
BRL 6000-21 mandatory since 2020
With BRL 6000-21, you demonstrate quality and professional competence in geothermal energy systems.

BRL 6000-21 mandatory since 2020
With BRL 6000-21, you demonstrate quality and professional competence in geothermal energy systems.
BRL 6000-21 certification
Certificate for geothermal energy systems
BRL 6000-21 is an important assessment guideline within the installation sector. This standard is the quality framework for the design, installation, and management of the above-ground part of geothermal energy systems such as thermal energy storage (TES) installations. For companies active in this market, BRL 6000-21 certification is not only an added value, but since 2020 also a legal requirement.
What is BRL 6000-21?
BRL 6000-21 stands for the assessment guideline that ensures quality and professional competence in the design, installation, and management of above-ground components of geothermal energy systems. This standard focuses specifically on the above-ground part. Think of power plants, pumping and control installations, and peripheral equipment—of systems that enable sustainable heat and cold storage in the ground.
The standard distinguishes between different sub-areas such as design, installation, and management, and makes a clear distinction between applications for private homes and projects for commercial and social real estate. BRL 6000-21 is part of the broader BRL 6000 series for installations in the energy and installation sector. Read more about the general
BRL 6000 certification
here and view the complete overview of our BRL certifications.
Why is BRL 6000-21 certification important?
Certification according to BRL 6000-21 offers both companies and clients clear quality guarantees. It is a legal requirement that work on geothermal energy systems be carried out by certified professionals — without a BRL 6000-21 certificate, a company is not allowed to design or install above-ground thermal energy storage systems.
Key benefits of certification:
- Certified quality: the certificate confirms that your organization complies with the requirements of the standard and applicable laws and regulations.
- Increased confidence: clients view a certified company as more reliable and knowledgeable.
- Market access: without BRL certification, you cannot participate in projects involving geothermal energy systems.
BRL 6000-21 certificate: what does it entail?
A BRL 6000-21 certificate is a certificate that an organization receives after an independent certification body—such as DEKRA—has determined that the business processes meet the requirements of the assessment guideline. This certificate may relate to one or more activities, such as:
- Designing power plants for geothermal energy systems
- Installation of above-ground technical components
- Managing and maintaining existing systems
By obtaining this certificate, you demonstrate that your organization has implemented the required procedures and quality assurance measures for all relevant activities within BRL 6000-21.
DEKRA's role in BRL 6000-21 certification
DEKRA is accredited by the Dutch Accreditation Council (RvA) to certify companies according to the BRL 6000-21 standard.
During the certification process, DEKRA objectively assesses whether an organization meets the requirements of this assessment guideline. DEKRA auditors test the procedures, processes, and implementation against the normative criteria for the above-ground part of geothermal energy systems. Based on this, they determine whether the BRL 6000-21 certificate can be awarded.
Who is BRL 6000-21 relevant for?
This certification is valuable for various organizations within the installation and energy sector, such as:
- Thermal energy storage system installers
- Technical installation companies
- Consulting firms specializing in renewable energy
- Ground source energy system administrators
They can demonstrate that they comply with the applicable quality standards by means of a valid BRL 6000-21 certificate. This also applies to the legal requirements for working on geothermal energy projects.
Take the first step towards BRL 6000-21
BRL 6000-21 certification is required by law, offers certainty to clients, and strengthens your company's competitive position. DEKRA is your independent audit partner in obtaining this certification. Would you like to have your organization certified for BRL 6000-21? Please contact us to discuss the options or request a customized quote.
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