TOP 12 best single-circuit gas boilers for heating a private home: 2020 rating and which condensing device to choose

Rating of the TOP 12 best single-circuit gas boilers

Place	Name	Price
TOP 4 best single-circuit gas boilers
1	Lemax Patriot-12.5	Find out the price
2	Lemax Patriot-10	Find out the price
3	BAXI ECO-4s 1.24F	Find out the price
4	Protherm Panther 25 KTO (2015) 25 kW	Find out the price
TOP 4 best single-circuit wall-mounted gas boilers
1	Vaillant turboTEC plus VU 282/5-5 28.9 kW	Find out the price
2	Lemax Premium-30N 30 kW	Find out the price
3	Lemax Leader-25N 25 kW	Find out the price
4	BAXI LUNA Platinum+ 1.24 26.1 kW	Find out the price
TOP 4 best single-circuit floor-standing gas boilers
1	Lemax Wise 25 25 kW	Find out the price
2	Lemax Wise 16 16 kW	Find out the price
3	BAXI SLIM 1.150 i 14.9 kW	Find out the price
4	Protherm Bear 30 PLO 26 kW	Find out the price

What to look for when choosing

When choosing a single-circuit gas boiler, the following basic criteria should be taken into account::

The main characteristic is thermal power . When choosing a device, we proceed from the condition that to heat a 10 m2 room, a power of 1 kW is required.
Combustion chamber type . There are open and closed cameras.
Possibility of connecting a boiler to heat water.
Control system . Boilers can have a mechanical or electronic system.
Safety . The boiler must be equipped with a reliable control system for pressure, temperature, overvoltage and automatic shutdown in the event of an emergency.
To select, you need to take into account a number of parameters: room area, ceiling height, presence of a ventilation system, thermal insulation ability of the walls. It is determined by gas consumption and the ability to maintain optimal mode.

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

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

Types of boilers by installation methods

According to installation methods, heating devices can be divided into:

Wall-mounted.
Floor-standing.

Domestic wall-mounted gas boilers are very popular for small spaces and apartment buildings. The bulk of these gas boilers are divided depending on the materials from which they are made. The production of wall-mounted units uses a copper heat exchanger, while the production of floor-standing equipment uses a cast iron heat exchanger.

The positive aspects when using a copper heat exchanger is their weight, namely the weight of such equipment will be about thirty or forty kilograms. The light weight of such a device will allow you to place it in a small room. In addition, the power of such devices is up to 35 kW, this power is quite enough for a small apartment or even for a medium-sized house.

But there is a small disadvantage in the production of such devices; their service life is limited; more information on the service line is provided by the manufacturer himself. A positive aspect in the production of such equipment is their compactness; such a small device can accommodate a pump, expansion tank, safety group and much more.

Floor-standing gas boilers with a cast iron heat exchanger, despite their longer service life, require the purchase of many additional auxiliary elements for installation and further operation. It is also worth paying attention to the weight and dimensions of the device.

The weight of equipment with a cast iron heat exchanger can be up to one hundred kilograms, and some devices can exceed one hundred and fifty kilograms. Such units take up quite a lot of space and require installation in a separate room.

The positive aspect is high-quality and long-lasting heating.

The best single-circuit gas boilers

Below is the TOP 4 of the best single-circuit gas boilers, compiled taking into account the opinions of consumers and experts in 2020. The main evaluation criteria are price, quality and reliability.

Lemax Patriot-12.5

The Lemax company offers a reliable single-circuit convection boiler Lemax Patriot-12.5 for heating rooms up to 120 m2.

It does not depend on the power supply. The combustion chamber is closed type. Mechanical control.

Installation - parapet.

The rectangular heat exchanger is made of stainless steel 2 mm thick and complies with the European standard.

It is coated with a special enamel that prevents corrosion. There is gas control and overheating protection.

A coaxial type smoke removal system is provided, and therefore there is no need for a stationary chimney.

Technical specifications:

Lemax Patriot-10

The rating of the best single-circuit boilers rightly includes the Lemax Patriot-10 model . This is a floor-standing convection-type unit with a closed combustion chamber, capable of heating a room up to 100 m2.

