Lemax gas boilers - technical characteristics and user reviews

Rating of the TOP 12 best gas boilers Lemax

How to choose and what to pay attention to?

In order not to make a mistake when choosing a Lemax boiler, you should take into account a large number of characteristics.

Gas boilers can be divided into the following types:

• Condensation . The heat exchanger in boilers of this type is heated by gas combustion, heat is transferred from the condensation of steam in the flue gases. The special design of a gas boiler allows such heat exchange to be achieved.
• Turbocharged . In boilers of this type, gas condensation does not occur, so heating occurs only due to the combustion of gas masses.
• Convection . This is essentially the same turbocharged boiler, but without a turbine, which increases the level of efficiency of the equipment.
• Parapet . In many ways they resemble convection gas boilers; the design of these devices allows them to be used as a radiator.

Gas boilers using condensing heating have an energy efficiency that is approximately 20% higher than all others.

The best double-circuit gas boilers Lemax in price/quality ratio

One of the main criteria for choosing gas boilers is the ratio of price and quality. The following models from Lemax are the best options from this point of view.

Lemax Premium-30B 30 kW double-circuit

Floor-standing double-circuit gas boiler with a maximum power of 30 kW, which allows it to cope with heating a room of 300 square meters.

The boiler has mechanical control.

The boiler can be used for heating the room, as well as for preparing hot water.

The model uses natural gas and comes with a special gas burner device developed on the basis of Italian automation.

Specifications:

• Boiler type – double-circuit;
• The combustion chamber is open;
• Mounting method – floor;
• Maximum thermal power – 30 kW;

pros

• High power;
• Affordable price;
• Pleasant appearance;
• Ergonomics;

Minuses

• No

Lemax PRIME-V20 20 kW dual-circuit

Double-circuit wall-mounted gas boiler with a maximum power of 20 kW, which allows you to heat a room up to 200 square meters.

It has a closed combustion chamber, equipment efficiency reaches 92.5%.

The boiler is made from European components from the best manufacturers, including: POLIDORO, NordGas, Valmex, Bitron and some others.

The device is also adapted to possible gas pressure differences.

Specifications:

• Mounting method – floor;
• Maximum thermal power – 20 kW;
• Combustion chambers - turbocharged, chimney;
• Boiler type – double-circuit;
• Fuel used – Gas;

pros

• Good value for money;
• Availability of electronic control;
• Thoughtful appearance and ergonomics;
• Low fuel consumption;

Minuses

• No

Lemax PRIME-V32 32 kW dual-circuit

This is a wall-mounted double-circuit boiler with a maximum power of 32 kW from the manufacturer Lemax.

It has electronic control, a built-in circulation pump and a built-in expansion tank.

In the production of the boiler, components from well-known European brands POLIDORO, NordGas, Valmex, Bitron are used.

The unit has a high level of safety and has stable performance indicators throughout its service life.

Specifications:

• Boiler type – double-circuit;
• Combustion chamber – closed;
• Maximum thermal power – 32 kW;
• Heat exchanger type – bithermal;
• Electrical power – 135 W;

pros

• Affordable price with high quality and power;
• High power;
• Convenient electronic control;

Minuses

• No

Advantages of Lemax gas boilers

Lemax boilers are a worthy representative of the product in its category. There are several advantages in its design that experts do not question.

• High maximum productivity of the unit, plus quite good efficiency. The manufacturer set itself the goal of squeezing as much thermal energy out of the fuel as possible. And he succeeded. It should be noted that in terms of such an indicator as “efficiency”, domestic heating installations are inferior to their European counterparts. But all this is compensated by the power indicator.
• The design of the boiler is minimalism, which, as life has shown, is the best option when it comes to interior design. Women especially pay attention to this. They care more about appearance than technical characteristics. Let's just say that it would not be a shame to install any models of gas boilers from Lemax in the kitchen, bathroom or other room of the house. Laconic designs will fit perfectly into any interior.
• And one of the most important parameters, which is often the main selection criterion, is the price of the product. Firstly, according to this indicator there is no need to compare domestic and foreign analogues. Everything is clear here. Secondly, even in the domestic price range, Lemax gas appliances are the cheapest. That is, the optimal ratio of high quality and reasonable price is met in this boiler.

