Since February 2009 De Kleijn is ISO 9001 certified for engineering and consultancy in energy, energy saving and ventilation systems.

ISO 9001 logoWe believe it is important that our customers are and remain satisfied. As a small organization our clients have direct contact with one of our project managers. This allows any problems to be noticed and solved quickly. After finishing a project, we will ask for your impression and remarks on our work using a customer satisfaction survey. All projects and survey results are internally evaluated. This will help to maintain and improve our level of quality.