To achieve the best energy efficiency class A in accordance with EN 15232, Beckhoff offers the TF8040 TwinCAT 3 Building Automation library that supports room automation functions based on the VDI 3813 guidline. Comprehensive room automation exploits the interdependencies of facade control, lighting and climate control to create a pleasant room atmosphere. At the same time, efficient room and zone control also affects the primary systems: the heating and cooling demands and the air quantities are regulated according to need. When designing the heating, cooling, ventilation and air conditioning systems, the needs arising from the specific use of the building must be taken into account. A further benefit lies in the way in which a majority of the optimization functions can be realized within the software on a single system during commissioning and operations. As a result, no reconstruction work impedes operation and the time required for software adjustment also remains within reasonable limits. In certain cases, many modifiations can be made by accessing the system remotely, without the need for a service technician to visit the site.