The best single-circuit gas boilers Lemax

Often, when buying gas boilers, people want to purchase the best option that can serve them for a long period of time and will effectively cope with the task of heating the room. The three best single-circuit gas boilers from Lemax include the following models.

Lemax Premium-16 16 kW single-circuit

Inexpensive floor-standing single-circuit gas boiler from the Lemax company, with a power of 16 kW, which is quite enough to heat a room up to 160 square meters.

Non-volatile, equipped with mechanical control.

The device maintains efficiency indicators throughout its entire service life.

It is distinguished by high build quality and consists of components from the best European manufacturers, which ensures this gas boiler a long service life and high-quality operation.

Specifications:

• Boiler type – single-circuit;
• The combustion chamber is open;
• Efficiency – 90%;
• Fuel – gas;

pros

• Low price;
• Reliability;
• Ease of use;

Minuses

• No

Lemax Patriot-12.5 12.5 kW single-circuit

An affordable single-circuit boiler (average cost about 18 thousand rubles) with a power of 12.5 kW.

It has a mechanical type of control and is non-volatile.

The unit is excellent for working with forced and natural heating systems.

The presence of a chimneyless design makes this boiler an excellent solution for both home and apartment.

The equipment is manufactured using components from well-known European manufacturers.

Specifications:

• Boiler type – single-circuit;
• Maximum thermal power – 12.5 kW;
• Heat exchanger material – steel;
• The fuel used is natural gas;

pros

• Low cost;
• High level of reliability;
• Thoughtful appearance;

Minuses

• No

Lemax Patriot-10 10 kW single-circuit

Floor-standing single-circuit gas boiler from Lemax, designed specifically for small spaces up to 100 square meters.

It has a very affordable price and has a mechanical control type. The maximum thermal power of the boiler is 10 kW.

Suitable for both natural and forced heating systems . Air intake for work is carried out from outside the room.

It can be installed both in a house and in an apartment, thanks to its chimneyless design.

Specifications:

• Installation option – floor;
• Boiler type – single-circuit;
• Maximum thermal power – 10 kW;
• Combustion chamber – closed;

Main strengths:

• Profitable price;
• Ease of use;
• Reliability;

Popular models

Next we will look at the most popular Lemax boilers running on natural gas. We will talk about the features of the equipment and its technical characteristics. After reading the review, you will be able to make the right choice.

Lemax Premium 10

Here we have a simple floor-standing convection gas boiler with a power of 10 kW, designed to heat rooms up to 100 square meters. m. The model operates at a pressure in the circuit of up to 3 atmospheres, heating the coolant to +90 degrees. Its heart is a steel heat exchanger, protected from overheating by mechanical automation. The maximum natural gas consumption when operating at full power is no more than 0.6 cubic meters. m/hour. The combustion chamber in this boiler is open type; a full-fledged chimney is required for the operation of the equipment. The estimated price for Lemax Premium 10 is 17-18 thousand rubles.

Lemax PRIME-V24

Inexpensive, reliable and efficient - this is how we can characterize this double-circuit boiler for heating a private home.
The power of the model is 25.5 kW, efficiency is up to 92.5%. Smoke is removed from its closed combustion chamber in two ways - through a coaxial chimney or through a separate smoke removal system (air is taken in through one pipe and removed through another). The performance of the DHW circuit is up to 13.1 l/min. There is already a circulation pump and a 6-liter expansion tank on board. Additional modules and features:

• self-diagnosis;
• electronic flame modulation;
• security group;
• water filtration;
• power adjustment over a wide range (from 9 kW).

It is possible to connect a remote control system via a GSM channel. The average price in Russian online stores is about 29,000 rubles (compared to Vaillant, Bosch or Protherm, this is an excellent price tag).