Mechanical control provides power and temperature control.

The heat exchanger is made of stainless steel.

Reliable gas burner equipment and automation system are provided by the Italian company SIT.

An injection type micro-flare burner is installed.

High efficiency is supported by the innovative design of turbulators that delay the release of hot gases.

There is a viewing window to monitor the combustion process, as well as an easily removable top panel for ease of maintenance.

Technical specifications:

thermal power – 10 kW;
Efficiency – 87%;
gas consumption – 0.6 m3/h;
nominal gas pressure – 13 mbar, water in the circuit – 2 bar;
maximum temperature - 80 °C;
dimensions – 59.5x74x36 cm;
weight – 50 kg.

pros

reliable gas control;
low cost;
Ease of Management;
energy independence.

Minuses

reduced power;
lack of a built-in pump;
There is no built-in expansion tank.

This model is ideal for small houses. The manufacturer provides a 3-year warranty.

BAXI ECO-4s 1.24F

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

It provides convection heating. The combustion chamber is closed type. Electronic control with the ability to adjust power over a wide range. The heat exchanger is made of copper.

Efficiency is increased by forced smoke removal using an exhaust fan.

Wall mounting.

There is a built-in expansion tank with a volume of 6 liters, which makes it possible to connect a water heater.

The modes are reflected on the display. There is weather-compensating automatic control.

The boiler is capable of operating on liquefied gas.

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

Technical specifications:

thermal power – 24 kW;
Efficiency – 93%;
gas consumption – 2.73 m3/h;
nominal gas pressure – 20 mbar, water in the circuit – 3 bar;
maximum temperature - 85 ° C;
dimensions – 40x73x30 cm;
weight – 29 kg.

pros

built-in circulation pump;
possibility of working on natural and liquefied gas;
functions of autodiagnosis, autoignition, flame modulation;
water filter;
reliable protection;
copper heat exchanger.

Minuses

dependence on electricity supply;
increased 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 Protherm Panther 25 KTO boiler (2015) for heating houses and cottages up to 250 m2.

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

Electronic control provides regulation of power and coolant temperature.

Protection against overheating, freezing, and pump blocking is provided. There is a built-in circulation pump that operates quietly.

The necessary information is constantly displayed on the liquid crystal display.

The built-in chimney does not require an additional smoke removal system.

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

The kit includes a recirculation device.

Technical specifications:

thermal power – 25 kW;
gas consumption – 2.8 m3/h;
nominal gas pressure – 13-20 mbar, water in the circuit – 3 bar;
maximum temperature - 85 ° C;
dimensions – 44x80x34 cm;
weight – 41 kg.

pros

possibility of working on liquefied gas;
built-in expansion tank with a volume of 10 l;
convenient display;
possibility of connecting external control.

Minuses

energy dependence;
significant gas consumption;
increased cost.

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

Strapping functions

Piping is a set of instruments, devices, and pipelines used to transfer coolant to heating radiators. Its structure includes the entire heating system, excluding radiators.

Any gas equipment is potentially dangerous. Installation errors lead not only to problems with heating the home, but also to an explosive situation. When drawing up the project and installation, it is necessary to strictly comply with the safety requirements and standards of SNiP 41-01-2003 “Heating, ventilation and air conditioning”.

The selection of the scheme depends on the type of boiler being installed, the structural and functional features of the building, and the type of heat supply system. The scheme needs to be planned in advance, the optimal points for installing equipment must be selected, and the nuances of pipeline arrangement must be determined.

The boiler is the main element of the heating system

The harness performs the following important functions:

Pressure control. With a properly arranged piping, thermal expansion is leveled out, therefore, the pressure will not reach dangerous values.
Prevent airing. Plugs in the pipeline are formed due to air bubbles. Heating efficiency decreases since the batteries do not heat up completely with constant fuel consumption.
Preventing blockages. If the boiler is not properly installed in pipes and batteries, there is a high risk of rust and scale formation. The presence of even small particles of debris in a liquid leads to contamination of the entire system. This leads to an increase in fuel consumption and, accordingly, costs for heat supply with a loss of its quality.
Connecting additional circuits. It is allowed to install a “warm floor” and a storage boiler.

