What is the Difference Between Condensing Boiler and Hermetic Boiler?

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What is the Difference Between Condensing Boiler and Hermetic Boiler?

Today's businesses must be very careful when choosing heating systems in terms of factors such as energy efficiency and environmental sustainability. Making the right choice between different options such as condensing boilers and hermetic boilers is critical to the long-term performance and costs of your business. Here is a guide explaining the differences between Ecostar's Condensing boiler and hermetic boiler:

What is a Condensing Boiler?

Condensing boilers produce additional energy by condensing the water vapor formed during the combustion process, resulting in higher efficiency. They recover energy by recovering the water vapor in the gases expelled from the combustion chamber through a condenser exchanger. Thanks to these features, condensing boilers consume less fuel, are environmentally friendly and have a longer lifespan compared to traditional combi boilers, offering a more economical and sustainable heating solution for users.

What is Hermetic Combi Boiler?

Hermetic combi boilers are types of combi boilers designed to be used indoors, taking the air required for combustion from the room and directing it directly to the combustion chamber. These features make it extremely easy to install and save space, as it does not require an extra air duct or outdoor unit for outside air intake. When installed indoors, it provides an aesthetic view to the outside and does not disrupt the architectural integrity. These combi boilers are especially preferred in tight spaces or limited installation options, thus offering more flexibility for users. In addition, hermetic combi boilers provide a more reliable performance as they are not affected by external weather conditions and offer an ideal solution for users who are concerned about the weather conditions outside affecting the performance of the combi boiler.

Condensing Boiler Differences Between Hermetic Boiler and Hermetic Combi Boiler

Condensing Boiler:

  • Condensing boilers produce additional energy by condensing the water vapor formed during the combustion process.
  • This condensation process occurs by recovering the water vapor contained in the combustion gases, which provides higher efficiency.
  • condensing boilers, they are generally more energy efficient and offer a less costly heating solution with lower fuel consumption.
  • They are an environmentally friendly option because they consume fewer natural resources and emit fewer emissions.

Condensing boilers provide higher efficiency by producing additional energy by condensing the water vapor formed during the combustion process, which reduces energy costs and causes less harm to the environment.

Hermetic Combi Boiler:

  • Hermetic combi boilers are a type of combi boiler that does not take the air required for the combustion process from outside, but uses the air taken from the room directly.
  • They are usually installed indoors and do not require an air duct to take in air from the outside.
  • Hermetic combi boilers generally have a simpler structure and are easier to install than condensing boilers.
  • Condensing boilers They generally have lower efficiency and can result in higher energy costs through higher fuel consumption.

Hermetic combi boilers carry out the combustion process by directly using the air taken from the room, which makes installation easier and does not require an extra duct for outside air intake.


In summary, the main difference between a condensing boiler and a hermetic boiler is that condensing boilers can produce additional energy by condensing water vapor during the combustion process, resulting in higher efficiency and lower energy costs. While hermetic boilers use air taken from outside, they generally have a simpler structure and may have lower efficiency than condensing boilers. Therefore, it is important to pay attention to your business needs and priorities when choosing.

Ecostar Condensing Boilers

Ecostar's condensing boilers provide high efficiency with premix combustion and condensation technology and reduce the energy costs of businesses. Additionally, it contributes to the sustainability goals of businesses by providing environmentally friendly solutions.

In conclusion, it is important to consider different factors when choosing between a Condensing boiler and a hermetic boiler, depending on your business needs and priorities. Ecostar's Condensing boiler solutions can be an ideal option for your business with its energy efficiency, environmentally friendly approach and long-term savings advantages.


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