Rating of the most economical gas boilers for heating a private house: how to choose?
The main task of a gas boiler is to produce enough heat for heating the house, and if the design dual-circuit — and for hot water supply (DHW).
But when choosing a boiler, an attentive homeowner will definitely look at how much energy and fuel the unit consumes.
However energy costs — is not the only thing that characterizes economy.
Content
What parameters affect the efficiency of gas boilers
The following factors play an important role in the efficiency of gas boilers:
- type of boiler;
- materials used;
- working conditions.
The devices can be energy-dependent or autonomous.
TO first In most cases, these are closed combustion chamber systems with forced air injection and removal, since they involve elements that require electrical power.
Thanks to compact size Among the devices with a closed combustion chamber there are many wall-mounted gas boilers.
Autonomous devices include: open type, for which properly organized ventilation in the room is sufficient. They are more economical first, although they have a more complex structure and larger dimensions, therefore they are often made in floor option.
From the point of view of the design of the gas boiler itself, its efficiency can be determined by materials usedFor example, heat exchangers are made of copper, cast iron or stainless steel.
The highest heat transfer is observed in copper and cast iron heat exchangers, which allows for less fuel consumption. In addition to materials, costs also depend on the technology of the device.
For example, there is condensing boilers, in which additional heat is generated by steam. They are more expensive than the common convection ones, but they use fewer resources to generate heat.
Special attention should be paid to operating conditions of gas boilers. If the house is not properly prepared for the operation of heating devices, and the volume of hot water supply is not calculated, the costs of operating the boiler can increase significantly, and the equipment itself will fail faster.
Important! To increase the efficiency of the boiler, it is necessary reduce heat loss in the house. Gaps in door and window openings, as well as under the roof, through which heat escapes, must be tightly sealed.
Floor or wall mounted
After preparing the premises for the installation of heating equipment, it is necessary to decide on by selecting its category. Gas boilers come in wall and floor. Here we will talk about wall-mounted models, as the most universal in terms of ease of installation.
Rating of the most economical models on natural or liquefied gas
The rating includes the following models of gas boilers.
Oasis BM 16
A gas boiler of the convection type made in China can only close the rating of efficiency, since its power consumption is 95 W - significantly exceeds the output - 16 kW. This is enough to heat a house with an area of over 150 sq. m. and will require careful preparation in the form of sealing cracks in door and window openings and under the roof.
Photo 1. Wall-mounted gas boiler model BM 16, copper bithermal heat exchanger, manufacturer - "Oasis", China.
The model is equipped with: bithermal heat exchanger, closed combustion chamber, coolant temperature regulator. Oasis BM 16 operates on both natural and liquefied gas. The performance of the DHW circuit at 25 °C makes up 8 l per minute. The efficiency is equal to 90%To save fuel consumption and achieve a comfortable temperature, a thermostat is connected to the boiler.
Navien Deluxe 24K
This convection type unit is made in South Korea. It is wall mounted and is designed into two circuits.
Although the power ratio of the gas boiler 150W input and 24.00kW output and puts it to sixth place, It is worth noting its reliability.
The gas boiler model uses stainless steel heat exchangers, which are resistant to mechanical impact.
The device has a closed combustion chamber, which requires the installation of a coaxial chimney. The efficiency of the unit is equal to 90.5%. The Navien Deluxe 24K gas boiler is capable of providing heating to an area more than 200 sq. m. and DHW performance 9.9 l/min at 35°C.
The maximum consumption of natural gas for the operation of the unit is 2.58 cubic meters, and liquefied - 2.15 kg per hour. Using a thermostat can significantly increase savings on heating costs.
Bosch Gaz 6000 W WBN 6000 24 C
Wall hung gas boiler with two convection type circuits made in Germany.
Bosch Gaz 6000 W WBN 6000 24 C consumes 150 W and gives the maximum 24 kW, which provides him with fifth place in the ranking.
This capacity of the gas boiler is sufficient for heating the area. more than 200 square meters.
