15 best gas boilers – 2021 rating

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• What to look for when choosing a gas boiler
• The best manufacturers of gas boilers
• The best wall-mounted convection gas boilers
• The best wall-mounted condensing gas boilers
• The best floor-standing convection gas boilers for a private home
• The best floor-standing condensing gas boilers for a private home
• The best single-circuit gas boilers
• The best double-circuit gas boilers
• Let's compare the models
• Which gas boiler is better to choose?

Choosing gas boilers is difficult - they are usually sold with apartments or houses, so people simply don’t know what to look for. But what if you urgently need to purchase good equipment, but don’t have time to delve into all the design features? In fact, you don’t need a lot of knowledge to make the right choice. And having a ready-made rating of gas boilers for 2021 makes the buyer’s task easier.

What to look for when choosing a gas boiler

When choosing a gas boiler, you need to rely on the company’s reputation and its breakdown statistics. But there are also some criteria, without which it is simply impossible to find a good device. Let's try to figure out what you need to remember before purchasing gas equipment:

• Boilers are divided according to the installation method into wall-mounted and floor-mounted, so analyze where you have more space;
• The type of boiler - convection and condensation - should be selected depending on the desired price;
• The number of circuits - there are double-circuit and single-circuit boilers - affects whether the boiler can heat water;
• The greater the heating power, the better the device will work;
• The type of combustion chamber - closed or open - indicates whether a person can see how the boiler works;
• There are different sizes of boilers, so it is important to consider the area of ​​the room where it will be installed;
• High level safety is literally vital, because gas equipment can explode.

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The principle of operation of automation on old-style gas boilers

Frequent problems when heating a room with gas boilers are flame attenuation in the burner and gas pollution in the room. This happens for several reasons:

• insufficient draft in the chimney;
• too high or too low pressure in the pipeline through which gas is supplied;
• the flame on the igniter goes out;
• leakage of the pulse system.

When these situations arise, the automation is triggered to stop the gas supply and prevent the room from becoming gas-filled. Therefore, installing high-quality automation on an old gas boiler is basic safety rules when using it to heat a room and heat water.

All automation of any brand and any manufacturer has one operating principle and basic elements. Only their designs will differ. Old automatic machines “Plamya”, “Arbat”, SABC, AGUK and others work according to the following principle. When the coolant cools below the temperature set by the user, the gas supply sensor is activated. The burner starts heating the water. After the sensor reaches the user-specified temperature, the gas sensor automatically turns off.

On a note! When using modern automation, it is possible to save heat up to 30%. Old-style automation is non-volatile and does not require electricity. Its adjustment, connection and disconnection are carried out by a person. Commands are transmitted using electromagnetic pulses.

The video explains how the automation of gas boilers AOGV and KSTG works.

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The best manufacturers of gas boilers

Not all companies involved in the production of gas boilers can be trusted. The fact is that low-quality materials or the use of old technologies can negatively affect the durability of the device. But you can take a closer look at the products of the following companies:

• BAXI is a powerful European holding that appeared in 2009 and produces home appliances;
• The German company Viessmann creates cooling and heating systems for various types of buildings;
• Vaillant is licensed equipment from Germany, mainly heating boilers and regulators;
• Protherm is developing heating boilers with high efficiency, including gas boilers;
• Lemax holds the lead among Russian manufacturers of temperature control equipment;
• Buderus is a brand that has been producing boilers and other heating devices since 1731.

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A gas boiler is the main element of an autonomous heating system

An autonomous household water heating system based on a gas boiler consists of the following main parts:

• heating boiler with pump;
• automation system;
• ventilation system;
• coolant piping;
• radiators.

The main element of the heating system is a gas boiler, which provides heating and circulation of the coolant. Let's take a closer look at this unit.

Purpose and functions of gas water heating boilers

The main task of gas boilers is to heat the interior and provide hot water supply systems. Domestic autonomous boilers and gas heat generators use natural gas as fuel, supplied to the autonomous home heating system from the central main line. The use of gas heating boilers for domestic heating systems and heating systems is due to their following characteristics:

• compactness;
• gradation by performance (power);
• relative ease of installation;
• efficiency;
• efficiency;
• ease of use due to a high degree of automation.

