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Certification needed for work on gas appliances

This information is provided by

Netherlands Enterprise Agency, RVO

Effective date: 1 April 2023

A certification is needed to work on boilers or hot water tanks that run on gas. This is to improve safety. Read more.

What changes?

Does your company (or do you) work with boilers or gas-driven hot water tanks? Or do you handle plumbing for air supply or fume removal? You will need to be certified to install or maintain gas appliances or pipes. If you do not have a valid certificate of proficiency (CO-certificering), you are no longer allowed to perform these activities. This is then considered an offence. This legal obligation is introduced to prevent accidents with carbon monoxide.

For whom?

  • installation agencies
  • (self-employed) installation technicians


Installers need a valid certificate from 1 April 2023.

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This information is provided by

Netherlands Enterprise Agency, RVO
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