The advantages of the model in terms of performance are the copper primary heat exchanger and the closed combustion chamber with a coaxial chimney. Thanks to them, the house always has not only heat, but also hot water, the performance of which is equal to 11.4 l/min at 30°C. The efficiency of the device is 93.2%.
At temperature 35 °C natural gas consumption is 2.8 cubic meters per hour, and liquefied - 2 kg per hourConnecting a thermostat to the gas boiler allows you to increase gas consumption savings.
Leberg Flamme 24 ASD
Gas boiler into two circuits Convection type wall mount from Norwegian manufacturer provides efficiency 92.3%. Unit consumes 120 W and produces 24.00 kW.
Borrow fourth place its efficiency is aided by an efficient bithermal heat exchanger and the ability to smoothly regulate power depending on the air temperature in the room of an area over 200 sq. m.
The appliance has a closed combustion chamber, which implies the use of a coaxial chimney. The performance of the DHW circuit at a temperature of 30 °C - 10 l per min. Natural gas is being consumed maximum 2.37 cubic meters. per hour, and liquefied - 2.09 kg per hour. Connecting a thermostat increases the efficiency of a gas heating boiler.
Mora Top Meteor PK24KT
The Czech unit belongs to the convection type and has two contours and is mounted on the wall. With a ratio of consumed - 110 W — and a day off — 24.00 kW — the power of Mora Top Meteor PK24KT takes third place in terms of economy.
The model allows to provide heat and hot water to a room of an area over 200 sq. m.
The boiler uses a closed combustion chamber, a coaxial chimney and a copper heat exchanger. The efficiency of the unit reaches 90%.
At a temperature indicator at 30 °C the flow of hot water reaches 11.2 l/min.
When the unit is operating, it consumes 2.67 cu.m. m of natural gas per hour. Connecting a thermostat to a gas boiler allows you to make the temperature in your home as comfortable as possible and increase fuel economy.
Reliable Ariston Clas B 24 FF
The Italian gas wall-mounted boiler of convection type has two contours: for heating and hot water supply. Its output power is 25.80 kW at power consumption 120.0 W. This ratio of indicators is not the only thing that distinguishes this model from others.
Photo 2. Gas boiler model Clas B 24 FF convection, with turbocharged chimney, manufacturer - "Ariston", Italy.
It has a noticeable hot water supply performance: at 35 °C - 15.7 l/min. The unit is equipped with a closed combustion chamber, which implies a coaxial chimney. A copper heat exchanger is used as the primary one. Natural gas consumption is 2.86 cubic meters, and liquefied - 2.13 kg per hour. The efficiency of the device is 93.8%
Bosch gaz 4000 W ZWA 24 2 A
The double-circuit wall-mounted convection gas boiler of the German brand has the lowest power consumption 90 W. In this case, the output is 24.00 kW. The device has a closed combustion chamber, which implies a coaxial chimney.
The bithermal heat exchanger contributes to efficient heat transfer. The resulting power is sufficient for heating area over 200 sq. m.
The Bosch gaz 4000 W ZWA 24 2 A model features high efficiency 96%. At temperature at 30 °C the flow of hot water reaches 11.4 l/min.
The consumption of natural gas in the boiler is 2.92 cubic meters per hour, and liquefied - 1.93 kg per hour. You can effectively save gas and electricity using the device due to smooth power regulation, as well as by connecting a thermostat.
Useful video
Check out the video that explains how truly economical gas boilers are designed.
How to improve the efficiency of heating a private house
With a wide range of units, it is easy to choose the right device for specific conditions. At the same time, you can further reduce the operating costs of the boiler if insulate the room, reducing heat loss in it, select the device taking into account the frequency of its switching on (all year round or only in cold weather) and correctly calculate the characteristics of the device.
What is meant here is the need to add to the output power of the gas boiler 20%, since it is not recommended to operate it at maximum power. That is, for heating 100 sq. m. of premises the best choice would be a unit with a capacity of 120 kW. With such a thoughtful approach, your own foresight, along with the choice of a quality product, will allow you to provide your home with not only maximum comfort, but also minimum costs.
