Top 12 best single-circuit gas boilers: rating 2021-2022 and which one to choose for heating a private home

In the gasified regions of the country, gas boilers are recognized as effective and economical sources of heat.

When arranging an autonomous heating system in a private house or cottage, it is enough to install a device with a single heating circuit, designed specifically for heating the room.

The rating of single-circuit gas boilers 2021-2022 helps to choose the best model out of the many proposals.

Rating TOP 12 best single-circuit gas boilers 2021-2022

Place	Name	Price
Top 4 best single-circuit gas boilers
1	Lemax Patriot-12,5	Learn the price
2	Lemax Patriot-10	Learn the price
3	BAXI ECO-4s 1.24F	Check out the price
4	Protherm Panther 25 KTO (2015) 25 kW	Learn the price
Top 4 best single-circuit wall mounted gas boilers
1	Vaillant turboTEC plus VU 282/5-5 28.9 kW	Learn the price
2	Lemax Premium-30N 30 kW	Learn the price
3	Lemax Leader-25N 25 kW	Learn the price
4	BAXI LUNA Platinum+ 1.24 26.1 kW	Learn the price
Top 4 best single-circuit floor gas boilers
1	Lemax Wise 25 25 kW	Learn the price
2	Lemax Wise 16 16 kW	See price
3	BAXI SLIM 1.150 i 14.9 kW	Check out the price
4	Protherm Bear 30 PLO 26 kW	Check out the price

What you need to pay attention to when choosing

When selecting a single circuit gas boiler you should consider the following key criteria:

The main characteristic - thermal capacity. When choosing the appliance, it is assumed that to heat a 10 m² room needs the power of 1 kW.
Type of combustion chamber. There are open and closed combustion chambers.
The ability to connect the boiler for water heating.
control system. Boilers can have a mechanical or electronic system.
Safety. The boiler must be equipped with a reliable system of pressure control, temperature control, overvoltage and automatic shutdown in case of an abnormal situation.
To select a number of parameters must be taken into account: the area of the room, ceiling height, availability of ventilation system, insulating capacity of walls.
It is determined by the gas flow rate and the ability to maintain an optimal mode.

When choosing a device, it is important to pay attention to the manufacturer.

Gas boilers from such companies as BAXI, Buderus, Vaillant, Navien, Bosch, Protherm, Ariston have high reliability, quality and safety.

The best single-circuit gas boilers

Below are the top 4 best single-circuit gas boilers, based on the opinions of consumers and experts in 2021-2022. The main evaluation criteria are price, quality and reliability.

Lemax Patriot-12,5

Lemax company offers a reliable single-circuit boiler of convection type Lemax Patriot-12,5 for space heating up to 120 m².

It does not depend on electricity supply. The combustion chamber of the closed type. Control is mechanical.

Installation - parapet.

Rectangular heat exchanger is made of stainless steel thickness of 2 mm and meets European standards.

It is covered with special enamel, preventing corrosion. There is a gas control and protection against overheating.

A coaxial chimney system is provided, so there is no need for a fixed chimney. This is one of the highest quality models for 2021-2022.

Technical parameters:

Thermal power - 12,5 kW;
EFFICIENCY - 87%;
gas flow rate - 0,75 m³/ч;
nominal pressure of gas - 13 mbar, water in the circuit - 2 bar;
maximum temperature - 80 °С;
dimensions - 59,5х74х36 cm;
mass - 50 kg.

Advantages of

complete noiselessness;
high reliability;
high-quality assembly:
ease of operation;
reasonable price.

Disadvantages

mechanical control system;
no circulation pump.

In its class, the model is recognized as one of the best, as it well combines reliability and price.

Lemax Patriot-10

In the rating of the best single-circuit boilers rightly includes the model Lemax Patriot-10. It is Floor standing unit convection type with a closed combustion chamber, able to heat a room of up to 100 meters².

The control is mechanical and provides power and temperature adjustment.

The heat exchanger is made of stainless steel.

Reliable gas burner equipment and automation system provides Italian company SIT.

Micro flare burner injector type is installed.

High efficiency is supported by an innovative design of turbulators, delaying waste hot gases.

A viewing window is provided to control combustion process and easily removable top panel for easy maintenance.

Technical parameters:

Thermal power - 10 kW;
EFFICIENCY - 87%;
gas flow - 0,6m³/ч;
nominal pressure of gas - 13 mbar, water in the circuit - 2 bar;
maximum temperature - 80 °С;
dimensions - 59,5х74х36 cm;
mass - 50 kg.

Advantages of

reliable gas control;
low cost;
easy control;
energy-independence.

Minuses

reduced power;
No built-in pump;
no built-in expansion tank.

