If you want for your house or apartment, an economical source of heat and hot domestic water, you would like to know which is the best condensing boiler . Such a gas condensing boiler will help you save money and energy. Such a wall-mounted boiler can have an external boiler or a built-in boiler, some models can run on gas or LPG. We will help you with opinions and recommendations for the best models. We recommend you to see the Ariston Clas One 24 wall-mounted condensing boiler.
The best condensing boilers – TOP 10 new models
Here are some of the best condensing boilers you can find in Bucharest, Iasi, Brasov, Cluj, Timisoara or Constanta. You can find them at eMag, Dedeman or even Altex. In the medium term and even more so in the long term, with the increase in natural gas prices, there is an advantage in implementing a device that uses a low temperature heat converter and a condensing boiler.
Up to 94% efficient
Ready for Ariston Net remote control
Stainless steel heat exchanger
Total power consumed 77 W
IP X5D electrical protection class
AISI 304 stainless steel primary heat exchanger
Reduced Class 6 emissions
Power 25 kW
Flame digital surveillance
Methane / GPL Ready
Standard energy efficiency of up to 109%
Reduction of energy consumption and pollutant emissions
Efficient connection technique for quick installation and installation
Aluminum-silicon alloy heat exchanger
Recommended for rooms up to 192 sqm
Which is the best condensing boiler
A gas condensing boiler is a boiler in which the conversion of accumulated heat into steam takes place by the evaporation method. According to its architecture, the gas heating plant has proven to be extremely efficient and convenient.
In describing the specific characteristics of the best condensing boiler, it is prudent to equate it with a conventional model. Combustion products in the form of hot exhaust gases are channeled into a heating medium in a traditional boiler, where they emit a lot of steam. And, through the chimney, such exhaust gases are emitted into the environment. While at the same time most of the wasted heat is wasted. Because, together with the gases, the water vapor produced during the combustion of the fuel still disappears. The emitted gas is the one that transports the chemical energy retained in the material.
A condensing boiler is able to retain and supply the heat captured by the water-air heater. As the steam cools, it turns into a fluid due to condensation. And therefore it releases a certain heat. To discourage condensation from occurring in a conventional thermal power plant, there is a system against it. At the same boiler, condensation is essential. Condensation takes place in a unique heat exchanger built with an extended surface.
The performance of a condensing boiler is almost always higher than the power of a standard boiler. The performance being the productivity of the boiler, the amount of fuel used in relation to the amount of heat that will produce the best condensing boiler. If the productivity of thermal power plants is higher than 100%, they are net energy sources rather than energy consumers. Fire, as we know, is not produced anywhere.
The benefits of a condensing boiler
There are several reasons why these thermal power plants are exceptional. The heat emitted while consuming a unit of carbon, such as heat generated by condensation, is the cumulative raw heat of the combustion process. The same heat concentration, however, without considering evaporation, is called reduced or lower energy of gas combustion.
It is obvious that, according to scientific rules, energy losses are inevitable and the line cannot be exceeded 100%. This is what makes such a productivity benefit effective. In the old days, all measurements were focused on the value of the net enthalpy. Therefore, this is not a real analogy, but a heuristic. Even if the maximum energy content of condensing power plants proved to be high. The performance of these six proves to be much better than that of conventional gas-fired power plants.
In addition to the high performance of condensing boilers, they have other benefits. Including their improved results, which is about 17% higher than the standard. In fact, such boilers use high-tech burners, which guarantee that the fuel and air are burned in the perfect proportion for the ignition phase in which the good thermal power plant works . By using synthetic pimples, the volume of toxic pollution is much lower. And the cold exhaust gas temperature can be used, which can reduce their construction costs.
Anything necessary for the proper functioning of low temperature surface heating systems is done. The condensation method is implemented throughout the entire heating process. A requirement for the activity of the condensing boiler is that the temperature of the coolant applied to the condensing boiler is lower than 54 degrees Celsius.
Operation of the best condensing boilers
Gas condensing boilers are usually identical in style to the standard ones. They are usually installed on the wall and then seen in commercial and office settings. In a double electric boiler, the heat exchanger is made of acid-resistant materials, such as stainless steel or silumin. Due to this acidic nature, water vapor can trigger the corrosion of steel and cast iron used in the construction of condensing boilers.
