This International Standard provides for compatible methods of configuring forced air cooled cabinets assembled with associated subracks and/or chassis in accordance with the IEC 60297 and IEC 60917 series. This International Standard contains the following matters: a) Thermal interfaces of subracks and/or chassis-based equipment in a cabinet, described by: • 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 for explanatory indications for determining forced air cooling. The terminology used complies with IEC 60917-1.