For small houses this model is ideal. The manufacturer gives a warranty of 3 years.

BAXI ECO-4s 1.24F

Among the best household gas boilers stands out BAXI ECO-4s 1.24F for rooms area up to 240 m².

It provides convection heating. The combustion chamber is of closed type. Control is electronic with the possibility of adjusting the output in a wide range. The heat exchanger is made of copper.

Efficiency increases at the expense of forced smoke exhaust with the help of the exhaust fan.

Wall mounting.

There is an integrated expansion tank of 6 liters, which makes it possible to connect a water heater..

Modes are displayed. There is a weather-dependent automatic.

The boiler is capable of working on liquefied gas.

The functionality is extended by connecting a room thermostat and a programmable timer.

Technical parameters:

Thermal power - 24 kW;
EFFICIENCY - 93%;
gas flow rate - 2,73 m³/ч;
nominal gas pressure - 20 mbar, water in the circuit - 3 bar;
maximum temperature - 85 °С;
dimensions - 40х73х30 cm;
mass - 29 kg.

Advantages of

built-in circulating pump;
Possibility to use natural and liquefied gas;
auto-diagnosis, auto-ignition, flame modulation functions;
water filter;
reliable protection;
copper heat exchanger.

Disadvantages

dependence on electrical supply;
higher cost.

The model has high reliability and increased power with small dimensions and wall mounting.

Protherm Panther 25 KTO (2015) 25 kW

A subsidiary of the Vaillant Group offers a reliable and safe boiler Protherm Panther 25 KTO (2015) for heating houses and summer houses up to 250 m².

It is a convection type unit with a closed chamber and copper heat exchanger, wall mounted.

Electronic control provides power and temperature control of the heating medium.

Provides protection against overheating, freezing, pump blockage. There is a built-in circulation pump, which operates without noise.

The liquid crystal display constantly shows the necessary information.

The integrated chimney system does not require any additional fume extraction.

The heat exchanger provides optimal water circulation, which reduces the inertia and increases efficiency.

The kit includes a recirculation device.

Technical parameters:

Thermal power - 25 kW;
gas flow rate - 2,8 m³/ч;
nominal pressure of gas - 13-20 mbar, water in the loop - 3 bar;
Maximum temperature - 85 ° C;
dimensions - 44х80х34 cm;
weight - 41 kg.

Advantages of

the ability to work on liquefied gas;
built-in expansion tank of 10 liters;
easy-to-use display;
external control can be connected.

Disadvantages

energy dependence;
the considerable expense of gas;
increased cost.

The model is fully adapted to Russian conditions, and the price is quite in its class.

The best single-circuit wall-mounted gas boilers

When arranging your own heating in a private home, special attention is paid to boilers that can be mounted on the wall. Thus it is possible to significantly save the useful area of the room. Below are the top 4 of such devices at the beginning of 2021-2022.

Vaillant turboTEC plus VU 282/5-5 28.9 kW

One of the best models of the wall-mounted version is considered a single-circuit boiler Vaillant turboTEC plus VU 282/5-5, designed to heat premises with area up to 290 m².

It has a closed combustion chamber of the turbine type with a modulating burner of chrome-nickel steel. It is controlled electronically, with push-button control of the water temperature.

Heat exchanger made of copper.. There is a display. The combustion products are discharged by a forced ventilator through a special, certified system.

In addition, it is possible to install various types of water heaters.

Installed software allows you to control modes, set parameters, to carry out self-diagnosis.

Technical parameters:

Thermal power - 28,9 kW;
EFFICIENCY - 91%;
gas consumption - 3,2 m³/ч;
nominal pressure of gas - 13-20 mbar, water in the circuit - 3 bar;
maximum temperature - 85 ° C;
dimensions - 44x80x33,8 cm;
weight - 44 kg.

Advantages of

self-diagnostics;
Possibility to connect external control;
modulating burner with adjustable capacity;
system of intellectual pressure control;
built-in software.

Minuses

higher cost;
considerable gas consumption.

The boiler is characterized by high reliability and efficiency, which is quite justified by the increased price.

Lemax Premium-30N 30 kW

Worthy place in the rating is given to the model Lemax Premium-30N, which can heat 300 square meters.².

This model is assembled in the Russian Federation, but it is equipped with Italian automatics. It is designed for floor installation.

It has an open combustion chamber with a Polidoro micro-flame injector burner.

The boiler is single-circuit, but it is possible to connect a boiler and a room thermostat. The heat exchanger is made of stainless steel according to European and American standards.

The temperature regulator has a scale and is placed on the front panel.