The quality of heating a house depends on the method of connecting the gas heater to pipes and other elements, therefore the piping plan must be selected and developed in advance.

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. This makes it possible to significantly save usable space. Below is the TOP 4 of such devices at the beginning of 2020.

Vaillant turboTEC plus VU 282/5-5 28.9 kW

One of the best wall-mounted models is the Vaillant turboTEC plus VU 282/5-5 single-circuit boiler, designed for heating rooms up to 290 m2.

It has a closed turbocharged combustion chamber with a modulating burner made of chromium-nickel steel. Electronic control, push-button with the ability to regulate water temperature.

The heat exchanger is made of copper . There is a display. Combustion products are forcibly removed by a fan through a special, certified system.

Additionally, you can install various types of water heaters.

The installed software allows you to control modes, configure parameters, and perform self-diagnosis.

Technical specifications:

thermal power – 28.9 kW;
Efficiency – 91%;
gas consumption – 3.2 m3/h;
nominal gas pressure – 13-20 mbar, water in the circuit – 3 bar;
maximum temperature - 85 ° C;
dimensions – 44x80x33.8 cm;
weight – 44 kg.

pros

auto diagnostics;
possibility of connecting external control;
modulating burner with adjustable power;
intelligent pressure control system;
embedded software.

Minuses

increased cost;
significant gas consumption.

The boiler is highly reliable and efficient, which justifies the increased price.

Lemax Premium-30N 30 kW

A worthy place in the ranking is given to the Lemax Premium-30N model, capable of heating an area of 300 m2.

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

It has an open combustion chamber with a Polidoro micro-torch injection burner.

The boiler is single-circuit, but you can connect a boiler and a room thermostat . The heat exchanger is made of stainless steel that meets European and American standards.

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

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

A smooth start is ensured through a special system. You can switch to working with liquefied gas.

Technical specifications:

thermal power – 30 kW;
Efficiency – 90%;
gas consumption – 1.75 m3/h;
nominal gas pressure – 13-20 mbar, water in the circuit – 3 bar;
maximum temperature - 90 °C;
dimensions – 96x47x55.6 cm;
weight – 80 kg.

pros

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

Minuses

no built-in expansion tank;
lack of “summer” mode.

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

Lemax Leader-25N 25 kW

Another excellent unit from the Lemax company is the Lemax Leader-25N single-circuit convection-type boiler for heating houses with an area of up to 150 m2.

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

Boiler designed for natural gas.

An improved system of protection against overheating, soot formation, flame blowing out, and traction termination has been used.

A system for forced removal of combustion products is provided . Maintenance is simplified due to the presence of an easily removable lining.

Technical specifications:

thermal power – 25 kW;
Efficiency – 90%;
gas consumption – 3 m3/h;
nominal gas pressure – 13 mbar, water in the circuit – 4 bar;
maximum temperature - 95 ° C;
dimensions – 51.5x85.6x51.5 cm;
weight – 115 kg.

pros

energy independence;
real cost;
adaptation to Russian conditions;
reliable protection;
Ease of Management.

Minuses

mechanical control;
heavy weight;
no autodiagnostics.

Among units of significant performance, the model is distinguished by its simplicity, reliability and affordable price.

BAXI LUNA Platinum+ 1.24 26.1 kW

One of the leaders in the rating of the best gas boilers is the BAXI LUNA Platinum+ 1.24 model for rooms up to 260 m2.

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

Electronic control . The modes are shown on the display. It displays temperature, pressure, error code, operating parameters, flame state

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

Programs are provided for weekly programming of work, setting up seasonal work.

Weather-compensating automation is enabled. An ntc sensor is installed for the safe removal of combustion products. Power modulation is provided (1:10).

Technical specifications:

thermal power – 26.1 kW;
gas consumption – 2.6 m3/h;
nominal gas pressure – 5-20 mbar, water in the circuit – 4 bar;
maximum temperature - 90 °C;
dimensions – 45x76x34.5 cm;
weight – 34.5 kg.

pros

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

Minuses

high price.

