Lemax gas boilers: review, reviews, faults

The Lemax gas boiler has long been known to consumers in Russia and the post-Soviet space. The equipment produced by the domestic company of the same name is capable of heating a house of any size, the main thing is to correctly calculate the minimum power. The manufacturer offers several series of heaters - with promising names Leader, Patriot, Wise, Prime-V and Wester Clever. Each series was developed for domestic conditions. All models have Russified automation, they are easy to maintain and operate.

About company

The history of the brand began in 1992, in a semi-basement in the city of Taganrog. The company, having gone from a mini-firm, has grown to a large plant, and has taken a stable position in the domestic market. The equipment is produced on high-tech lines, which allows us to produce competitive products at prices attractive to domestic consumers. The boilers of the Taganrog plant correspond to the ideal ratio of the “price-quality” formula.

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.

Advantages

Judging by the reviews, the products of the Taganrog plant evoke more positive emotions among users than negative ones. It really deserves praise in terms of design, performance and economy. Its advantages include:

• High efficiency – 90-92%. This is a good characteristic for domestic gas appliances.
• Visual appeal – the heaters have an ergonomic design and look beautiful in modern interiors.
• Safe operation – a reliable, multi-stage protection system is provided.
• Easy connection.
• Long service life - with proper operation and timely maintenance, they can last a quarter of a century. Warranty – 3 years.

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 . Maximum thermal

equipment power 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 . It has

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

Floor models

Floor-standing devices make up the lion's share of products produced by the manufacturer. And there is greater demand for them among consumers. Such versions are usually used for heating a private home - here you need more power and reliability. Wall-mounted versions are more often chosen by apartment owners - but they cannot compete with European brands. The principle of operation is simple - the burner built into the housing heats the heat exchanger of the heating system and hot water supply - if there is a second circuit. Coolant circulation – natural (non-volatile) or forced (volatile). Piezo ignition is used. A floor-mounted gas heater comes with heat exchangers:

• With steel. Thickness – 2 mm. Steel single-circuit floor-mounted boilers are non-volatile and work only for heating. Double-circuit - simultaneously heat water for domestic needs. The models are economical - gas consumption is almost the same as that of the Vailant.
• With cast iron. Thickness – 4 mm. The cast iron single-circuit heating boiler has the best characteristics in the entire Lemax model range. Cast iron is resistant to aggressive environments and is not afraid of overheating. Heat exchanger type – sectional. Manufactured by VIADRUS (Czech Republic).

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;

Mounted models

The wall range is more modest. All models are volatile. Automation - Italian production. Settings are factory settings. There is no need to adjust anything during operation. The main thing is to ensure voltage stability. If desired, the automation is connected to a block of remote thermostats. There is protection from:

• overheating;
• blowing out the fire;
• soot formation;
• reverse thrust.

Minus - there is no protection against freezing and pump jamming. The modulation burner, like the automation, is Italian. The modulation principle allows for economical gas consumption and increases the efficiency of the device. The connection is classic. Requires connection to a conventional chimney.

Construction of Lemax boilers

The main components of any gas heater:

• Gas burner unit – burner (POLIDORO, Italy), wick (igniter), piezo ignition. By pressing the button, the piezoelectric element is activated and the wick is ignited with its help. The main burner is ignited by the igniter.
• Heat exchanger. Tubular type, pipes are connected to the heating system. The coolant is heated in it. If there is a hot water supply, you need to take into account that when the water heater mode is turned on, the heating system pauses operation.
• Automation. Control board and sensors from NordGas. Gas Valve Sit.
• CIMM expansion tank.
• Wilo circulation pump.

The company independently develops the layout of elements and components, operating instructions, and expands its network of service centers. The brand has repeatedly become the sales leader among floor-standing boilers for autonomous heating of private housing construction and industrial premises.

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

non-volatile 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 . Maximum

The 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

Installation

Violation of installation rules leads to breakdowns and malfunctions. It is recommended to entrust installation to specialized specialists. The installation requirements for Lemax heaters are no different from conventional ones, but there are nuances that are important to consider:

• The automation unit contains a traction sensor. If combustion products are not removed intensively enough, the burner will turn off. During installation, it is necessary to provide for the creation of conditions for traction. The manufacturer advises connecting the device to a chimney made of sandwich pipes.

There is no need to waste time or material resources to connect and launch – everything is done simply and quickly. The settings, as mentioned above, are factory settings, and the adjustment is mechanical.

Automation block

The gas valve plays a key role here. It is controlled by analog sensors (in non-volatile versions) or electronic controllers that receive data from electronic sensors (in volatile versions).

The combined type valve is assembled from two valves - simple and electromagnetic. The first is held open by a spring. During startup, the second valve opens by pressing a button to light the wick. It is held for some time - the igniter warms up a special element - one that reacts to heat. This element begins to generate electric current - it holds the solenoid valve open, the user can release the button. When the igniter is blown out, the thermoelement cools down - the generation of electric current will stop, and the solenoid valve will close. The other valve, with a spring, will close after receiving a signal from the draft and temperature sensors.