The heat exchanger can be rendered using tubes with different cross sections, as well as circular fins with complicated plans. Both changes are made to improve the heat transfer surface. And, consequently, the total performance of the thermal power plant. The best gas condensing boiler uses a fan mounted in front of the burner. Which draws the gas from the tank, combines it with the atmosphere and guides it to the burner.
Flue gas is usually removed by flue pipes, which are usually made of heat-tolerant plastic. The controller controls the movement of the heat collector and improves the performance of the heater. Regardless of the perfection of the radiator, its efficiency is closely related to the operating conditions of the heater. The lower the water temperature, the more water vapor can condense. The more residual energy will be transferred to the environment. Therefore, the better the productivity of the thermal power plant.
In order to effectively reach the target temperature, it is important to establish that the coolant temperature in the return circuit does not really exceed 58 degrees under any external circumstances. In case of a relatively low frost, the heater will operate in the condensation phase and will be between 46-51 degrees in the return line.
Aspects regarding the productivity of thermal power plants
If the temperature drops, condensate production would become more efficient and improve the performance of the condensing boiler. However, even if you install the best gas condensing boiler in the position of an existing model. Without changing the heater, it would always work a lot of the time with the impact of condensation, which means more efficient than the old one. Due to the fact that extremely cold days represent only about 10% of the heating period, evaporation is likely for the rest of that time.
Versions for boiling hot water and heating are also available and can power up to 99 kW. For commercial use, this is more than enough. And for factory or business use, more efficient versions are made, with longer runs. The accessories also include tools for attaching the condensing boiler. Extension tanks, condensate neutralizers based on the power of the installation, neutralizing agents, protection equipment. As well as devices for piping the thermal power plant and attaching a hydraulic exchanger, flue gas discharge devices. There are many wall and floor mounted models on the market.
It is worth remembering that in Europe, the main electric heating systems are used. And many places even ban the construction of all other gas burners. The explanation is that it causes lower concentrations of toxic pollutants and better productivity. Some states have passed legislation banning the sale of inefficient and environmentally friendly cars.
Plant productivity is much higher than 100%. This statement by condensing thermal power plant manufacturers astonishes all those who are not informed about thermal power plants and those in the industry.
Working principle for the best condensing boiler
Most portable heaters are floor-mounted and wall-mounted. These are contrasted in terms of features and efficiency characteristics. However, such an analogy may not be accurate. Condensed thermal power plants range from 40 to 120 kilowatts. While traditional suspended heating plants range from 18 to 38 kilowatts. Therefore, the best 65 kW condensing boiler has the same real capacity as a classic floor-standing boiler with the same size.
The theory of the activity of any condensing thermal power plant involves the use of energy that, through chemical processes, produces water vapor and produces moisture. The heat produced by the boiler is often used to maintain the temperature in the refrigerant. In the heating technique, the performance of a condensing thermal power plant is calculated by the ratio between the usable heat obtained during heating and the supply of hot water to the burning heat.
The amount of heat produced by the complete combustion of the fuel and the cooling process of the combustion products under normal circumstances. Even so, it remains important to differentiate between the various fossil fuels based on their burning heat. The total calorific value of a food is the gross caloric quantity, including the caloric density of water. It is the decisive factor of consistency. As a consequence of the heat and resources wasted by the combustion phase, not all heat can be transmitted to hot water.
The performance at the best gas boiler would normally be less than 99%. Because all over the globe, the performance of conventional power plants is always based on the evaluation of the minimum combustion heat. So that for an equitable correlation of conventional and condensing power plants, the performance of the latter is considered equal to 9-11%.
Material selection for the heat exchanger
The silumin heat exchanger is able to retain more heat and provide improved heat transfer. The characteristics of the object allow the light heat exchangers based on silumine to be made of high resistance. As standard, heat exchangers are cast because the glued edges are a major weakness in which component damage begins to occur.
