This part of IEC 62610 provides for compatible methods of forced air cooled cabinets assembled with associated subracks and/or chassis in accordance with the IEC 60297 and IEC 60917 series. This design guide contains the following: a) Thermal interfaces of subrack and/or chassis based equipment in a cabinet • Reference temperature • Preferred airflow conditions • Airflow volume conditions • Standard air b) Procedures for determining compatible forced airflow conditions in a cabinet by applying typical thermal interface conditions The drawings used are not intended to indicate product design. They are only explanatory indications for determining forced air-cooling structure. The terminology used complies with IEC 60917-1.