The scope of this European Standard is- To define the procedure how the calculation methods to determine the temperatures, sensible loads and energy demands for the rooms shall be used in the design process.- To describe the calculation methods to determine the latent room cooling and heating load, the building heating, cooling, humidification and dehumidification loads and the system heating, cooling, humidification and dehumidification loads.- To define the general approach for the calculation of the overall energy performance of buildings with room conditioning systems- To describe one or more simplified calculation methods for the system energy requirem