Attributed to the reason why silumen heat exchangers are made of cast metals. They are cheaper to produce and technologically sophisticated, which will help you play with their shape to maximize the flow of gas and coolant. to help improve the performance of the boiler. Silumin attributes its strong anti-corrosion ability to the aluminum oxide coating produced on the metal surface by the application of oxygen.
Moreover, the silumine heat exchangers have a moderate water content and a low hydraulic resistance. In comparison, granular metal heat exchangers are much more robust hydraulically and less demanding in terms of air flow. than heat exchangers made of stainless steel. Even so, siluminous heat exchangers cost more than regular condensing boilers.
The heat distribution device for the best gas condensing boiler must have the same efficiency as the rest of the heating system. Due to the high degree of heat absorption, the condensing boiler uses a large part of the lower combustion heat. It is essential that the materials used for the chimney of a condensing boiler fit the planned application. All the water that does not condense on the heat exchanger in the boiler would definitely condense in the basket. and would damage the heat exchanger.
Evacuation of the generated condensate
Acidified steam occurs at the gas condensing boiler. Of necessity, steam often occurs during the service of conventional thermal power plants . However, more often the occupants of thermal power plants do not understand the presence or do not care. because almost all are vaporized and enter the container. Although it is not bad to think about it, sulfur oxides could enter the environment. and could form sulfuric acid that can affect the ecosystem.
At the best gas condensing boiler, you must think about the correct way to treat condensation. By the way, it happens quite a lot. For example, in a small 24 kW thermal power plant, it will capture about 24 liters of condensate for a day. Condensation is also collected by draining into the pipe. Except for one condensing boiler for domestic use. It is necessary to drain the condensate without being counteracted by power plants with a power of up to 128 kW. Alternatively, you should install neutralizing products such as magnesium and potassium. And to apply these substances regularly, which is a little inconvenient, but anyone can manage it.
The gas level at the outlet of the condenser is much lower, because almost all the thermal energy is absorbed by the condenser. Exhaust gases from the chimney can be emitted not only to the roof, but also to the wall. So the pipe can be thinner and made of plastic. If you can't build a water-heated base, buying a condensing boiler will be an ideal choice for you. It obviously has the biggest reason to use heaters to heat the building. To condense the steam in the burner, many consider using a water heater.
Characteristics of the operation of condensing thermal power plants
By the way, traditional thermal power plants are as efficient as those with condensation, but they vary in a major way. At the best gas condensing boiler, all the condensate is removed from the cooler to prevent it from accumulating on the heat exchanger and wasting it. As the heat of the combustion products is emitted at a temperature of 124 C in the chimney, the chimney current decreases. And the condensate starts to accumulate in the thermal power plant, for which a traditional thermal power plant is not prepared.
Consequently, the chimney for a good condensing boiler is made of acid-resistant materials, such as stainless steel and plastic. And it has a minor gradient to drain the water created by the evaporation of the steam that reaches the basket.
The main advantage of the best condensing boilers is the higher performance than other types of sets. The debris in the air coming from the appliance causes damage to the fan. We are also experiencing this type of problem for all closed burners, whether they are condensed or not. Not only the environmental dust influences the performance of the gas thermal power plant, as well as the intensity at which it works.
Cold weather can trigger the air circulation tube in the ice when the temperature of the exhaust gas from the condensing boiler is low. And they can't heat the chimney walls properly. This contributes to a reduction in the proportion of air required for complete combustion of the fuel. Which results in a poor quality of the boiler. Consequently, not all condensing boilers are ideal for places that can withstand extremely harsh environments.
Operating modes at the best condensing boiler
Even the most qualified consultants could build heating systems to ensure that they are the most efficient. First of all, it is important to determine how the boiler can be used, on which almost all the variables of the device are based.
A gas-fired boiler is expected to provide different degrees of heat at different times of the day, which can be controlled by a gas burner. The gas condensing boiler has the modulation of the burner, which allows them to work in a constant rhythm. Burners, on average, have a wide range of heat production between 15 and 95%. By doing so, it is possible to keep the correct temperature in space and save money on fuel.
Gas burners are still present on a significant proportion of traditional power plants. If the condenser return temperature is lower. Evaporation can continue to develop in the plant, allowing the plant to be used to its full potential.
