The objective of the framework agreement is to ensure stable access to professionally qualified services within ventilation, heating and cooling, including: * Service and function control of technical installations * Preventive and corrective maintenance. * Replacement of technical HVAC components and machines when further maintenance is not appropriate. * Delivery of service parts * Mapping systems * Condition evaluations and cost estimates * Consultancy and support in connection with applicable measures, such as engineering design services for new sites and/or engineering design services for good systems connected to existing installations. Furthermore, quality assurance on other engineering design basis can also be executed.