Vertiv GL840ES-3042-W-MSS 44U 30" Wide 42" Deep White Server Cabinet with Split Mesh Rear Door

Overview

The Vertiv GL840ES-3042-W-MSS is a 44U open-frame server and network equipment cabinet built in Winter White — a finish commonly specified in cleanrooms, broadcast facilities, healthcare data closets, and any environment where a standard black enclosure would stand out against white walls or violate aesthetic standards. At 30 inches wide and 42 inches deep, it fits a standard equipment footprint while offering enough front-to-rear clearance for dense 1U/2U servers with cable management arms. The split mesh rear door — the defining feature of this SKU — allows you to route cables through either half independently without fully opening the door, which matters in live environments where partial access keeps airflow intact and reduces the risk of accidentally disturbing adjacent equipment. Explore the full Vertiv rack and enclosure catalog for compatible PDUs, blanking panels, and thermal management accessories.

Key Features

• 44U Usable Height: 44U gives you room to build out a substantial stack — enough for a typical top-of-rack switch, a pair of 2U servers, a patch panel tier, a KVM, and PDUs without running out of space. If your current build is under 30U, you have headroom to grow into this cabinet without a forklift swap-out later.
• 30" Width: Standard 19" EIA equipment mounts on center; the extra width beyond the 19" rail width is occupied by vertical cable managers and side channels. A 30" wide footprint fits comfortably in most raised-floor grid layouts and standard aisle widths. Compare against the 24" and 32" width options in the same GL840ES family if your floor plan is tight or if you need wider side clearance.
• 42" Depth: 42 inches front-to-rear is the practical minimum for full-depth 1U rack servers with cable management arms deployed. It clears most 1U and 2U servers without forcing cable compression. If you're running blade chassis or high-density GPU nodes that exceed 36" in body length, verify the specific server depth plus CMA depth before ordering — 42" is workable but not generous for the deepest platforms.
• Split Mesh Rear Door: The rear door opens as two independent halves rather than a single swing. This means you can open the top half to access patch panels and upper-tier equipment while the lower half stays closed and airflow-sealed — useful during live patching in a co-location or active data closet. Mesh construction maintains consistent rear exhaust airflow rather than trapping hot air behind a solid panel.
• Mesh Contour Front Door: The front door's mesh contour design provides direct cool-air intake to equipment inlets. In a hot-aisle/cold-aisle arrangement, this is the correct door style — a solid or perforated-low-percentage door would restrict intake and raise inlet temperatures. No need to prop the front door open for airflow.
• Winter White Finish: The GL840ES-3042-W-MSS ships in Winter White rather than standard black. Beyond aesthetics, white enclosures are frequently required by facilities standards in hospitals, broadcast control rooms, and light-colored server rooms. If your facility spec sheet calls for white enclosures, this is the variant to order — not a field repaint of a black unit.
• Multiple Configuration Options in Family: The GL840ES line spans 24U through 52U heights and 24", 30", and 32" widths, with 42" and 48" depth options. The network cabinets and server racks category lists the full matrix. If your rack unit count or depth requirement differs, size accordingly from the same product family to maintain consistent aesthetics and accessory compatibility.

Integration & Compatibility

The GL840ES-3042-W-MSS follows standard EIA-310 19" rail spacing, so it accepts standard rack-mount equipment from any vendor without modification. Vertiv's own rack PDUs, vertical cable managers, and blanking panels are designed to fit this enclosure family. When planning a multi-cabinet row deployment, the consistent 30" width of this unit allows flush side-by-side alignment with other 30" GL840ES cabinets for a clean cable bus run between units. For environments that require ground bonding or seismic bracing, verify Vertiv's accessory kit compatibility for the GL840ES footprint before finalizing the order. Cabinet placement in a raised-floor environment should account for the 42" depth plus the rear door swing arc — allow at minimum 36" of hot-aisle clearance behind the cabinet for the split rear door to open fully on both halves.

