Cold aisle containment encloses the cold aisles to ensure only cold air is supplied to servers. This approach is normally used with in-row cooling and raised floors and is more common in retrofits. By isolating the cold aisle, containment reduces unintended mixing of cold supply air with hot exhaust air, maintaining uniform, predictable. Cold Aisle Containment isolates the cooled supply air from the cooling units within direct proximity of the air intake of critical equipment. T equipment is kept at an effective temperature. in inem Feuchtraum oder im Freien gilt als nicht bestimmungsgemäß.