Height units

The height unit (HE) is a standardized unit of measurement that is used in particular for 19-inch racks and UPS systems is used. It specifies the height of a device or component that can be installed in a 19-inch rack. One height unit (HE) corresponds to 44.45 mm in height. This standard is used worldwide to ensure the compatibility of devices installed in racks, whether in data centers, IT infrastructures or industrial environments.