BS EN 15265:2007

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and units
   3.1 Terms and definitions
   3.2 Symbols and units
4 Procedures
5 Basic assumptions
6 Data requirement
   6.1 General
   6.2 Climatic data
   6.3 Surface heat transfer coefficients
   6.4 Solar distribution
   6.5 Air ventilation and air infiltration
        6.5.1 General
        6.5.2 Infiltration
        6.5.3 Ventilation
   6.6 Internal load
   6.7 Internal design temperature
   6.8 Heating and cooling system device
        6.8.1 General
        6.8.2 Convective device
        6.8.3 Cooling or heating surface device
7 Report of the calculation
   7.1 General
   7.2 Input data
   7.3 Results of calculation
8 Validation tests
   8.1 General
   8.2 Room and components description
   8.3 Test cases description
        8.3.1 Initial tests
        8.3.2 Validation tests
9 Validation criteria and reference results
10 Validation test report
   10.1 General
   10.2 Input data
   10.3 Output results
Annex A (normative) - Climatic data for the validation examples
Bibliography

Describes 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 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. The purpose of this European Standard is to validate calculation methods used to: ? assess the energy performance of each room of a building; ? provide energy data to be used as interface with system performance analysis (heating, cooling, ventilating, lighting, domestic hot water etc). The validation procedure is used to check the energy need for space heating and cooling based on a transient sensible heat balance model, taking into account: ? the external surface heat balance; ? the conduction through the building envelope; ? the thermal capacities of external and internal structures; ? the internal surface heat balance; ? the air heat balance; ? the heat balance solution method. All other aspects are given either by prescribed boundary conditions or by input data and are not part of the model validation. It is assumed, that for all these other matters e.g. embedded heating and cooling systems, prescriptive models have to be used according to existing European Standards. The system performance analysis and moisture balance are not within the scope of this European Standard.