This standard deals with procedures for the assessment of electricity generation within the direct building environment through wind power systems and energy performance calculation of wind power systems. The wind power systems described in this document are small plants as they may occur in domestic production and use of electricity in connection with buildings. This standard covers wind generation power systems d" 75 kW. This standard does not cover sizing or inspection of wind power systems. Other generation systems are covered in other sub modules of part M3-8.