To determine the height of the wall rack cabinet you need, you need to add up the total height of the equipment. 1U (or rack unit) is equal to 1.75 inches, so a 10U enclosure can hold equipment with an overall height of 17.5 inches. A 2U server will occupy two of the 10 available rack units. Be sure to accurately assess the amount of rack space you need today and take into account future growth.
2. Determine the depth of the rack
Wall-mounted rack cabinets feature adjustable mounting depths from a minimum of 3 or 17 inches to a maximum of 16.5, 20.5, or 32.5 inches. To determine the maximum depth you need, measure the depth of the device and add 3 inches to allow room for wiring. Cabinets with a maximum depth of 20.5 inches can accommodate equipment with a maximum depth of 17.5 inches.
3. Total your equipment weight
Wall mount racks have weight restrictions. Make sure that the capacity of the rack is greater than the total weight of the installed equipment. Also check to make sure you have the proper studs on the wall to support the rack and accommodate the weight of the equipment.
4. Consider if you need any special features
Most wall-mounted rack cabinets come with a variety of options and special features such as perforated metal or plexiglass front doors depending on your airflow requirements, locking front doors for added security, heavy-duty rollers for easy installation, and hinged wall brackets that swing away from wall for easy access to equipment and wiring.