12 best gas boilers

There are several ways to organize the heating system in an apartment and a house. And when choosing a good gas boiler for their home, buyers prefer a reliable heating method with high efficiency. But a wide variety of modern models can confuse an inexperienced user. In this article, we decided not only to consider the TOP of the best gas boilers, but also to give recommendations that will help you find the right device for the individual needs and budget of our readers. And in the list we have compiled, you can find good options for both residential buildings and various enterprises where the arrangement of a heating system is required.

Gas boiler which company to choose

• Bosch... A German company offering premium quality products. In terms of reliability and efficiency, Bosch boilers are practically unmatched. But the cost of units from this manufacturer is not too democratic.
• BAXI... And if price is not the last criterion for you when choosing a product, then we recommend the BAXI trademark. It offers the best in price and quality boilers on the Russian market, practically not inferior to their German counterparts.
• Navien... The company is gradually gaining popularity among domestic consumers. If you cannot decide which boiler is still the best for heating a private house that suits your requirements and budget, then take a closer look at the Korean brand Navien.
• Kiturami... Of course, in any segment of the modern market, Asian manufacturers cannot do without. But we will not dwell on the Chinese, but rather note a worthy nonsense from South Korea, which offers reliable boilers.
• Lemax... And we will complete the list with a domestic brand from Taganrog. The company began work in July 1992, and Lemax's boiler production appeared in 2003. Today the Russian company is one of the most successful in its home market.

The best single-circuit gas boilers

Single-circuit models are simpler and cheaper than their counterparts with two circuits. The design of such devices is simpler, which not only makes maintenance easier, but also generally makes them more durable. The combination of single-circuit devices with a boiler allows you to receive hot water immediately after opening the tap. The heat exchanger of the considered type of boilers has a single design. But single-circuit boilers have disadvantages. So, taking into account additional devices, they will take up more space. And the purchase of all the necessary components of the system can significantly increase the installation costs.

1. Protherm Wolf 16 KSO 16 kW single-circuit

The first in the list of the best gas units is the Wolf 16 KSO boiler from Protherm. This model is intended for systems with natural circulation of the heat carrier.In addition to a 16 kW device, the manufacturer offers a solution for 12.5 kW. Wolf 16 KSO is suitable for use in residential and non-residential premises up to 160 square meters. The built-in thermostat continuously monitors the temperature in the boiler, and the standard safety automatic protects against overheating of the water. On the body of an excellent floor boiler, there is a thermometer / pressure gauge to control temperature and pressure.

Advantages:

• reliable construction;
• economical gas consumption;
• does not make much noise;
• ease of use;
• the price is lower 280 $;
• 12.5 kW model available.

2. Lemax Premium-20 20 kW single-circuit

An inexpensive but good gas boiler of the convection type is also produced by Lemax. The maximum thermal power of the device reaches 20 kW, which is enough for heating 180-200 m2. The efficiency declared by the manufacturer is 90%. To ensure an attractive cost, the manufacturer had to save on individual components. So, the heat exchanger is steel, not copper or cast iron, as in more expensive models. However, due to the special coating Lemax managed to provide good protection of this material against corrosion.

Advantages:

• overheating sensor;
• gas control function;
• automatic ignition;
• ease of maintenance;
• pressurized water up to 3 bar;
• reliability and practicality;
• not dependent on the power supply;
• reasonable cost.

3. BAXI ECO Four 1.24 24 kW single-circuit

Modern model made in Italy. Thanks to the wall mounting, this boiler can be used to heat an apartment. The useful thermal power of the device is 24 kW, and the gas consumption per hour of operation in the ECO Four 1.24 reaches 2.78 cubic meters for natural and a little more than two kilograms for liquefied. The maximum pressure in the heating circuit for this boiler is 3 bar.

The nominal pressure of natural gas for the monitored model is from 13 to 20 mbar. It is required to operate at the stated efficiency.

The device is equipped with a safety valve and is equipped with a gas control. ECO Four 1.24 safety systems provide protection against pump blocking, freezing and overheating. The boiler also has self-diagnostics. The size of the expansion tank of this model is 6 liters, and the efficiency is quite good 91.2%.

