It has a separate stainless heat exchanger and can be connected to a room thermostat.
There is a possibility of remote control.
Kentatsu Nobby Smart 24–2CS
Japanese wall-mounted gas boiler providing heating of 240 m2 and hot water supply. Model 2CS is equipped with a separate heat exchanger (primary copper, secondary stainless).
The main type of fuel is natural gas, but when changing jets it can be switched to using liquefied gas. Most of the performance characteristics correspond to European boilers of similar power and functionality.
It is possible to use several design options for the chimney.
Oasis RT-20
Wall-mounted double-circuit gas boiler made in Russia. Designed to work in rooms of about 200 m2. Equipped with an efficient copper heat exchanger and a stainless secondary unit.
The combustion chamber is turbocharged, there is a built-in expansion tank and a condensate drain.
With an optimal set of functions and high build quality, the model has a relatively low price, which ensures its relevance and popularity.
Design Features
The main feature of Rinai boilers is their technical capabilities. Japanese technology is designed to replace humans in matters of control and adjustment - everything is done by automation. The air-gas mixture supplied to the burner is controlled by devices - they monitor its composition and concentration so that the combustion effect is maximum. As a result, productivity and efficiency increase, and gas consumption decreases.
The operating mode is selected automatically, depending on the gas pressure in the pipes. What can we hide - gas suppliers often suffer from uneven pressure in gas pipelines. This is especially true in winter. Using automation, the Japanese were able to eliminate the problem of pressure drops - regardless of its value, the device works, saves gas and creates a comfortable temperature in the house.