The distinction is at the best condensing boiler. The heater is successful only at lower operating temperatures, because the condensation in it is very appreciated. When trying to condense the boilers, the temperature of the heat source decreases. In this phase, the largest volume of water vapor is created from the combustion processes, and the water condenses from the atmosphere. Then there is the problem of designing a heating system that can adequately produce the necessary heat without being too massive.
A underfloor heating device helps the condensing boiler to continue to use the heated air in the air conditioning system during the heating cycle, which maximizes cost savings.
Advantages of the best condensing boiler
Very little fuel use up to 33% in one winter. This is not surprising, because innovations are constantly evolving. As a result, gas-fired power plants on the grid are more powerful than those using LPG.
Except for the most unfavorable high temperature conditions. The heat exchange capacity of condensing power plants remains higher than that of traditional thermal power plants. Emission levels from the best condensing boiler are on average five to seven times lower. Than they are from a standard gas boiler. Boiler rooms equipped with condensing models manage their service in a much narrower space than conventional thermal power plants. And the total weight of the building needed to house the condensing boiler is less.
The best condensing boiler emits lower noise levels and are less vulnerable to turbulence. The boiler burner must be set correctly so that the heat exchanger does not require washing. The heat exchanger layer is self-cleaning by evaporating the condensate. To do this, they installed an additional heat exchanger in the condensing boilers from which they transfer the residual heat from the exhaust.
Specialists advise different techniques to ensure that the condensing boiler works at 100% efficiency. And saving gas and providing heat in the kitchen. There are many other solutions, such as installing new radiators with an area 4 times larger than the first. Built to operate in a colder temperature range. In comparison, normal gas boilers are often a fairly energy efficient and innovative alternative.
Cascading gas boiler
Consumption is also a difficult decision between buying a high power gas condensing boiler. Or the construction of several low-consumption power plants attached to each other. Lately, the latter method has become more common. In fact, cascading configurations have many advantages. With their support, the heater is configured to provide a high degree of redundancy. Which in case of a failure of one or even many plants. By cascading multiple power modules, the freedom to control one power module is extended. which allows it to be optimized to optimal operating levels.
Currently, many wall-mounted condensing gas boilers have been built in cascade and there are many more. In medium and large heat exchanger systems, condensing boilers are increasingly competitive than conventional boilers. The most popular use of a cascading device is in heating retail spaces, for roofing plants in the residential complex and for other areas where it is necessary to have the highest resistance of the heat source in the smallest possible room. .
In this decade, the future belongs to energy efficient technology in the form of the best condensing boiler, and these boilers are at the highest levels both in terms of their efficiency and in several other attributes. Although condensing gas boilers have benefits, it is true that, unlike other forms of thermal power plants, they are more expensive. The advantages of the best condensing boiler are undoubtedly fantastic, but the disadvantages are pale in contrast.
Use of condensing boilers
The best condensing boiler received the title given the fact that it uses the technology of collecting excessive energy, because the cumulative water content varies from the vapors trapped in the flue gases in the condensate. Because natural gas is burned in a traditional thermal power plant, water vapor is produced that comes out along with the flue gases. If the gas is diluted and cooled, more thermal energy can be applied and transformed into a coolant.
The transfer from fog to fluid takes place at a temperature called dew level and is called condensation. In the water, the level is about 55-59 degrees. This is the maximum degree of energy efficiency at which the thermal power plant operates. A modern heat recovery plant would be more powerful than a conventional thermal power plant.
In steam installations, condensation occurs at the central heating plant, a corrosive substance that contains acids. European countries have varying standards on how recycling is done. This is either the discharge into the water stream or the accumulation in a specialized neutralizing granulate bath. The best condensing boiler with a potential of up to 28 kW does not contain much condensation and this condensate can be released into the sewer.
Condensing boilers are more efficient at low temperatures and at inlet / outlet temperatures higher than 54 degrees. The final product must be considered during planning or restoration. When heating systems have a low temperature scheme, it is more important to add a larger amount of radiators so that the pipe under the floor would be narrower. But the increased consumption of gasoline would be completely negligible.