Frequently Asked Questions

Q: What is the difference between the GL840ES-3042-W-MSS and a standard black GL840ES cabinet?

A: The GL840ES-3042-W-MSS is finished in Winter White rather than the standard black. The physical dimensions (44U, 30" wide, 42" deep), door style (mesh contour front, split mesh rear), and structural specifications are otherwise identical to the equivalent black variant. Specify the white finish when facilities standards or room aesthetics require it.

Q: Does the split rear door on the GL840ES-3042-W-MSS affect airflow compared to a full single-panel rear door?

A: No — both halves of the split rear door are mesh construction, so total airflow area is equivalent to a single-panel mesh rear door of the same dimensions. The split design provides the operational advantage of opening one half while keeping the other closed, preserving partial hot-exhaust containment during live maintenance.

Q: Can I install a cable management arm (CMA) in the GL840ES-3042-W-MSS?

A: The 42" depth is the minimum typically recommended for standard 1U CMAs. Most CMAs add 6–8" to the effective server depth, so confirm your server body length plus CMA depth does not exceed approximately 34–36" to remain within the 42" interior clearance. Vertiv offers CMA kits designed for the GL840ES family — verify part compatibility against your specific server model before ordering.

Q: Is the GL840ES-3042-W-MSS suitable for a co-location or shared data center environment?

A: Yes. The split rear door is particularly practical in co-location environments where hot-aisle access needs to be limited to one zone of the cabinet at a time. The standard 19" EIA rail pattern accepts any vendor's equipment, and the 44U height is a common co-location allocation. Confirm with your co-lo provider that 30" wide cabinets fit within their floor tile grid if raised-floor placement is required.

Q: What other height options are available in the GL840ES family?

A: The GL840ES line is available in 24U, 42U, 44U, 48U, and 52U heights, with widths of 24", 30", and 32", and depths of 42" or 48". The GL840ES-3042-W-MSS is the 44U / 30" wide / 42" deep variant in Winter White with a split mesh rear door. Select the appropriate height and depth for your equipment inventory and projected growth.

Eden Phillips

The GL840ES-3042-W-MSS is one of those SKUs that gets specified for a specific reason: the Winter White finish. In my experience, the moment a facility manager hands you a spec sheet calling for white enclosures — hospital IT closets, broadcast control rooms, government research facilities — you stop shopping and order this unit. The 44U height at 30" wide and 42" deep is a practical, well-proportioned footprint that handles a standard compute stack without wasted floor space.

Technical Highlights:

• Split Mesh Rear Door: Opens in two independent halves, so you can access the upper cable tier during a live patching event without breaking rear containment on the lower half — a real operational advantage in any environment where you can't fully power down before opening the cabinet.
• 44U Height: Provides enough rail space for a full compute build — top-of-rack switch, dual servers, patch panel, KVM, and dual PDUs — with room remaining. The GL840ES family extends to 52U if you anticipate significant growth, and the same accessories carry across heights.
• 42" Depth with Mesh Contour Front: The mesh front door keeps intake unrestricted in a cold-aisle arrangement. The 42" depth clears most 1U rack servers with standard cable management arms, though blade chassis deployments should be depth-verified before ordering.

Deployment Considerations:

• Plan the rear door swing arc carefully — a split rear door still requires approximately 36" of hot-aisle clearance per half-panel swing; in tight rows with back-to-back cabinets, measure before you floor-mount.
• The Winter White finish is a facilities match, not a structural upgrade — if your environment doesn't require white enclosures, the equivalent black variant may have shorter lead times depending on regional stock availability.

The GL840ES-3042-W-MSS is the right call for a healthcare data closet, broadcast infrastructure rack, or any facility where white enclosures are a hard requirement and a 44U / 30" x 42" footprint fits the floor plan — particularly where the split rear door enables live cable management without full hot-aisle exposure.