Benefits of a condensing boiler: why you should buy one

28 Jul.,2025

 

Benefits of a condensing boiler: why you should buy one

Condensing boilers: the advantages for your home

Are you planning to replace your old boiler with a more modern, sustainable, and efficient model? The condensing boiler is a state-of-the-art technology to keep in mind for your home heating. Choosing the most suitable model for your home and consumption habits can offer numerous advantages. From efficient operation to reliable performance, improved energy savings and living comfort, let’s take a look at why it makes sense to install a condensing boiler and which type to choose.

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Condensing boiler vs. traditional gas boiler

Before exploring the advantages, it is useful to know how a condensing boiler works and how it differs from a traditional gas boiler.

A condensing boiler, like a traditional model, is fuelled by methane or LPG gas that is burnt inside a combustion chamber, producing heat, which heats the water circulating inside domestic heating systems (such as radiators). In traditional boilers, the hot fumes produced by combustion are expelled, dispersing a large amount of energy.

In condensing boilers, however, the waste heat from the flue gases is recovered by a secondary heat exchanger. Here, the cooling and condensation of flue gas heat generates additional energy, which is used to heat the return water from the heating systems. Only when the flue gases have released all their heat are they expelled from the condensing boiler at much lower temperatures than from conventional boilers.

Condensing boilers are also equipped with advanced sensor and power modulation systems that allow the amount of gas burned to be adjusted according to actual domestic demand.

The main advantages of a condensing boiler

This first comparison has given us an overview of the ability of the condensing boiler to optimise its energy efficiency safely. Now let's take a more detailed look at the benefits:

Greater energy efficiency

Energy efficiency is the ability of a system or appliance to perform its function while consuming less energy. In the case of a boiler, therefore, energy efficiency is the ability to convert heat into the maximum possible amount of energy. For condensing boilers with high energy efficiency (A+++, A++, A+, A,) the minimum energy efficiency value must be 90% or higher.

Reducing consumption and saving on bills

The higher the energy efficiency of the condensing boiler, the lower the energy consumption and thus the lower the charge in the gas bill for the same consumption. Thanks to the recovery of latent heat, a condensing boiler can give you a 30% saving on gas consumption, thus amortising the initial cost and repaying the purchase investment over time.

Less pollution

Lower gas consumption - thanks also to modulation systems for the amount burnt during combustion - and energy recovery mean condensing boilers are eco-friendly. They emit less carbon dioxide and nitrogen oxides, which are responsible for pollution, for the same consumption. 

However, the sustainability of your condensing boiler depends on its operation at full efficiency. So, remember to carry out regular maintenance and make sure that the installation and activities of your condensing boiler, such as flue gas discharge, comply with regulations (UNI : "Consolidated Law for gas systems” and related legislation). 

Integration with renewable energies

The condensing boiler can be integrated with other technologies using renewable sources, such as an air-water heat pump powered by photovoltaic panels. This would create a hybrid system powered by two different heat sources. 

Otherwise, it is also effective to integrate the condensing boiler with a solar thermal system where solar panels (or collectors) transform the sun's energy into heat, supplying the house with domestic hot water and heating. 

Improved home comfort

In general, boilers are durable appliances, a fact that guarantees them a lifetime of more than 15 years on average. When consumers find themselves changing an old boiler after a long time, they then discover the incredible modernisation of the new models. Condensing boilers are less bulky, quieter and have a modern, understated, cutting-edge design for home comfort that is reflected in both style and performance.

How to choose a condensing boiler

If these advantages have convinced you to replace your old boiler with a modern, more efficient condensing model, let’s explore the most suitable types for your home. First of all, you can choose between indoor and outdoor condensing boilers: the former are preferable because they are protected from temperature variation and weathering. Condensing boilers can then be divided into:

  • Wall-mounted condensing boilers: being mounted on a wall, these are therefore smaller in size, suitable for homes with little space, and can be easily placed in the kitchen, or in a cupboard or wardrobe.  
  • Floor-standing condensing boilers: these larger models are installed on the ground and are suitable for larger spaces or buildings requiring a higher heating output.  
  • Compact condensing boilers: these include the integration of a solar thermal cylinder for storing domestic hot water produced by a solar thermal system.

Heat your home with Enel Energia

The condensing boiler, therefore, adapts to every domestic ecosystem, guaranteeing efficient and environmentally sustainable performance. For your winter heating, Enel Energia helps you choose, with a selection of condensing boilers and gas offers tailor-made for you. 

Discover more at enel.it and heat your home with Enel Energia.

