TOP-5 gas boilers of increased comfort and reliability

Boilers of the Panther series were first put on the conveyor in 2000, and a year later the Protherm company became part of the Vaillant Group, one of the generally recognized leaders in the heating systems market.

The model with a power of 24.6 kW is used for heating residential premises with a total area of up to 184 sq.m and for preparing hot water. The heating capacity of the latter reaches 12 l / min., and when the “Comfort” function is activated, hot water begins to flow from the tap after 5 seconds. after the start of submission. Thanks to this, savings in resource consumption are achieved, both water and gas spent on heating it.

“Under the hood” of the Protherm Panther 25 KTV, you can find a closed combustion chamber, two separate heat exchangers, an expansion tank with a capacity of 7 liters, a circulation pump with an automatic speed switch and a fan for the forced removal of combustion products. In reviews of the model, sometimes there are complaints about the noise of the fan, but the noise does not cause much discomfort.

Much more often, the owners of the boiler blame the undulating jumps in the temperature of hot water, which is especially noticeable while taking a shower. Often they are associated with reduced water flow due to its low pressure in the water supply system. The rest of the "Panther" leaves a positive impression, in particular, democratic value is a trump card in the model's sleeve. As a result, with similar functionality to older representatives of the class, the boiler captivates with a winning combination of price and reliability.

The birthplace of the Italtherm high-performance closed-chamber boiler is the Apennine Peninsula, which, however, is easy to understand by the name of the manufacturer.

The model will take its rightful place in dwellings with a total area of up to 190 sq.m - the effective operation of the heating circuit is designed for such a figure. It provides circulation of the coolant, heated to a temperature of 35 to 78°C. Water heating for the hot water circuit is carried out in an oversized plate heat exchanger with an additional 10 mm thick thermal insulation layer. It allows you to reduce heat losses and, accordingly, reduce gas consumption for heating water.

The AquaStep function, which preheats the secondary heat exchanger, also helps to reach the set temperature of the DHW circuit faster. When using it, hot water can be obtained after 6-8 seconds. after opening the tap. In addition, it is possible to programme the preheating function by time. In general, in terms of control, the boiler is famous for its flexibility: in addition to the traditional parameters, the informative backlit display shows the current date and time, the pressure in the heating system, and the outside temperature (when the appropriate sensor is connected).

The boiler is equipped entirely with high-quality components: a Grundfos circulation pump, a Honeywell flow switch, a Fime fan, a Nordgas control board and a Polidoro gas burner designed to operate on natural and liquefied "blue fuel". It is almost impossible to find a better option for such an affordable price.

The double-circuit wall-mounted boiler Immergas Maior EOLO 24-4 E has Italian roots in its pedigree. He is responsible for providing heat supply to rooms up to 180 sq.m and preparing hot water with a capacity of up to 12 l / min.

The highlight of the model is the Aqua Celeris system, introduced into the design of the boiler in order to reduce the heating time of tap water. The secret of its fast supply lies in the equipment of the device with an additional storage tank with improved thermal insulation, in which hot water is constantly available. The volume of this tank is 2 liters.

The boiler is equipped with a closed combustion chamber and two heat exchangers (copper for the heating system and stainless steel for the DHW system). As usual for a modern device, electric ignition and electronic modulation of the flame are implemented on board, which makes it possible to achieve accurate temperature maintenance at a predetermined level. For the heat carrier, it is selected in the range from 35 to 85 ° C, and for the hot water supply circuit - in the range from 30 to 60 ° C.

You can control the intensity of heating and the temperature of hot water heating both from the panel on the front side of the boiler body, and with the help of room thermostats. The regular control panel in the arsenal of the model provides the ability to change parameters on an intuitive level, and all the parameters of the device are displayed on a vertical LCD display. In addition, the Immergas Maior EOLO 24-4 E is reliably protected from all kinds of failures caused by a drop in gas pressure, flame extinction, impaired circulation of the coolant, lack of draft or freezing of the liquid in the circuit.

Heating equipment from Vaillant is in great demand among the public, combining in one bottle the vaunted German quality, unpretentiousness in maintenance and flexibility in management. And the adaptability of the turboTEC plus VUW 242/5-5 model to our realities (reduced gas pressure and water pressure) significantly increases its attractiveness in the eyes of potential buyers.

The boiler equipment includes: a primary heat exchanger made of copper for preparing a heat carrier (from 30 to 80 ° C), a secondary heat exchanger consisting of 13 plates (hot water is prepared in it for the water supply circuit), a built-in circulation pump, a stainless gas burner (on it covered by a 10-year manufacturer's warranty), as well as an automatic air vent and expansion tank. The latter has an increased volume (10 l), thanks to which it is possible to avoid a catastrophic increase in pressure in the system.

The installed power of the heater (24.9 kW) is enough to heat dwellings with a total area of over 200 sq.m. And the performance of the boiler for hot water supply is quite enough for the simultaneous supply of water from two taps (for example, in the kitchen and in the bathroom). The “Quick Start” function is included in the category of branded “chips” of the model, which helps to get hot water after a short period of time after starting the boiler.

On the front panel of the device, which stands out against the background of its peers with a remarkable appearance, an electronic control panel with an LCD display is placed. It displays all data on the operation of the boiler (including pressure gauge readings), and the menu user interface itself is clear and easy to learn. When additionally completing the model with a room or weather-dependent thermostat, it seems possible to reduce gas consumption for the year of operation of the boiler by almost 20%. At least that's what the manufacturer claims.

The pedantic German wall-mounted has absorbed all the delights of Bosch products - he is deservedly credited with high rates of safety, reliability and uptime.

The purpose of the Bosch Gaz 7000 ZWC28-3MFA boiler is to heat rooms up to 280 sq.m and provide hot water. The temperature range in the heating circuit must be changed from 40°C to 88°C, and in the hot water system from 40°C to 60°C. For the summer time, the first circuit can be forcibly turned off, and the model is transferred purely to the preparation of hot water.

Together with the boiler, you do not need to wait until cold water drains when you open the tap - a powerful plate heat exchanger makes it possible to quickly start the supply of hot water, which begins to flow almost instantly. The performance of its supply is estimated at 12 l / min. Temperature data for each circuit, as well as information about the burner status and possible errors during operation, are displayed on the LCD display.

Out of the box, the model is equipped with a Heatronic 3 electronic unit, which allows you to connect Bosch FR / FW series thermostats to the boiler. The safety of operation of the Bosch Gaz 7000 ZWC28-3MFA is guaranteed by a whole range of protective functions: from embedded systems to prevent freezing and overheating to full control of the presence of a flame and draft in the chimney. Among the minor shortcomings of the model, one can only rank the increased gas consumption when the boiler is operating at full capacity (3.8 m3 / h versus 2.8 m3 / h for “classmates”) and the considerable cost of the device. However, the inflated price tag more than compensates for the big name of the brand, which has become synonymous with the well-known German quality and reliability.