Boiler installation

The boiler is the heart of the central heating system and is present in most homes in Belgium. These days, many people are also switching from an oil-fired boiler to a natural gas boiler or opting for a heat pump. Replacing a boiler is no simple matter. In most cases, the new installation takes a day. Our heating engineers know exactly which central heating systems are right for which type of home and occupants.
boiler installation

What type of boiler should I choose?


Energy source
Energy efficiency
CO2 emissions
Installation costs
Cost of use
Service life
Eligible for subsidies


Fossil fuels
High (fuel prices)
10-15 years


Air, water or floor
From 250 to 400%
Low to nil
Weak (electricity)
Less frequent
15-20 years

Heat pumps offer a number of advantages over traditional boilers, particularly in terms of energy efficiency, environmental impact and running costs.

installation boiler heating engineer

The difference between a conventional boiler and a heat pump

A conventional gas or oil boiler and a heat pump are two different heating systems that use different energy sources and operating principles.

Conventional gas or oil boiler

A conventional boiler works by burning natural gas (gas) or fuel oil to produce heat. This heat is then transferred to the water circulating in the heating system's pipes and radiators. Conventional boilers are generally cheaper to buy and install than heat pumps. However, they are less energy efficient and produce higher CO2 emissions, contributing to global warming.

Heat pumps

A heat pump is a device that extracts heat from the outside air, groundwater or ground and transfers it inside your home to heat the rooms. It works on the principle of thermodynamics, using a refrigeration cycle to move heat from one place to another. Heat pumps are more energy-efficient than conventional boilers and produce fewer CO2 emissions. They are also capable of providing both heating and cooling. However, they generally cost more to install and purchase.

The advantages of a conventional boiler and a heat pump

The advantages of a conventional boiler

Lower initial cost

Conventional boilers are generally cheaper to buy and install than heat pumps. This can make them more affordable for some homeowners.

Simple installation

Conventional boilers can be simpler and quicker to install, particularly in existing homes where central heating systems are already in place.

Compatibility with existing radiators

Conventional boilers are often compatible with existing radiators and central heating systems, which can minimise upgrade or replacement costs.

Low temperature performance

Conventional boilers can offer consistent performance even in very cold weather, whereas the efficiency of air-to-water heat pumps can decrease as the outside temperature drops. This can be an advantage in regions with particularly harsh winters.

Energy independence

Oil-fired boilers can operate without access to the natural gas network, offering energy independence in rural or remote areas where the gas network is not available.

Ease of maintenance

Conventional boilers are often considered easier to maintain than heat pumps, as they have simpler mechanisms and fewer electronic components.

It is important to weigh these advantages against the disadvantages of conventional boilers, such as their lower energy efficiency and higher CO2 emissions, when deciding which heating system is best suited to your situation.

The advantages of a heat pump

Energy efficiency

Heat pumps are generally more energy efficient than conventional boilers, as they harness heat from the outside air, groundwater or ground to heat your home. This can mean savings on energy bills in the long term.

Reduced CO2 emissions

Heat pumps produce fewer CO2 emissions than conventional boilers, making them a greener, more environmentally-friendly option.


Heat pumps can provide both heating and cooling, unlike conventional boilers which only provide heating. This can provide greater comfort and better regulation of indoor temperature throughout the year.

Less maintenance

Heat pumps generally have fewer moving parts than conventional boilers and do not require a burner or chimney, which can reduce maintenance requirements.


Heat pumps generally last longer than conventional boilers because they have fewer moving parts and are less subject to wear and tear.

Noiseless performance

Heat pumps generally operate more quietly than conventional boilers, which can improve comfort in your home.

Independence from fossil fuel prices

Heat pumps do not use natural gas or fuel oil, which makes them less sensitive to fluctuations in the price of fossil fuels.

It is important to bear in mind the higher initial costs and possible installation complications of heat pumps compared with conventional boilers. Every situation is unique, and it's essential to weigh up the advantages and disadvantages of both options to determine which heating system is best suited to your needs.

Financial savings and subsidies

In Belgium, various grants are available to support the installation of a heat pump. The amounts and eligibility conditions vary from region to region.