A Comfort SE turbo nozzle is provided for forced draining of combustion products..

Soft-start through a special system. Can be switched to liquefied gas.

Technical parameters:

Thermal power - 30 kW;
EFFICIENCY - 90%;
gas flow rate - 1,75 m³/ч;
nominal pressure of gas - 13-20 mbar, water in the circuit - 3 bar;
maximum temperature - 90 ° C;
dimensions - 96x47x55,6 cm;
weight - 80 kg.

Advantages of

affordable price;
energy-independence;
economical gas consumption;
reliable automation and electronics;
corrosion-resistant coating of the heat exchanger.

Disadvantages

no built-in expansion tank;
absence of a mode "summer".

With a sufficiently high thermal capacity boiler has a reasonable price, which is especially noted by consumers.

Lemax Leader-25N 25 kW

Another excellent unit from the company Lemax - single-circuit boiler Lemax Leader-25N convection type boiler for heating homes up to 150 square meters.².

It has an open combustion chamber, and the heat exchanger is made of cast iron with corrosion-resistant coating. The control is mechanical. Nova automatics is installed.

Boiler is designed for natural gas.

Applied advanced system of protection against overheating, soot formation, blowing out of the flame, the termination of the draft.

There is a system of forced evacuation of combustion products. Servicing is simplified by the availability of easily removable cover.

Technical parameters:

Thermal power - 25 kW;
EFFICIENCY - 90%;
gas flow rate - 3 m³/ч;
nominal gas pressure - 13 mbar, water in the circuit - 4 bar;
maximum temperature - 95 °С;
dimensions - 51,5х85,6х51,5 cm;
weight - 115 kg.

Advantages of

energy-independence;
actual cost;
adaptation to Russian conditions;
reliable protection;
easy control.

Disadvantages

mechanical control;
big weight;
No auto-diagnostics.

Among the units of significant capacity, the model is characterized by simplicity, reliability and affordable price.

BAXI LUNA Platinum+ 1.24 26.1 kW

One of the leaders of the rating of the best gas boilers is the model BAXI LUNA Platinum + 1.24 For the premises with the area up to 260 m².

This condensing boiler has a closed combustion chamber. The heat exchanger is made of stainless steel.

Control is electronic. Modes are shown on the display. It shows temperature, pressure, error code, operating parameters, flame status

There is a built-in circulation pump and 8-liter expansion tank.

There are programs for weekly programming of operation, seasonal operation settings.

Enabled weather-dependent automatics. An ntc sensor for safe disposal of combustion products is installed. Power modulation (1:10).

Technical parameters:

Thermal power - 26,1 kW;
gas flow rate - 2,6 m³/ч;
nominal gas pressure - 5-20 mbar, water in the circuit - 4 bar;
Maximum temperature - 90 °С;
dimensions - 45х76х34,5 sm;
weight - 34,5 kg.

Advantages of

reliable electronic control;
remote control;
auto-diagnostics and auto-ignition;
the possibility of wall installation;
quality water filter.

Minuses

high price.

The model conquers with its reliable electronics, fine regulation and safety, which makes up for the high cost.

The best single-circuit floor standing gas boilers

Gas boilers in the floor version have an increased capacity, which gives the opportunity to heat a large area of the house. Below is the top 4 of such single-circuit units.

Lemax Wise 25 25 kW

Lemax Wise 25 model for heating premises up to 250 m is of high quality.². This is a gas boiler of convection type with an open combustion chamber.

Control is provided by electronics. The heat exchanger is made of cast iron with a thickness of 4 mm and has a volume of 14 liters.

The unit is equipped with an auto-diagnostics system. Provides protection against overheating, draft interruption and freezing.

Smooth modulation of the flame in continuous mode. You can connect a room thermostat, boiler, external control unit.

Boiler works properly even with a minimum volume of water. The circulation of the water can be natural or forced.

Technical parameters:

thermal capacity - 25 kW;
EFFICIENCY - 90%;
gas flow rate - 1,5 m³/ч;
nominal gas pressure - 6-25 mbar, water in the circuit - 3 bar;
maximum temperature - 95 °С;
dimensions - 51,5x86x52 cm;
weight - 116 kg.

Advantages of

Natural and liquefied gas operation;
user-friendly display;
possibility of external control;
economical gas consumption.

Disadvantages

Lack of built-in expansion tank;
energy dependence;
heavy weight.

As a floor standing boiler, this model suits the vast majority of buyers, who do not note any disadvantages in their reviews.

Lemax Wise 16 16 kW

In the line of gas boilers of the company Lemax stands out a single-circuit model Lemax Wise 16 for heating houses with an area of up to 160 m².

Its design is largely similar to the previous model.