Identical industrial equipment differs from household equipment in power, dimensions and technical equipment, therefore the operation of gas boilers for industrial purposes requires professionalism from the operating personnel and constant monitoring of the operation process of the unit.

The use of gas boilers at home should be safe, therefore the management and maintenance of these units should be simple and not require special skills from the consumer. Modern models of gas boilers, thanks to the use of special technologies in their production, fully meet the requirements.

Modern heating boilers, unlike outdated models, have an efficiency close to 90%. In addition to heating the interior, modern household gas heating equipment is capable of automatically ensuring the operation of the hot water supply system for housing.

Boilers of modern models are optimally automated; the degree of automation depends on the purpose of the unit and the performance class. The consumer market for water heating devices is represented by household appliances of various types and types. Buyers have a wide variety of models at their disposal, from powerful floor-mounted domestic boilers for heating large private houses to compact wall-mounted units for city apartments. For each type of housing and operating conditions, you can choose a boiler of the appropriate type - a single-circuit or double-circuit gas boiler, a unit with an open firebox or with a closed combustion chamber, boilers with cast iron or bimetallic heat exchangers.

Important! The high degree of automation of gas boilers has reduced the share of human participation in their operation, but has not reduced its role - fulfillment of all requirements for the safe use of gas heating equipment set out in the operating instructions is strictly necessary.

Let's compare the models

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Nuances of maintenance and connection

Now, as before, installing a gas heating boiler is not an easy task. To install such equipment you will need:

• coordinate actions with Gostekhnadzor;
• draw up a boiler connection project;
• prepare the room, connect the chimney, ensure the main gas supply to the boiler.

A number of norms and rules have been developed that will have to be followed during installation:

• you will need a ventilated room for installing the boiler, with access to the street;
• the area of ​​the room must be at least 100 m²;
• It is mandatory to install an automatic system that is responsible for gas leaks.

Gas boilers of the old type were connected to chimneys at least 5 m long, only with natural draft. These requirements were mandatory and contributed to minimal formation of condensation - the main drawback of retro devices.

Now coaxial chimneys and circulation pumps are used, so it is possible to provide forced draft and install the chimney through a wall or into a ventilation shaft, which makes installation easier and makes the chimney connection area neater. The photo shows the correct installation of the boiler.

Wall mounted boiler

The market now offers installation components and care products that extend the life of devices and increase operating efficiency.

The compact design of the new heating devices and light weight, which are especially distinguished by wall-mounted gas models, allow the device to be installed in a matter of hours, as shown in the video below, and used even in small rooms.

Which gas boiler is better to choose?

All boilers sold in online stores or in real retail outlets have the right to exist. At a minimum, because some models are inexpensive, while others cost almost six figures. Therefore, the main advice for choosing a gas boiler is that you need to choose one that can safely warm a room of a predetermined area or at the same time heat water. Be sure to check reviews about the fire hazard of the product you are purchasing and choose only one that has a clean reputation. Other favorable parameters are considered only desirable.

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Boiler design and functionality

The quality of Soviet products was in many ways superior to modern products from domestic factories. Therefore, the AGV 80 gas boiler is still in use in some homes. Most likely, everything that can be replaced has already been replaced, and only the body remains from the original product. Installing foreign components into the device can significantly increase its efficiency in accordance with current parameters for today.

A simple device allows for creativity. The boiler can be easily disassembled using a standard set of tools. Almost any devices can be attached to it, as long as they fit in the dimensions. Installing a heater and installing the entire system is no different from operations with modern devices. In the same way, it is necessary to provide direct and reverse water supply, gas supply and a chimney to remove combustion products. You can install a turbine that will draw smoke into the atmosphere.

Using Soviet technology was very easy. It had a small number of functions, and next to each button there was a large inscription by which you could navigate what this element was responsible for. The instructions for the AGV 80 gas boiler were included with the device. But she couldn’t tell anything fundamentally new.

It was only important to familiarize yourself with the connection diagram and read the section with safety precautions. Everything else could be figured out on your own within a few seconds. Nowadays, finding a paper version of the user manual will be very problematic, so you should use the Internet. Here you can easily find instructions for any type of equipment, regardless of the year of its manufacture.