Vertiv GL840ES-2442-B-MSS 44U Black Server Rack Enclosure with Split Mesh Rear Door
Overview
The Vertiv GL840ES-2442-B-MSS is a 44U open-frame-style enclosed rack cabinet — 24 inches wide, 42 inches deep, finished in black — configured with a mesh contour front door and a split mesh rear door. The split rear door is the defining feature here: it divides vertically at the center, so you can open either half independently. In high-density deployments where rear cable management, PDU access, or hot-swap maintenance happens constantly, that means you can work the right side without swinging a full door into adjacent equipment or a wall. The GL840ES-2442-B-MSS (often searched as GL840ES 2442 B MSS) is part of Vertiv's Vertiv rack enclosure line, which spans multiple heights, widths, and door configurations to match varied data center and network room footprints.
Key Features
- 44U Usable Height: 44U provides enough vertical space to mount high-density patch panels, 1U switches, and 2U servers in the same enclosure without compromise — more headroom than a 42U standard where blanking panels eat into real estate.
- 24" Width: The narrower 24-inch footprint fits in constrained telecom rooms, wiring closets, and edge deployments where a standard 30-inch cabinet won't clear the floor plan. Verify your equipment's mounting flange width before ordering — most 19-inch rackmount gear fits, but deeper chassis may interact with the 42-inch depth.
- 42" Depth: At 42 inches, this cabinet accommodates most 1U–2U networking gear and mid-depth servers. If you're running deep 4-post servers (some chassis exceed 36 inches), measure the installed depth including cable bend radius before committing to this footprint.
- Split Mesh Rear Door: Splitting the rear door into two independently hinged halves reduces the clearance needed behind the rack. In rows where racks sit back-to-back or close to a wall, a single full-swing door can be impractical. The mesh pattern maintains airflow continuity — hot exhaust moves through rather than pooling.
- Mesh Contour Front Door: Front mesh allows intake airflow to reach equipment without restriction, supporting contained hot-aisle/cold-aisle arrangements and reducing reliance on blanking panels to maintain pressure differentials.
- Black Finish: The black colorway suits standard data center aesthetics and hides surface wear in high-traffic environments. Vertiv also offers this family in Winter White for broadcast, healthcare, and office deployments where appearance matters more.
Integration and Compatibility
The GL840ES-2442-B-MSS is designed around the EIA-310 19-inch equipment standard — the same mounting geometry used by virtually all commercial networking, server, and network video recorder hardware. The 44U height and split rear configuration are common in deployments pairing this enclosure with PoE switches, patch panels, and power distribution units. If your environment uses a hot-aisle containment system, verify that the containment curtains or doors accommodate the 24-inch cabinet width rather than assuming standard 30-inch geometry. For full rack accessory compatibility — cable management arms, blanking panels, PDU mounting brackets — cross-reference part numbers from the rack accessories category against the 24-inch rail spacing this unit ships with.
Frequently Asked Questions
Q: What does the MPN GL840ES-2442-B-MSS encode — how do I read the model number?
A: The model number encodes the cabinet configuration: 44U height, 24-inch width, 42-inch depth, Black finish, and Split Mesh rear door (MSS). This lets you verify the configuration without pulling a separate spec sheet.
Q: Can the split rear door be removed entirely for cable-intensive installations?
A: Door removability depends on the hinge hardware specific to this GL840ES series — the available evidence does not confirm tool-free removal. Contact Vertiv pre-sales or reference the installation guide to confirm before planning a no-door configuration.
Q: Is the GL840ES-2442-B-MSS compatible with standard 19-inch rackmount equipment?
A: Yes. The enclosure is built to EIA-310 19-inch standards, which covers virtually all commercial networking, server, and AV equipment. Confirm that your deepest chassis fits within the 42-inch interior depth including cabling clearance.
Q: What is the difference between the Black and Winter White color options in this family?
A: The GL840ES-2442-B-MSS ships in Black. Winter White variants are available in the same family for environments where aesthetics matter — broadcast studios, healthcare, open-office IT rooms. The structural and airflow specs are identical between colorways.
Q: Does this cabinet support hot-aisle/cold-aisle containment configurations?
A: The mesh front and split mesh rear doors are airflow-permeable, which is compatible with standard hot-aisle/cold-aisle arrangements. For active containment systems, verify that containment hardware is rated for 24-inch cabinet width, as most containment kits are sized for 30-inch standard footprints.
The GL840ES-2442-B-MSS sits in the narrower end of the Vertiv GL840ES family at 24 inches wide and 42 inches deep — a footprint that comes up often in edge deployments and wiring closets where a standard 30-inch cab simply doesn't fit. The split mesh rear door is the configuration detail I'd call out first: two independently hinged halves rather than one full-swing door means you can service the rear of the rack in tight row spacing without clearing a full door arc.
Technical Highlights:
- 44U Height: Two rack units taller than the common 42U standard — a small delta that adds meaningful space when you're stacking 1U patch panels, blanking panels, and ToR switches.
- 24" × 42" Footprint: Narrower and shallower than full-size data center cabs; fits through standard 36-inch doorways and into closets sized for telco equipment.
- Split Mesh Rear (MSS): Each half-door opens independently, cutting required rear clearance roughly in half compared to a single full-swing door — relevant when rack rows are 36 inches or less apart.
Deployment Considerations:
- The 24-inch width means most standard 30-inch PDU mounting brackets and containment curtains will not fit without adapter hardware — source accessories sized for 24-inch rails.
- At 42 inches of usable depth, verify that any chassis with rear-exiting cables (especially dense fiber runs) has enough room for cable bend radius before the rear door closes flush.
This cabinet is a strong fit for edge network rooms, IDF closets, and small data center rows where footprint is constrained and rear access frequency justifies the split-door configuration over a simpler single-panel design.