Reliable control is provided by the Italian automation from the company SIT, and the micro flare burner is provided by the company POLIDORO. A Viadrus cast iron heat exchanger is installed.

There is an electronic modulation of the flame.

External water heater control is provided.

The unit is capable of stable operation at low gas inlet pressure and significant voltage fluctuations.

Can be switched to liquefied gas.

Technical parameters:

Thermal power - 16 kW;
EFFICIENCY - 90%;
gas flow rate - 0,96 m³/ч;
nominal pressure of gas - 6-20 mbar, water in the circuit - 3 bar;
maximum temperature - 90 ° C;
dimensions - 43x86x52 cm;
weight - 96 kg.

Advantages of

High-strength heat exchanger with corrosion-resistant coating;
Precise adjustment and maintenance mode;
economical mode "summer";
affordable price.

Disadvantages

absence of the built in pump;
energy dependence.

The model is able to provide hot water if the boiler is installed.

BAXI SLIM 1.150 i 14.9 kW

The gas single boiler BAXI SLIM 1.150 i is of the highest quality for Rooms up to 150 m².

It is a floor standing unit with an open combustion chamber and a continuously adjustable burner.

It has a built-in 10 l expansion tank. The primary heat exchanger is a sectional, cast iron one. Control is electronic. The chimney provides a natural draught.

Built-in high-speed pump allows to create a forced circulation of the coolant.

A flame control probe with an ionization electrode.

To prevent boiling there is an automatic shutdown (inclusion) of the unit.

The auto-diagnostics system monitors the appearance of failures.

Technical parameters:

Thermal power - 14,9 kW;
EFFICIENCY - 89.5%;
gas flow rate - 1,74 m³/ч;
nominal gas pressure - 6-20 mbar, water in the circuit - 3 bar;
maximum temperature - 85 ° C;
dimensions - 36x85x52 cm;
mass - 93 kg.

Advantages of

built-in expansion tank;
wide range of regulation;
Possibility to work on natural gas and liquefied gas;
can work on the system "underfloor heating".

Minuses

energy dependence;
higher gas consumption.

In terms of reliability and safety, the unit receives very flattering reviews.

Protherm Medved 30 PLO 26 kW

On the Russian market appeared a high-quality Slovak floor boiler Protherm Medved 30 PLO for heating residential and industrial premises up to 260 m in area².

It has an open combustion chamber. Sectional heat exchanger is made of cast iron of Czech production.

It is possible to install a fan for forced evacuation of combustion products and an external water heater.

Provides a display, which displays the operation mode in continuous mode.

There is a protection of the heat exchanger from condensation. Automatic ignition of the boiler is made by means of piezo cells.

The power regulation is two-stage.

Technical parameters:

thermal capacity - 26 kW;
EFFICIENCY - 90%;
gas flow rate - 3 m³/ч;
nominal gas pressure - up to 30 mbar, water in the circuit - 3 bar;
maximum temperature - 90 °С;
dimensions - 42х88х60 cm;
weight - 110 kg.

Advantages of

convenient auto ignition;
Reliable gas control and protection system;
Durable two-way heat exchanger of 4 sections;
Winter-summer mode.

Cons

power dependence;
No built-in expansion tank.

Despite the significant cost, the unit is popular, which is provided by durability and high quality of assembly.

Classification of single-circuit gas boilers

Single-circuit gas boilers are classified according to several criteria.

According to the method of installation, the following types are distinguished:

Wall mounted boilers. They are mounted on the wall with special brackets. They are characterized by small size and weight, but their capacity is limited.
Floor standing boilers. They are installed on the equipped platform on the floor. The main advantage is the increased power. They can have a lot of weight, and for their installation you need a separate room.

According to the material of the heat exchanger, the boilers are of the following varieties:

Steel. Some varieties of stainless steel are used.
Copper .. These heat exchangers are characterized by high heat output and efficiency. Boilers belong to the equipment with a high cost.

According to the method of heating the coolant are the following types of boilers:

Convection .. The coolant in the exchanger is heated with a gas burner.
Condensing. The principle of two-stage heating is used.

When choosing a gas boiler, you should carefully consider the pros and cons of different types of devices, taking into account the specific operating conditions.

Differences between a single-circuit and double-circuit boiler

Gas boilers can have 1 or 2 independent circuits for the coolant.

Single-circuit variant is designed only for home heating.

The boiler is supplied with coolant, and the heat exchanger is included in the autonomous power system.

Two-circuit unit has 2 independent circuits to circulate the coolant.

One of them is designed for space heating, and the second - for water heating, i.e. hot water supply. Such boilers have an increased power and dimensions.

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