If your cabinets are only partially populated and have perforated ventilation holes in the front and rear, you may not need additional cooling fan kits. Server manufacturers typically recommend a minimum perforation factor for the doors of the cabinets that would be used to house their servers and this is typically from 63% upwards; to allow adequate air flow from front to rear.
21U Server Racks and Data Cabinets
21U server racks and data cabinets from Server Room Environments on short lead times with a range of options and features to meet wide set of applications: server room, datacentre, office, retail, distribution, industrial and other harsh environments. This range of 21U racks ranges from budget priced enclosures in our Value range to Premium models made from thicker steel to cabinets designed for roadside and extreme environments. For each of the racks there is a range of accessory to allow customisation of the cabinets on site in terms of shelves and trays, cable management and blanking plates, in-rack cooling options and temperature monitoring.
21U Server Cabinets Guide
When selecting a rack or cabinet there are several factors to consider.
Rack Height
A 21U rack or cabinet can house equipment whose total height when placed into the rack is no more than 0.93m. Care therefore has to be taken when selecting a rack to make sure that there cabinet height is sufficient to house the IT server, networking peripheral or IoT device.
| U Height | Metres | Centimetres | Millimetres | Feet | Inches |
|---|---|---|---|---|---|
| 21U | 0.93m | 93.35cm | 933.45mm | 3.06ft | 36.75" |
For referrence 1U=1.75inches or 44.45mm.
Rack Width
The standard rackmount width is 19inches (482.6mm) and cabinets are typically available in 600mm or 800mm width. Most products will either fit to the front rack pillars using cage nuts onto flanges attached to the rack-mountable device, or slide rails running from the front to the rear pillars or sit on internal shelves or slide-out trays. Room should be left around the rack for adequate air flow and access.
Rack Depth
The depth of cabinet available range from 600-1200mm. Care should be taken when selecting a rack depth to ensure that it is suitably long enough for the equipment to be housed including any necessary space for cables (bend radius) and connection access. How to manage cables is important for any rack size for easy cable identification and to avoid accidental disconnection.
Open or Closed Racks
The majority of server racks and data cabinets supplied are enclosed rather than open frames. An enclosed cabinet with a front and rear door and side panels is more secure and will provide with more efficient airflow management.
Server Room Environments are a leading and trusted UK server racks supplier. We offer superbly priced and high-quality server racks, open frames and cabinets (floor standing and wall mounted) tailored to your requirements. We hold ISO9001, ISO27001 and SafeContractor certifications amongst several others, demonstrating our commitment to the supply of quality of products and the delivery of services safely and securely to clients across the UK and overseas. For more information or to check a price or how fast we can deliver a 21U server rack, open-frame or cabinet, please contact our projects team.
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