Advantages:

• copper heat exchanger;
• reliable and versatile;
• natural / liquefied gas;
• ease of connection;
• protective systems;
• several models in the line.

Disadvantages:

• average cost.

The best floor standing gas boilers

According to the method of installation, gas boilers for the home are divided into floor-standing and wall-mounted. The dimensions of such devices are usually 800 × 500 × 800 mm. The weight of the device depends on the materials used and does not exceed 100 kg. It must also be borne in mind that you need a place to install the boiler and piping. The latter consists of taps, bushings, pump and other parts. The boiler itself requires an outlet for the chimney, which is not a problem in private houses. A floor-standing gas boiler is an ideal option for a small private house or a two-story cottage, the heating of which the device can handle without problems.

1. Lemax Premium-30B 30 kW double-circuit

Productive, well-assembled and relatively inexpensive - this is how you can briefly describe the Premium-30V model from Lemax. This is one of the best gas boilers according to customer reviews, which already inspires confidence in it. If this is not enough for you, then any doubts will be debunked by a three-year official guarantee.

The line also offers a simpler single-circuit model Premium-30.

The power of this device is 30 kW. Its body is made of 2mm high strength steel. The system from Lemax is double-circuit, so it will provide not only heating, but also hot water. Its performance at a temperature of 30 degrees reaches 8 liters per minute. Natural gas consumption reaches 3.5 m3 / hour.

Advantages:

• long warranty;
• reliable Italian automation;
• pressure up to 3 atmospheres;
• power up to 30 kW;
• large serviced area of ​​300 m2;
• burner from Polidoro;
• SIT protective systems.

Disadvantages:

• the noise level is high.

2. Protherm Bear 40 KLOM 35 kW single-circuit

Excellent model with one circuit and a maximum heating output of 35 kW. Due to its high performance, the ability to work on both natural and liquefied gas (13-20 and up to 30 mbar, respectively), as well as advanced security systems for a country house, this boiler is just perfect. The device is equipped with an open combustion chamber with a high quality cast iron heat exchanger. The control in this model is electronic, and among the useful functions it provides self-diagnostics.

Advantages:

• electric ignition;
• information display;
• the possibility of remote control;
• operating mode "winter-summer";
• smooth power adjustment;
• heat exchanger protection.

Disadvantages:

• high price;
• room control is not included.

3. BAXI SLIM 1.300 iN 29.7 kW single-circuit

Floor standing boilers of the SLIM series from BAXI are in great demand on the Russian market. The heat exchanger of the units in this line is made of cast iron, and in addition to a power of 29.7 kW, the manufacturer also produces options for 22.1, 48.7, 62.2 kilowatts and so on.

The nominal pressure of natural gas for the monitored device is 20 mbar. But SLIM 1.300 iN can handle even drops of up to 5 mbar, which is a unique characteristic for floor-standing cast iron boilers.
The reliable manufacturer of gas boilers BAXI also offers boilers made in the same style for the SLIM series. An external control can also be connected to the unit. The official boiler warranty is 2 years.

Advantages:

• long service life without breakdowns;
• frost protection;
• automatic ignition;
• can be used to connect a warm floor;
• self-diagnosis function.

Disadvantages:

• high price.

The best wall mounted gas boilers

Wall-mounted boilers are more compact and lighter than floor-standing ones. With dimensions of about 850 × 500 × 500 mm, they weigh no more than 50 kilograms. As the name implies, such solutions are wall-mounted. In most cases, wall-mounted models are double-circuit, so they can both heat the home and provide hot water. In addition to smaller dimensions, the devices also boast built-in thermometers, pressure gauges, expansion tanks and pumps, so there is no need to provide a place for their installation. Another important plus of wall-mounted units is the possibility of using a vertical chimney pipe, due to which the boilers in question are also suitable for an apartment.