Lemax Clever 20

In front of us is a floor-standing gas boiler with a capacity of 20 kW. It runs only on natural gas and is equipped with an electronic control system. The unit is built according to the classical design with an open combustion chamber. Its maximum efficiency is 90% (more efficient models exist). The heat exchanger is steel, which makes the boiler inexpensive and durable. The advantages of the Lemax Clever 20 model are weather-dependent automation, electronic flame modulation, remote control. Price – about 32 thousand rubles.

Lemax Patriot-12.5

The Lemax parapet boiler is designed for wall mounting with exhaust of combustion products through a two-layer chimney behind the same wall. It is built on the basis of a steel heat exchanger installed in a closed combustion chamber. The maximum temperature in the heating circuit is +80 degrees at a pressure of up to two atmospheres. The thermal power of the device is 12.5 kW, the efficiency indicator is up to 87%. Despite the use of a closed combustion chamber, the unit does not require connection to the electrical network and operates in autonomous mode. You can buy it for about 18 thousand rubles.

Lemax Premium-25V

For heating a private home and preparing hot water, a double-circuit floor-standing gas boiler Lemax Premium-25V is suitable. The manufacturer equipped it with an atmospheric combustion chamber and a steel heat exchanger. The power of the unit is 25 kW, the maximum heating area is 250 square meters (do not forget about the need for a reserve of 15-20%). The efficiency of the model is 90%, the productivity of the hot water supply circuit is 7 l/min. Estimated price – 29 thousand rubles.

Lemax Gazovik AOGV-11.6

This boiler is interesting for its dimensions - it is 685 mm in height, 282 mm in width, and 473 mm in body depth. The design turned out to be compact, just for small-sized boiler houses. The model was equipped with an open combustion chamber with a durable steel heat exchanger installed above it. The control system used is mechanical; the equipment does not require connection to an electrical network. The coolant in the heating circuit warms up to +90 degrees, and all safety systems on board provide monitoring for the presence of gas. The cost of the model on the domestic market is about 14 thousand rubles.

The best floor-standing gas boilers Lemax

When the need arises to use a high-power gas boiler, most people give preference to floor-standing models, since they are traditionally designed for this. The Lemax company produces a considerable range of floor-standing gas boilers, the best of which we will consider below.

Lemax Premium-30N 30 kW single-circuit

Popular offer from Lemax . Single-circuit floor-standing energy-independent gas boiler with a maximum thermal power of 30 kW.

The device has a mechanical control type and is quite suitable for heating large rooms up to 300 square meters.

Moreover, everything has a very affordable price, around 28,000 thousand rubles.

It has a high build quality; in the manufacture of this gas boiler, reliable components from well-known European manufacturers were used.

Specifications:

• Combustion chamber – open;
• Maximum thermal power – 30 kW;
• Efficiency – 90%;
• Boiler type – single-circuit;

pros

• Excellent value for money and quality;
• High power;
• Thoughtful appearance and ease of use.

Minuses

• No

Lemax Leader-35 35 kW single-circuit

Floor-standing single-circuit gas boiler from the manufacturer Lemax, with a high power rating (35 kW).

Suitable for heating rooms up to 350 square meters. Equipped with a mechanical control type.

Features a high level of reliability, ease of use and long service life.

The device uses a gas valve from Italian, as well as other components from.

Specifications:

• Boiler type – single-circuit;
• Maximum thermal power – 35 kW;
• The combustion chamber is open;
• Efficiency – 90%;

pros

• High power of the unit;
• Long service life;
• Ease of use;

Minuses

• No

Lemax Wise 25 25 kW single-circuit

Single-circuit gas boiler using electronic control . The maximum thermal power of the equipment is 25 kW.

The boiler efficiency reaches 90%, the primary heat exchanger is made of cast iron. The combustion chamber is open.

Suitable for heating rooms of no more than 250 square meters.

Suitable for use in both natural and forced heating systems.

Consists of components from well-known European manufacturers: SIT, POLIDORO.

