BS EN 15265:2007 Energy performance of buildings. Calculation of energy needs for space heating and cooling using dynamic methods. General criteria and validation procedures
This European Standard specifies a set of assumptions, requirements and validation tests for procedures used for the calculation of the annual energy needs for space heating and cooling of a room in a building where the calculations are done with a time step of one hour or less.
This European Standard does not impose any specific numerical technique for the calculation of the room heating or cooling need and the internal temperatures of a room.