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Legislation

Which regional legislation for your heating installations?

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Strict rules apply for heating installation servicing, inspection and audits. They differ according to the installation’s capacity and type of fuel.

For your safety and the environment, but also the proper functioning and good energy performance of your heating system, it is essential that you comply with the legal requirements. Your insurance can also become invalid if you fail to do so.

Every region has drawn up strict rules 

Flanders

More information

Brussels

More information

Wallonia

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audit heating electrabel

Flanders

Maintenance

Each boiler with a nominal capacity ≥20 kW must be inspected periodically. This maintenance must be carried out by an certified technician who cleans the flue and the boiler itself, including the burner and flue gas regulator:

Once every 2 years for gas boilers

Every year for oil-fired boilers

Once the maintenance has been completed, you are issued a certificate which you must keep safe until the next inspection.

Audit

From 1 July 2024, the Flemish government will no longer require central heating systems more than 5 years old to undergo a heating audit. Nevertheless, we recommend that you carry out an audit of your heating system in order to improve its efficiency and prevent breakdowns and related costs.

Discover our independent audit for your heating installation.

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audit heating electrabel

Brussels

Periodic inspection

The periodic inspection must be carried out every year for an oil-fired installation and every 2 years for a gas installation. 

This ruling includes cleaning the boiler and flue, and checking the combustion quality. The proper functioning of the ventilation and flue gas extraction will also be checked. 

If the installation complies with the criteria, you receive a periodic inspection certificate. If there is a problem, it is stated on the document and sent to the BIM. The periodic inspection must be carried out by an accredited heating installer type L for fuel oil and type G1 or G2 for gas, depending on the installation model.

Audit

Since 1 January 2019, gas installations with a capacity of more than 100 kW must be audited every 5 years. This audit assesses the energy performance, indicates the requirements that your system needs to comply with, and makes recommendations for modifying or replacing your boiler.

For boilers with a capacity up to 100 kW, the audit may be carried out by an accredited installer. Only an EPC heating adviser may carry out audits on boilers with a capacity of more than 100 kW or systems with multiple boilers.

Discover our independent audit for your heating installation.

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audit heating electrabel

Wallonia

Periodic inspection

The inspection (emission measurements and checking the location of the heating, ventilation and flue) is carried out by a technician (accredited for liquid fuel for fuel oil, G1 authorised for atmospheric gas and premix, and G2 authorised for pulsed gas):

Every year for oil-fired installations with a capacity of more than 20 kW (or composed of various heating systems);

Every 2 years for gas installations with a capacity of more than 100 kW (or composed of various heating systems);

Every 3 years for gas installations with a capacity of 20-100 kW.

Audit

The audit or detailed diagnosis became a legal requirement in Wallonia on 1 May 2015. It is applicable for all heating systems with a capacity >20 kW.

Obligations:

An initial thorough diagnosis of all central heating systems using gaseous fuels, carried out immediately after the first periodic inspection or at the next inspection;

A thorough diagnosis after modifying the heating or a changed heating requirement for a building (e.g. as a result of insulation work, building an extension...)

It must be carried out by an technician accredited for thorough diagnosis:
o    Type 1 for installations with a single boiler with a capacity ≤100 kW;
o    Type 2 for installations with multiple boilers or a single boiler with a capacity >100 kW;
 

Discover our independent audit for your heating installation.

Request an audit
Your heating audit in 4 steps
1

Contact us

Contact us for an appointment.

2

Appointment

Our expert will ask you for an initial set of data and schedules the appointment.

3

Audit

Our expert inspects your heating system. You will receive the required certificate and a report with recommendations.

4

Follow-up actions

We are happy to assist you in following up on possible actions to make your heating installation even more efficient.

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