Specifications:

• The combustion chamber is open;
• Maximum thermal power – 25 kW;
• Installation method – floor;
• Boiler type – single-circuit;

pros

• Good power indicator;
• Ease of use;
• Durability;

Minuses

• No

We disassemble Lemax gas boilers: review, automation, technical characteristics

In the fast-growing heating equipment market, almost every year more and more new brands and models of floor-standing gas heating boilers appear. This often concerns imported equipment, although Russian manufacturers are also trying to keep up and meet European quality standards and modern technologies.

for floor-standing gas boilers Lemax manufactured in Taganrog can increasingly be seen on the global network in various reviews on heating topics.

I suggest that we take a closer look at the boilers of the Russian Lemax brand. Let's analyze the model range, technical characteristics, how different models differ, consider the types of automation installed on them, and the principle of operation, according to the operating instructions.

Model range and technical characteristics

Lemax gas floor-standing boilers of the Premium series are produced from high-strength steel 2 mm thick. They have a model range: from household ones - with a power from 7.5 kW to large industrial ones, with a power of up to 100 kW.

The most popular models among the population are KSG Premium-7.5, -10, -12.5, -16, -20. Even the lowest-power boiler of 7.5 kW is capable of heating a small private house with an area of ​​up to 70 square meters, 10 kW up to 100 m2, etc.

Lemax floor-standing gas boilers

The Lemax gas boiler is completely energy independent. Starting is carried out using a piezo ignition button. Unlike Mimax boilers

, these models are equipped with a draft sensor for safe operation of the boiler, which is activated in case of a problem with the draft in the chimney.

Just like Conord boilers

, they can be used on natural gas with natural or forced circulation of coolant in the heating system. These models are not equipped with a circulation pump, but it can always be installed separately in the system. When replacing jets (nozzles), the boiler can also operate on liquefied (cylinder) gas.

In addition, you can find Lemax floor-standing gas boilers of the “Leader” series on the market. A distinctive feature of this model is that they are made of cast iron with a wall thickness of 4 mm, equipped with imported SIT automatic equipment, a draft sensor, protection against overheating and soot formation. But we will talk about them in more detail next time.

Lemax steel heating gas boilers are produced as single-circuit, designed only for heating, and double-circuit - heating and hot domestic water. Double-circuit boilers have a built-in copper heat exchanger for hot water supply.

Lemax Premium double-circuit boilers are designated KSGV - steel gas hot water boiler. They are produced with power from 12.5 to 40 kW. But, as practice and reviews show, in order for the performance of the secondary circuit to be normal, it is necessary to purchase a boiler with a capacity of at least 20 kW, and better yet, more.

The diameter of the fittings for connection to the heating system is:

— 40 mm (1 1/2′) for models KSG-7.5 and KSG-10 — 50 mm (2′) for models of higher power

The diameter of the pipe for installing the chimney is:

— 100 mm for models KSG-7.5 and KSG-10 — 130 mm for models KSG-12.5, KSG-16, KSG-20, KSG-25 and KSG-30

The diameter of the gas connection for models with a rated thermal power of up to 30 m2 is 15 mm or 1/2 inch.

Automation for gas boilers Lemax

A characteristic feature of these heating boilers is the presence of various types of automatic devices on them. They are equipped with imported Italian type “NOVA SIT”. Let's look at the gas burner device in detail using the diagrams below.

Design of a Lemax boiler with GGU automation (gas burner device)

Automation of GGU

1 - gas boiler 2 - gas burner 3.4 - shutdown and start buttons, respectively 5 - thermostat 6 - gas connection 7.8 - forward and return lines of the heating circuit 9 - thermometer 10.11 - DHW outlet and inlet (at dual-circuit models) 12 - temperature sensor tube

:

- open the gas tap, then turn the thermostat knob to position “0”

— bring a burning match through the viewing window to the igniter, press the button to turn on the magnetic valve (ignition of the pilot burner)

- hold the button for 1 minute until the pilot light starts to burn

— to ignite the main burner, you must move the thermostat knob to position “4”

— then we set the handle to the position we need

— to turn off, press the “off” button

Design of a Lemax boiler with imported NOVA SIT automatic equipment

Automation EuroSIT boiler Lemax

1 - gas boiler 2 - gas burner 3 - knob for adjusting the temperature and ignition of the burner 4 - piezo ignition button 5 - temperature sensor tube 6 - viewing window 7 - gas connection 8.9 - direct and return for connecting the coolant 10 - thermometer 11.12 - inlet and DHW circuit outlet (for dual-circuit models) 13 - stainless steel gas hose