1. Kiturami Twin Alpha 13 15.1 kW dual-circuit

This category will start with a good boiler for a small house - Twin Alpha 13. This device is produced by Kiturami, and in Russian retail it is available at a price of 336 $... Despite such a modest cost, the device received a display, room thermostat and remote control. The boiler operates not only on natural, but also on liquefied gas. Due to the depth of only 21 cm, low weight (26.3 kg) and ease of installation, you can purchase a boiler for an apartment of this particular model.

Advantages:

• remote control;
• price-quality ratio;
• good efficiency of 91.2%;
• closed combustion chamber;
• complete thermostat;
• frost protection.

2. BAXI ECO-4s 24F 24 kW double-circuit

The economical gas boiler BAXI ECO-4s offers excellent quality and reliability. Its appearance is similar to the one-circuit model Four 1.24 from the same line discussed above. In addition to the design, the dimensions remained unchanged - 40 × 73 × 29.9 cm. But the weight increased by 2 kg and for this device it is equal to 30 kg.

The reviewed model is offered in several modifications. They are similar in design and construction, but differ in power, which can be identified by their name. So, 24F indicates a maximum capacity of 24 kW.But in the Russian market, modifications 10F and 18F are also available.

The coolant temperature in the popular BAXI gas boiler model ranges from 30 to 85 degrees. The productivity of hot water at 25 and 35 degrees is limited to 13.7 and 9.8 liters per minute, respectively. The nominal pressure for natural and allowable pressure for liquefied gas in ECO-4s 24F is declared at the level of 20 and 37 mbar.

Advantages:

• easy to assemble;
• low noise level;
• ease of maintenance;
• accuracy of maintaining the set temperature;
• high quality assembly;
• quality of construction;
• built-in protection made of composite materials;
• several modifications.

Disadvantages:

• there is no possibility of power adjustment;
• there are flaws in the assembly.

3. Bosch Gaz 6000 W WBN 6000-24 C 24 kW dual-circuit

Bosch primarily specializes in wall-mounted boilers. And the quality of such products of the German manufacturer does not cause any complaints, which allowed the Gaz 6000-24 model to take a leading position in the corresponding category.

Its thermal power is in the range of 7.2-24 kW. The heat exchanger of the device is made of copper. The boiler operates on natural or liquefied gas, consuming them at a rate of 2.3 cubic meters. m or 2 kg per hour, respectively. Dimensions and weight of 6000-24 are equal to 400 × 700 × 299 mm and 32 kg.

The manufacturer provides a 2-year official warranty for its device. However, the company's declared service life is 15 years. The hot water output in the monitored boiler is 11.4 and 6.8 l / min for a temperature of 30 and 50 degrees.

Advantages:

• expansion tank 8 liters;
• optimal performance;
• excellent German quality;
• economical gas consumption;
• Ease of controls;
• the heat exchanger is made of copper;
• neat assembly, management.

Disadvantages:

• some buyers get EA error.

The best double-circuit gas boilers

For a number of reasons, double-circuit boilers may be preferable. For example, they do not need a boiler to supply hot water, and the absence of additional equipment not only saves space, but also reduces the load on the power grid. And the cost of some double-circuit models is comparable to single-circuit counterparts. However, they cannot provide a supply of warm water, heating only the amount that is currently needed. With double-circuit devices, it is not possible to install a circulation pump. Because of this, hot water can reach the tapping point only after some time. Otherwise, these are excellent solutions for both a private house and an apartment.

1. Lemax PRIME-V32 32 kW double-circuit

It is difficult for an inexperienced buyer to choose a good gas boiler with two circuits without spending extra money on it. Manufacturers offer dozens of great solutions, but many of them either do not meet user needs or are over budget. Fortunately, there is one really great device on the market that is receiving numerous positive reviews - the PRIME-V32 from the Lemax brand.

The thermal power of the device is 11-32 kW at a gas pressure of 13 to 20 mbar.

To date, the manufacturer offers 10 devices in the PRIME-V line. The 32 kilowatt model is the most powerful in the company's range. All units in this series support the control function from mobile devices running Android and iOS. Also, the technique can be used with additional equipment.