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Condensing boiler - what it is and what are its advantages

Modern condensing boilers are very popular and are an excellent alternative to their traditional versions. They are characterized primarily by high efficiency and economy. Using them is also safe. Choosing the right home heating is a very important decision, and a condensing boiler can work perfectly. Find out what its advantages are and how it works.

What is a condensing boiler?

A condensing boiler is a component of a heating system that is responsible for generating heat and distributing it to individual rooms. As the name of this device indicates, inside, in a closed chamber, the process of condensation, or condensation of water vapor from the flue gases, takes place. This recovers energy that can be reused. It is due to the process of condensation that such boilers have a much higher efficiency compared to traditional models.

How is a condensing gas boiler built?

There are single-function and double-function condensing gas furnaces on the market. They differ from each other primarily in their application. The former only supply the central heating system. They do not have heat exchangers, so they are not able to heat domestic water on their own. For this to be possible, it is necessary to use special heaters.

On the other hand, a condensing dual-function gas boiler heats water on a flow basis and both feed the central heating system and deliver it to the taps. It should be borne in mind that in the first moments after turning on the tap, cold water flows, which was in the pipes. Most often, it is only after several seconds that it has the desired temperature.

Condensing stove vs. underfloor heating – this is worth knowing

Condensing furnaces can successfully work with both traditional radiators and underfloor heating. This is possible because the device is compatible with a low-temperature system, and such is the underfloor. To increase the efficiency of such heating, it is worth using wireless and wired systems from Engo Controls. They allow you to conveniently control the temperature in individual rooms. This not only provides adequate comfort but also has a beneficial effect on reducing the expenses associated with heating. Thanks to regulators and controllers, it is easier to control the temperature level and ensure that it is not too low or too high.

The most important advantages of a condensing gas furnace

Without a doubt, the most important advantage of such a furnace is its efficiency. It makes maximum use of the fuel burned and thus provides heat. The best condensing gas boilers are distinguished by an efficiency of up to 107-109%. This is possible due to the use of energy escaping during condensation of water vapor and cooling of flue gases.

The cost of purchasing such a furnace is higher than for a traditional model, but in the long run, it is a more cost-effective solution. All thanks to the mentioned efficiency. Such a boiler uses less fuel, and at the same time provides the optimal temperature. However, it is necessary to remember that it is essential to take care of the tightness of the heating system, as well as the quality of the fuel. The gas supplied to the boiler must not have impurities.

Condensing gas furnaces are automated and therefore virtually maintenance-free. In addition, it is worth equipping them with remote control systems via the Internet, which you will find in the offer of Engo Controls. Thanks to them you will be able to control the operation of your device even when you are away from home. Such a solution is not only comfortable but above all economical.

A modern boiler adjusts its operation mode to the conditions outside. It can be programmed to operate at full power when the ambient temperature is very low. On the other hand, on other days, when the demand for heat is much lower, the device will use fuel economically. Such action will translate into lower bills.

Listing the advantages of a condensing boiler, we can not forget about safety as well. It has a closed combustion chamber, and the air necessary to carry out the heat generation process is supplied from the outside through special pipes. As a result, the room in which the furnace is located is not cooled. Such a boiler is also safe since the exhaust gases are discharged to the outside.

Other advantages with which a condensing furnace is distinguished are:

– quiet operation;

– no need to store fuel;

– low operating costs;

– easy installation;

– stylish appearance and compact size.

In contrast, the biggest disadvantage of the boiler is its price. You have to pay significantly more for a modern model that is fully automated than for a traditional gas furnace. However, the investment is usually already returned within a few years thanks to the fact that a condensing boiler uses less fuel and is more efficient.

How to choose the best condensing furnace?

When choosing a condensing boiler, first of all, consider what functions it should perform. As you already know, it can only supply central heating, or it can also be used to prepare domestic hot water. Also, pay attention to the control automation with which a particular model is equipped and with which it can work. The more advanced the technology, the more comfortable the use of the device.

Condensing boilers are also divided by the method of installation into wall-mounted and floor-standing. The former is perfect for small rooms where there is not much space. A standing furnace is worth using, for example, in the boiler room, that is, where it will not interfere with normal operation. Such a model is usually more capacious than a wall-mounted boiler.

When choosing a condensing furnace, consider its power. This is a key parameter that must be matched to the size of the building, as well as its thermal insulation. The larger the volume and heat loss, the more power is needed.

When considering the type of heating in your home, consider installing a condensing gas boiler. This is an extremely efficient device that will allow you to save on fuel, with minimal effort during operation.

For more information, please visit wall mounted condensing gas boiler.