:

- open the gas tap

— set the thermostat knob to the ignition position

- press it all the way and hold it for 1 minute, while simultaneously pressing the “piezo” button until a flame appears

- the main burner is turned on by setting the thermostat knob to position from 1 to 7

— to turn off the burner, turn the knob to the “off” position

Technical characteristics

Technical characteristics of Lemax boilers

Possible malfunctions in the operation of the Lemax floor-standing gas boiler

1. Spontaneous shutdown of the main burner.

Reason: poor draft in the chimney or malfunction of the thermostat.

2. Smell of gas, leak.

It will be necessary to check the threaded connections and replace the gaskets.

3. The flame is elongated and burns red-orange.

Poor draft in the chimney, clogged burners.

4. Cold radiators

in the system, and the boiler itself is hot.

Lack of coolant volume in the system or errors during installation of the system.

Let's watch the video So, we have disassembled Lemax gas boilers , examined the main models of this brand, their features and internal structure, operating principle and technical characteristics. We clearly learned how to use automation, as well as promptly identify possible problems in the operation of the heating boiler.

The best wall-mounted gas boilers Lemax

Wall-mounted boilers are a convenient and compact solution for small and medium-sized rooms. The Lemax company produces a large range of wall-mounted gas boilers. The best among them are presented below.

Lemax PRIME-V24 24 kW dual-circuit

Wall-mounted double-circuit gas boiler, the maximum thermal power of which reaches 24 kW.

The equipment is equipped with an electronic control system. Also has a built-in circulation pump and a built-in expansion tank.

It is quite suitable for heating water and heating a room up to 240 square meters. Boiler efficiency reaches 92.5% .

The unit has separate heat exchangers.

For its successful operation, a connection from the electrical network is required in order to maintain the manufacturer's warranty; it is recommended to use a voltage stabilizer.

Specifications:

• Installation method: wall-mounted;
• Boiler type – double-circuit;
• Maximum thermal power – 24 kW;
• Chimney type – turbocharged;

pros

• High power rating;
• Ease of use;
• Good value for money;

Minuses

• No

Lemax PRIME-V28 28 kW dual-circuit

Gas wall-mounted double-circuit boiler from the manufacturer Lemax . The maximum thermal power of the equipment reaches 28 kW.

The device is equipped with a built-in expansion tank and a built-in circulation pump.

Has electronic control . It has a thoughtful appearance.

The development of the unit was carried out by the Lemax company’s own engineering center, under the supervision of the famous Italian manufacturer SIT GROUP.

In the manufacture of the gas boiler, only reliable components from well-known European brands were used.

Specifications:

• Installation method: wall-mounted;
• Maximum thermal power - 28 kW;
• Efficiency – 92.5%;
• Timing of the chimney – turbocharged;
• Boiler type – double-circuit;

pros

• High power rating;
• Durability;
• Convenient control;
• Good value for money;

Minuses

• No

Lemax PRIME-V14 14 kW dual-circuit

Double-circuit wall-mounted gas boiler with a maximum thermal output of 14 kW . Has an electronic control method.

Equipped with a built-in circulation pump, as well as a built-in expansion tank.

Suitable for heating rooms of no more than 140 square meters.

It has an ergonomic and thoughtful design, which allows it to fit perfectly into almost any modern interior.

In the production of the boiler, components from well-known European manufacturers are used.

Specifications:

• Boiler type – double-circuit;
• Maximum thermal power – 14 kW;
• Combustion chamber – closed;

pros

• Reliability;
• Good value for money;
• Ease of management;

Minuses

• No

Range of gas boilers "Lemax"

Leader, Premium and Premium Nova are series in which Lemax gas boilers are presented.

The technical characteristics of the devices vary not only depending on the series, but also depending on the power of each device.