The model captivates with its reliable electronics, fine adjustment and safety, which compensates for the high cost.

The best single-circuit floor-standing gas boilers

Floor-mounted gas boilers have increased power, which makes it possible to heat large houses. Below is the TOP 4 of such single-circuit units.

Lemax Wise 25 25 kW

The Lemax Wise 25 model is distinguished by its high quality for heating rooms up to 250 m2 . This is a convection type gas boiler with an open combustion chamber.

Control is provided electronically. The heat exchanger is made of cast iron 4 mm thick and has a volume of 14 liters.

The unit is equipped with an autodiagnostic system . Protection against overheating, traction interruption and freezing is provided.

Provides smooth flame modulation in continuous mode. You can connect a room thermostat, boiler, external control unit.

The boiler operates normally even with a minimum volume of water . Coolant circulation can be natural or forced.

Technical specifications:

thermal power – 25 kW;
Efficiency – 90%;
gas consumption – 1.5 m3/h;
nominal gas pressure – 6-25 mbar, water in the circuit – 3 bar;
maximum temperature - 95 ° C;
dimensions – 51.5x86x52 cm;
weight – 116 kg.

pros

runs on natural and liquefied gas;
convenient display;
possibility of external control;
economical gas consumption.

Minuses

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 shortcomings in their reviews.

Lemax Wise 16 16 kW

In the Lemax line of gas boilers, the single-circuit model Lemax Wise 16 stands out for heating houses up to 160 m2.

Its design is largely similar to the previous model.

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

Has electronic flame modulation.

Provides control of an external water heater.

The device is able to operate stably at low gas inlet pressure and significant differences in electrical voltage.

You can switch to liquefied gas.

Technical specifications:

thermal power – 16 kW;
Efficiency – 90%;
gas consumption – 0.96 m3/h;
nominal gas pressure – 6-20 mbar, water in the circuit – 3 bar;
maximum temperature - 90 °C;
dimensions – 43x86x52 cm;
weight – 96 kg.

pros

high-strength heat exchanger with anti-corrosion coating;
precise adjustment and maintenance of the regime;
availability of economy mode “summer”;
affordable price.

Minuses

lack of a built-in pump;
energy dependence.

When installing a boiler, the model is capable of providing hot water supply.

BAXI SLIM 1.150 i 14.9 kW

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

This is a floor-standing unit with an open-type combustion chamber and a burner with smooth power adjustment.

It has a built-in 10 liter expansion tank. The primary heat exchanger is sectional, cast iron. Electronic control. The chimney provides natural draft.

High-speed built-in pump allows you to create forced circulation of coolant.

There is a flame monitoring probe using an ionization electrode.

To prevent boiling, the device is automatically turned off (on).

The autodiagnostic system monitors the occurrence of failures.

Technical specifications:

thermal power – 14.9 kW;
Efficiency – 89.5%;
gas consumption – 1.74 m3/h;
nominal gas pressure – 6-20 mbar, water in the circuit – 3 bar;
maximum temperature - 85 ° C;
dimensions – 36x85x52 cm;
weight – 93 kg.

pros

built-in expansion tank;
adjustment over a wide range;
possibility of working on natural and liquefied gas;
can work on a “warm floor” system.

Minuses

energy dependence;
increased gas consumption.

The unit receives very flattering reviews in terms of reliability and safety.

Protherm Bear 30 PLO 26 kW

A high-quality Slovak floor-standing boiler Protherm Medved 30 PLO for heating residential and industrial premises with an area of up to 260 m2 has appeared on the Russian market.

It has an open combustion chamber. The sectional heat exchanger is made of Czech-made cast iron.

You can install a fan for forced removal of combustion products and an external water heater.

There is a display that shows the continuous operation mode.

The heat exchanger is protected from condensation. The boiler is automatically ignited using piezoelectric elements.

Two-stage power adjustment.