Walloon Region

The Walloon Region offers energy subsidies for the installation of a heat pump. The amount of the subsidies depends on the type of heat pump and the household income. Amounts can vary between €1.000 and €4.000 for a heat pump used for heating, and between €1.000 and €3.500 for a heat pump used for domestic hot water.


In Flanders, homeowners can receive subsidies for installing a heat pump in their home. The amounts of the subsidies vary according to the type of heat pump, with amounts of up to €4.000. What's more, if you install a heat pump in combination with photovoltaic solar panels, you can benefit from an additional subsidies.

Brussels-Capital Region

The Brussels-Capital Region also offers subsidies for installing a heat pump. The amounts vary according to the type of heat pump and household income. For a geothermal heat pump, the subsidies can be up to €4.000, while for an air-to-water heat pump, it can be up to €1.750.

It's important to note that the amounts and conditions of eligibility for subsidies may change over time. We recommend that you consult the official websites mentioned regularly for the latest information, and contact the relevant authorities to check your eligibility for the subsidies.

boiler installation subsidies

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Local pros

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We work with the following boiler brands, among others

De Dietrich

Is the brand of your boiler not listed above? Don't worry, there's a good chance that our professional heating engineer can still help you. We do all brands.

boiler installation heat pump

The expertise of a qualified professional

Calling in a professional for a conventional boiler or heat pump installation guarantees you recognised expertise and specific skills. A certified installer is trained in the various installation techniques and the standards in force, so you can be sure of quality work.

Certifications and accreditations

Our local heating engineers have all the certifications and accreditations required for boiler installation. They have passed numerous RGE certifications (L, G1, G2). They are approved by the Brussels, Walloon and Flemish regions. Our technicians know all about Atlantic, Vaillant, Viessmann, Buderus, Chappee, Bulex, Dietrich, Radson, ACV and other boilers.

A safe, standard-compliant installation

A qualified professional will ensure that your boiler installation complies with current standards and safety regulations. In particular, he will ensure that the electrical and hydraulic connections are made correctly and that the safety devices are in place. By calling in an expert, you minimise the risk of incidents linked to poor boiler installation and ensure the safety of your home.

Personalised support

A boiler installation professional will be with you every step of the way, from selecting the right model for your home to putting the appliance into service. They can advise you on the best options in terms of energy, capacity and performance, taking into account your budget and expectations. They can also tell you about the financial subsidies available for your project.

After-sales service and guarantee

When you call in a professional to install your boiler, you'll benefit from after-sales service and a guarantee on the equipment and installation. In the event of a problem, you can count on the installer's assistance and expertise to solve the problem quickly. This guarantee also gives you peace of mind, so you don't have to worry about unforeseen expenses linked to poor installation.

Maintaining your boiler

A qualified professional not only installs your boiler, but can also offer you regular maintenance of your appliance. This service will help you extend the life of your equipment and ensure that it runs smoothly over the long term. Regular maintenance of your boiler is essential to prevent breakdowns and malfunctions, and to optimise the appliance's energy performance.

Book your heating engineer in 3 easy steps

Step 1

Choose your service and book online

The Pro arrives within the timeslot and creates a free estimate

Step 2

Our Pro carries out the service

The Pro carried out the work in accordance with the estimate I accepted.

Step 3

Pay once the job is done

I pay online on Ajusto's secure platform when the job is completed

Testimonials from our users

Boiler installation

The work to install my new boiler is not yet complete, but so far so good. The price is right and he's professional. Very nice, Ajusto ;).



Heat pump installation

I'm delighted with my experience with Ajusto Pros for the installation of my heat pump. The team was competent, punctual and very professional. Thanks to their work, my house is now comfortable all year round and my energy bill has fallen considerably.



Boiler installation

Hello, a fast and efficient boiler installation. Good advice from the heating engineers. Thanks to both of you.



Heat pump installation

I was extremely impressed by the professionalism and expertise of the Ajusto technicians during the installation of my heat pump. Their sound advice enabled me to choose the solution best suited to my needs. Thanks to their intervention, my home benefits from optimal comfort at a lower cost.



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