Leader Series

Boilers in this series are made of very high quality cast iron with a thickness of 4 mm. The boiler heat exchanger is coated with a special compound that prevents the formation of rust and extends the service life of the device.

The service life of these boilers is estimated by the manufacturer at 25 years, and warranty work is provided for the first three years of operation of the device. Boilers of this series are equipped with the ability to operate from the electrical network, so they are an excellent autonomous solution for any objects where there are gas or electric lines.

Premium Series

The heat exchanger of these installations is cast from steel 2 mm thick.

To improve its thermal insulation qualities, it is additionally coated with a special enamel, which reduces heat loss and prevents the formation of rust.

Boilers of this series operate exclusively on gas fuel. The performance of the devices is from 10 to 40 kW, which is enough to heat rooms up to 500 m2. The devices are equipped with an automatic control system that controls the operation of the boiler, preventing interruption of draft, gas leakage and protecting the device from overheating. Lemax Premium series boilers, reviews of which are given in this article, have two heating circuits.

Premium Nova

Boilers in this series are made of steel, have one circuit and are represented by a large number of models with different heating capacities. As in models of other series, the heat exchanger of these models is also covered with a special enamel, which increases the thermal insulation properties of steel. The devices are equipped with a variety of automation systems that facilitate the operation of boilers.

Option for igniting fuel in equipment

At the moment there are two main ways to ignite gas boilers:

• Piezohorn . The ignition method resembles a lighter; on the body of such a boiler there is a special button, when pressed, a spark appears that ignites the fuel.
• Electronic . Automatically triggered when the gas boiler is turned on. To ignite in this way, you do not need to press any buttons; all control is carried out by the gas boiler system.

Installation method

According to the installation method, boilers can be:

• Wall-mounted (maximum power 100 kW);
• Floor-standing (high-power gas boilers);

When choosing equipment according to this criterion, you should initially decide what power boiler you need.

For the reason that it is impossible to install a boiler with a power of more than 100 kW on the wall. If you need a higher power boiler, then you should purchase a floor-standing one.

Types of Lemax gas boilers

Lemax company produces several different types of gas boilers:

• Double-circuit boilers;

A boiler that operates on two circuits: heating and water supply. With its help you can not only heat the room, but also heat water.

• Single-circuit boilers;

This equipment has only one circuit - heating. It only allows you to heat the room; it cannot be used to heat water.

• Wall boilers;

A group of compact gas boilers, whose power cannot exceed 100 kV, are mounted on the walls.

• Simple gas boiler;

A device that, when fuel burns, heats the coolant, thereby heating the room.

• Solid fuel boiler;

A heating device made of cast iron or steel, which, due to the combustion of solid fuel, releases thermal energy used to heat the room. The following fuels can be used in such boilers: peat, coal, firewood, fuel pellets.

Gas boilers Lemax Premium 10

The Taganrog Lemax plant produces several lines of gas boilers, of which the Premium series can be considered the most extensive.

It consists of models of varying power, from 7.5 to 100 kW . All installations are floor-mounted structures that do not use electrical energy. This feature is very attractive for residents of the private sector or owners of country houses, where interruptions or power outages often occur.

The Premium series offers a wide selection of units for rooms of any size and volume.

There are models with a power from 12.5 to 40 kW, capable of preparing hot water, which allows them to be considered conditionally double-circuit. They have a copper coil built into the heated water jacket, where thermal energy is transferred to the flow of domestic water .

The boilers have a removable top panel, which simplifies access to internal parts and components during repairs or maintenance.

How to choose the power of a gas boiler?

One of the main parameters when choosing a gas boiler is its power. It determines how efficiently the equipment will operate and how much area it can heat.

To choose the power of a gas boiler for an apartment or private house, you must proceed from the fact that 1 kW is required to heat approximately 10 square meters of a room, provided that the ceilings in the room are no higher than 3 meters.

In the same case, if there is a need to heat the basement or rooms with high ceilings, the power must be increased.

Thus, if the area of ​​your private house or apartment is 60 square meters, you should pay attention to gas boilers whose power is around 6 kW.

Rating updated September 12, 2021.