Technical specifications:

thermal power – 26 kW;
Efficiency – 90%;
gas consumption – 3 m3/h;
nominal gas pressure – up to 30 mbar, water in the circuit – 3 bar;
maximum temperature - 90 °C;
dimensions – 42x88x60 cm;
weight – 110 kg.

pros

convenient automatic ignition;
reliable gas control and protection system;
durable two-pass heat exchanger of 4 sections;
"winter-summer" mode.

Minuses

energy dependence;
There is no built-in expansion tank.

Despite the significant cost, the unit is popular, which is ensured by its durability and high build quality.

Products

This manufacturer produces gas boilers with a steel or copper heat exchanger under the Neva Lux brand. The products are equipped with a wide range of control and security options.

The range includes devices with power from 10 to 35 kW. Single-circuit units are characterized by ease of control and energy independence. The domestic wall-mounted double-circuit gas boiler is equipped with a second flow-type circuit, which provides hot water supply. Such models have a bithermal heat exchanger, a coaxial or conventional chimney, and an open or closed combustion chamber. Below is a video review of the Neva Lux boiler.

The manufacturer takes into account the possibility of connecting the unit to an external thermostat, which makes it possible to save fuel when the air temperature rises.

The products are equipped with a liquid crystal display, which makes it convenient to set temperature conditions and check the operation of the device components. Let's look at the characteristics of the most popular Neva Lux models.

Neva Lux 8618

The single-circuit boiler Neva Lux 8618 can serve not only for heating; hot water can be organized using an indirect heating boiler. This unit is the cheapest of the entire model range (16,000 rubles) and has non-volatile automation. It has the following characteristics:

small sizes;
weight – 15 kg;
open combustion chamber;
power 18 kW;
equipped with a circulation pump, a copper heat exchanger and a fan for forced smoke removal;
Possibility of connecting a room thermostat.

The presented unit can be connected to a three-way tap, heated floors and, thus, made into a multifunctional system.

Neva Lux 7211

The Neva Lux double-circuit wall-mounted gas boiler is equipped with a bithermal heat exchanger and electric ignition. The unit has the following characteristics:

power 11 kW;
closed combustion chamber;
weight – 34 kg;
equipped with a copper primary heat exchanger, a 6-liter expansion tank;
DHW capacity – 9 l/min when heated to 25°C;
safety devices: gas control, autodiagnostics, overheating and freezing protection, air vent, pump blocking protection.

Note! The presented model is perfect for apartments and small country houses.

Classification of single-circuit gas boilers

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

Depending on the installation method, the following types are distinguished::

Wall-mounted boilers . They are mounted on the wall using special brackets. They are small in size and weight, but their power is limited.
Floor standing boilers . Installed on an equipped platform on the floor. The main advantage is increased power. They can be heavy and require a separate room for installation.

Depending on the heat exchanger material, boilers have the following varieties::

Steel . Some grades of stainless steel are used.
Copper . These heat exchangers are characterized by high heat transfer and efficiency. Boilers are high-cost equipment.

Based on the method of heating the coolant, these types of boilers are distinguished::

Convection . The coolant in the exchanger is heated using a gas burner.
Condensation . 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 specific operating conditions.

Pipe selection

To insert a gas boiler and perform wiring, it is recommended to use metal-plastic or PP pipes. In terms of their characteristics, they are not inferior to copper or galvanized ones, installation is quite simple, and the cost is lower.

The wiring for heating radiators is made with metal-plastic pipes using press fittings or polypropylene pipes with aluminum reinforcement. The disadvantage of press fittings is their sensitivity to the quality of installation: at the slightest inaccuracy in placement, leakage occurs. A polypropylene pipeline elongates when exposed to temperatures above 50 °C. Both metal-plastic and polyethylene pipes are suitable for installing “warm floors”.

Differences between single-circuit and double-circuit boilers

Gas boilers can have 1 or 2 independent coolant circuits.

The single-circuit option is intended only for heating the house.

Coolant is supplied to the boiler, and the heat exchanger is included in the autonomous power supply system.

A dual-circuit unit has 2 independent circuits for coolant circulation.

One of them is intended for heating the room, and the second is for heating water, i.e. hot water supply. Such boilers have increased power and dimensions.