The best single-circuit condensing boilers

The Hotpoint-Ariston Clas One System 24 RDC condensing boiler is designed for indoor wall mounting. It can heat an apartment, house or office with a total area of up to 195 m². The device is not only economical (typical of all boilers of this type), but also flexible in settings. The modulating burner (with smooth power change) instantly responds to temperature changes, precisely adjusting to current needs. The temperature of the coolant can be changed in the range from 35 °C to 82 °C. Management is carried out with the help of regular bodies located on the front panel, or a remote module (in case the boiler is integrated into the "smart home" system).

Hotpoint-Ariston heating boilers are considered reliable equipment. This model, for example, has a 10-year warranty on the heat exchanger (because it is made of high-quality stainless steel). The durability of the fan and the two-speed circulation pump is ensured by automation, which is configured in such a way as to reduce the number of boiler on-off cycles.

Hotpoint-Ariston pays a lot of attention to the appearance of home appliances. This device is no exception. It looks more stylish than other boilers (which usually have a very utilitarian appearance). Therefore, Hotpoint-Ariston Clas One System 24 RDC will easily fit into a kitchen with a renovation in a modern style. It is also useful to know that you can easily buy any accessories for this model: from indoor and outdoor temperature sensors to kits for converting a condensing boiler to propane.

With a useful power of 26.5 kW and the ability to heat the coolant up to 75 ° C, the single-circuit condensing boiler Protherm Lynx Condens 25 MKO can heat residential and office premises up to 212 m². The design of the device provides the ability to connect to a coaxial or separate chimney. Inside the case there is a two-stage pump that circulates water through the heating system, and an 8-liter expansion tank. The cast heat exchanger is made of silumin. This design is not ideal in terms of efficiency (the declared efficiency of this boiler is 104% - a couple of percent less than other manufacturers of similar equipment). But it provides high reliability of the heat exchanger, makes the boiler more durable, easier to operate and less demanding for maintenance.

There is a display on the front wall of the case. It displays the most important parameters of the device, as well as errorsif they are suddenly detected by the built-in diagnostic system. The equipment is equipped with several protection systems (which control the flame, gas pressure, draft and water circulation in the circuit), so even users who are completely inexperienced in technology will not have problems. Due to the presence of the eBus bus, this boiler can be equipped with additional automation (it is recommended to use inexpensive proprietary Protherm controllers) and integrated into complex heating systems.

Protherm is a Czech company with a plant in Slovakia. It is a "budget" division of Vaillant, one of the world's leading manufacturers of heating equipment. Boilers of this brand are famous for being less "capricious" than the equipment of "promoted" brands, and more consistent with the realities of Eastern European cities. Therefore, buying Protherm Lynx Condens 25 MKO is the right decision if you need a reliable boiler that is unpretentious in terms of water and gas quality.

BAXI Duo-tec Compact 1.24 is designed for heating apartments or private houses up to 180 m². Among other wall-mounted single-circuit condensing boilers, it stands out for its flexibility in settings. Thanks to the technology of continuous electronic modulation of the burner, the device can accurately maintain a constant temperature of the coolant in a very wide range: from 25 ° C to 80 ° C. Therefore, this boiler can be used not only for heating a house using conventional radiators, but also put in heating systems such as "warm floor". Moreover, it is equipped with a built-in climate controller with an outside temperature sensor.

Although Baxi heating equipment is not considered premium, this boiler is in no way inferior to more expensive counterparts in terms of the quality of the "stuffing". Its “insides” (burner and primary heat exchanger) are made of high quality AISI 316L stainless steel, which ensures the reliability and durability of the equipment. The hydrogroup is made of composite materials. The "brain" of the boiler is a microprocessor that controls precision automation. Thanks to this selection of components, good efficiency is ensured (gas consumption in maximum power mode is 2.61 m³ / h - an excellent result for heating equipment of this class).

The BAXI Duo-tec Compact 1.24 boiler is equipped with a powerful circulation pump capable of driving the coolant through the heating circuit of a two-story cottage. It sells a large number of "native" thermostatic controllers, interface boards, sensors and other accessories. The manufacturer separately emphasizes the possibility of seamless connection of this boiler to solar panels and integration into the "smart home" system.

Vaillant ecoTEC plus VU INT 166/5-5 has a fairly modest heat output of 14 kW. Therefore, it is designed not so much for private houses as for apartments. This unit can heat rooms up to 112 m². It, like other boilers with a closed combustion chamber and forced gas exhaust, can be installed in residential premises. It is only necessary to comply with all the requirements necessary for the installation of condensing boilers. They consist in the presence of a socket, a coaxial chimney, as well as the ability to connect the device to the sewer to drain condensate.

“Under the hood” of this boiler is a durable stainless steel heat exchanger, an expansion tank of 10 liters, a two-stage circulation pump, three-way valves and a built-in siphon. Access to the "insides" for their maintenance is carried out from the front, so the boiler can be installed even in a corner, even in a niche. Automation deftly controls the modulating burner, which can change the power in the range from 20% to 100%. Therefore, the boiler easily adapts to changing loads and adapts to different weather conditions. It is equipped with protective systems for all occasions and is completely safe. Therefore, even those who are not friends with technology will feel calm.

Thanks to modest technical characteristics, Vaillant ecoTEC plus VU INT 166/5-5 consumes little gas - no more than 1.7 m³ / h when operating at full capacity. But it should be noted that the ratio of price and power is far from being the most favorable. The fact is that Vaillant is considered a “premium” brand. Heating boilers of this brand are distinguished by high reliability of all components and assemblies and well-coordinated work of mechanics with electronics, thanks to which the equipment works like clockwork. This is why Vaillant condensing boilers have a long service life and are trouble-free.

WOLF FGB-28 is an efficient gas boiler designed to heat water circulating through the home heating circuit. Thermal power of 27.3 kW allows the use of this unit for heating homes and offices up to 218 m². Thanks to the carefully thought-out design of the chamber, which ensures the most complete combustion of gas fuel, and the condensing principle of operation, the WOLF FGB-28 boiler is considered one of the most economical in its power class. Working at full load, it consumes only 2.63 cubic meters of gas per hour.

In addition to efficiency, this boiler is distinguished by high reliability of components and assemblies, which ensures uninterrupted operation of the heating system. It has copper piping and a cast aluminum alloy heat exchanger, while the hydraulic block is made of composite materials. Built-in safety systems protect the equipment from almost all possible troubles, including an extinguished flame, lack of traction, a drop in gas pressure, freezing, etc.

In addition to private houses, Wolf condensing boilers can be installed in multi-dwelling buildings with common chimneys. The manufacturer also guarantees their full compatibility with solar collectors and heat pumps. The boiler can be automated by installing an external temperature sensor (purchased separately). There is also the possibility of remote control of the heating system via a smartphone(there is a special accessory on sale that can be easily connected to the boiler).

The “Made in Germany” stickers that are on all Wolf boilers are not empty advertising. The equipment of this brand is made in the old fashioned way in the very heart of Europe by the hands of German workers. This is one of the reasons why Wolf appliances are noticeably more expensive than similar machines in the same power class from other manufacturers. But the quality of these boilers is appropriate - German, inspiring confidence.