Possible faults

The equipment of Taganrog manufacturers undoubtedly requires some improvements. Problems often arise with heating water - the devices cannot provide users with the desired amount of hot water in the required volume. Therefore, it is more profitable to buy a single-circuit device, and then connect a BKN to it - an indirect heating boiler. You can also choose a mounted or parapet (with a closed combustion chamber) boiler. Possible problems:

• The burner turns off spontaneously. The reason for this may be insufficient draft or breakdown of the thermostat.
• It smells like gas. Perhaps the leak is due to bad gaskets in the threaded connections - replacement is needed.
• Long, red-orange flame. Burners are clogged or there is insufficient draft.
• Cooled batteries with a hot boiler - there is not enough coolant or errors were made during installation.

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

Service

Some malfunctions identified during operation can be eliminated yourself:

• Problems with the traction sensor. It can cause an emergency shutdown when there is excellent traction. False alarms occur due to oxidation of the contacts - they need to be cleaned. If the sensor is completely broken, it is easy to replace it with a new one.
• Problems with the igniter. Ignition does not occur due to weak combustion of the wick. How to fix the situation? Set the desired flame power. You can read about this in detail in the instructions. The equipment is also supplied with a connection diagram and data sheet.

In almost any specialized store you can buy components and parts that need to be replaced. Repairs may only be carried out by authorized personnel.

Model overview

The manufacturer offers several lines, which include all possible boiler designs - atmospheric and parapet, single- and double-circuit, steel and cast iron, floor-mounted and wall-mounted.

Western Clever

The line of four models are atmospheric convection boilers, differing only in power indicators. Wester Clever 20/30 is characterized by high heat transfer; the coolant at the outlet heats up to 90°C. Characteristics of Wester Clever 30:

• Efficiency – 90%.

• Heating power – 34,000 W.

• Weighs 85 kg.

• HxWxD – 961x470x556 mm.

• Fuel consumption – 1.75 cubic meters/hour.

Wester Clever 40 – has a higher throughput. Fuel consumption is 2.5 cubic meters/hour. Heating capacity 45,000 W. Weighs – 110 kg. The most powerful representative of the series is Wester Clever 61.

It can operate independently of energy or be connected to the mains. Maximum gas consumption – 3 cubic meters. m/h. Works smoothly even at a pressure of 6 mbar.

Premium

Installed in rooms with chimneys. The power range in the line is from 8 to 100 kW. There are modifications with one and two circuits. Universal - can be connected from any side - left or right. Automatic control of fire intensity. Made from 2 mm steel sheets. Heat exchangers are treated with anti-corrosion agents. Devices are provided to prevent the flame from blowing out. As an example - Premium 16:

• Efficiency – 90%.
• Single-circuit. Atmospheric type.
• Volatile.
• Heating capacity 16,000 W.
• Weight – 55 kg.
• Heats up to 160 m².

Premium boilers 70-100 kW are suitable for heating large areas. These are powerful devices weighing up to 250 kg.

Premium Nova is a modernized version in the Premium line. There is automation that supports the specified parameters. Adjustment of coolant pressure is provided.

Patriot

It is possible to work with any type of ventilation - natural or forced. Parapet and wall versions can be installed in apartments. Combustion products are discharged through a coaxial chimney. The heat exchanger is treated with an anti-corrosion compound. Power 6-20 kW. There are injection mini-torch burners and overheating protection. Features of Premium -12.5:

• Efficiency - 87%

• 12.5 kW.

• Parapet installation.

• Non-volatile.

• Closed firebox.

• 50 kg.

Wise

Material – Czech cast iron (4 mm). Ideal ratio of coolant volume to heat exchanger mass and area. They are not afraid of temperature and gas pressure surges. If desired, switch to liquefied fuel. You can also connect indirect heating tanks, thermostats, and remote climate control systems. The heating capacity in the line is from 16 to 60 kW. Wise 35 parameters:

• Single-circuit device. Installation on the floor.

• Open firebox.

• Heating capacity 35,000 W.

• Efficiency – 90%.

• There is automatic ignition.

• 141 kg.

Rating of the TOP 12 best gas boilers Lemax

Leader

Equipment with cast iron heat exchangers. Their surface is silvered. At the bottom of the firebox is an injection burner. With only one circuit. 19-55 kW. They can heat from 150 to 500 m². The most expensive versions. Service life – 25 years. Automation - Nova Sit. Pressure and temperature are automatically adjusted. Can function without electricity. Due to a special turbo nozzle, the intensity of removal of combustion products increases. Leader 80 parameters:

• Weight 196 kg.
• 92% efficiency.
• Heating area 500 m².
• The maximum water temperature at the outlet is 80 °C.
• Open firebox.
• Auto-ignition.