Which regional legislation for your heating installations?
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
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.
For installations consisting of a single boiler with a maximum capacity of 100 kW, an audit is compulsory when the boiler is 5 years old, and then every 5 years. If the installation consists of multiple boilers, the audit must be carried out by a technician accredited for heating audits.
For installations with a capacity of more than 100 kW or multiple boilers, the legislation is stricter than for a system with a single boiler. The audit must be carried out:
Once every 2 years for oil installations;
Once every 4 years for gas-fired installations (natural gas, propane, butane);
By a technician accredited for heating audits.
An audit report must be drawn up on the basis of a programme set by the Flemish Government.
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.
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.
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.
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.
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;
Contact us for an appointment.
Our expert will ask you for an initial set of data and schedules the appointment.
Our expert inspects your heating system. You will receive the required certificate and a report with recommendations.
We are happy to assist you in following up on possible actions to make your heating installation even more efficient.