Advantages:

• attractive price;
• performance;
• high degree of efficiency;
• European components;
• low noise level;
• availability of an LCD display;
• reed switch flow sensor.

2. Bosch Gaz 6000 W WBN 6000-35 C 37.4 kW dual-circuit

Moving on to the most powerful boiler in the ranking. Despite the similar name, this model differs from the previously described device from the six thousandth line not only in power.The expansion tank in this boiler has increased by 2 liters, and the hot water capacity has increased to 9.6 and 15 l / min at a temperature of 50 and 30 degrees, respectively. The consumption of natural and liquefied gas also increased up to 3.9 m3 and 2.7 kg per hour. The dimensions did not change much (the device became 16 mm wider), and 7 kg were added to the weight of the boiler.

Advantages:

• impressive power;
• balanced cost;
• high build quality;
• high-strength copper heat exchanger;
• quick installation;
• convenient control.

Disadvantages:

• complex initial setup.

3. BAXI LUNA-3 310 Fi 31 kW double-circuit

The TOP boilers are completed by a modern double-circuit solution for wall installation. The LUNA-3 310 Fi model is adapted for domestic water and gas supply systems. The device remains operational when the inlet pressure drops to 5 mbar.
A control panel with a display is located on the boiler body. It is removable, so the user can place it in any convenient place. As an additional option, the manufacturer offers a wireless panel with a temperature sensor.
After reconfiguration, the BAXI 2-in-1 boiler can be operated with liquid gas (permissible pressure 37 mbar). This makes 310 Fi a good choice for summer cottages and cottages.

Advantages:

• liquid crystal display;
• electronic self-diagnosis system;
• ionization gas control function;
• reliable electronics;
• pump blockage protection system;
• chic functionality;
• the ability to connect a thermostat.

Disadvantages:

• not the easiest installation.

What to look for when choosing a gas boiler

There are many criteria for choosing a boiler that can be taken into account before purchasing. If you don't know enough about the issue, then a reasonable solution would be to read customer reviews and get expert opinions. If you want to figure it out on your own, then you need to consider the following parameters:

1. type of gas boiler (floor, wall);
2. heat exchanger material (steel, cast iron, copper);
3. number of contours;
4. installation features;
5. serviced area;
6. volatility;
7. power and so on.

Also pay attention to the conditions of use. For an apartment and a country house, a shop and an office, a warehouse and other facilities, different gas boilers will be required.

How to calculate the boiler output

It is better to trust this procedure to a specialist, since he will be able to accurately determine the required performance of the unit. If the buyer wants to independently calculate the power, then he needs to consider:

• the size of the walls and the quality of their insulation;
• the presence of an attic and basement;
• climatic zone and area of ​​the premises;
• the volume of consumption of hot water, etc.

The specific power of the boiler for the southern regions should be about 0.8 kW for every 10 square meters of area, and for the northern regions - from one and a half to two kilowatts. In the middle lane and the Moscow region, the optimal values ​​are 1-1.5 kW.

But keep in mind that the values ​​obtained relate exclusively to heating the house. If you also need the organization of hot water supply, then the estimated capacity of the two-circuit system must be increased by an average of 25%. Add to this and the safety factor to the total productivity in the amount of 1.15 to 1.2.

The dissipation factor is another important indicator, the value of which depends on the type of building. In wooden houses and buildings made of corrugated iron without thermal insulation, it is 3.0-4.0, and with low thermal insulation - from 2.0 to 2.9. For buildings with a medium to high level of thermal insulation, the dissipation coefficient is 1.0-1.9 and 0.6-0.9.

Which gas boiler is better to buy

The choice of a specific model depends on the needs of the buyer. If we talk about brands, then the BAXI brand became the unambiguous leader of the rating. It offers excellent solutions at a well-reasoned cost. However, among wall units, Bosch won with its six thousandth series. It is important that it is offered in several power options. Also in the rating of the best gas boilers, Lemax also showed its best side.In addition, its equipment is being developed and assembled in Russia.