Vertiv GL840ES-3242-B-MS 44U Open-Frame Server Rack Enclosure
Overview
The Vertiv GL840ES-3242-B-MS is a 44U, 32-inch-wide by 42-inch-deep server rack enclosure finished in black — a configuration sized for mid-density data center rows, IDF closets, and security operations center equipment buildouts where you need a structured, accessible cabinet without going to a full 48-inch-deep footprint. The GL840ES-3242-B-MS ships with mesh contour front and rear doors, a form factor that matters when thermal management is non-negotiable in tightly packed equipment rooms.
This unit sits within Vertiv's ES Cabinet line, which spans a wide configuration matrix: heights from 24U through 52U, widths from 24 to 32 inches, depths of 42 or 48 inches, and color choices of black or winter white. That breadth makes the Vertiv ES Cabinet series a practical standard for facilities managers and integrators who want a single vendor across mixed-density deployments. The 3242 in the model number (often searched as GL840ES 3242 B MS) encodes the 32-inch width and 42-inch depth of this specific unit.
Key Features
- 44U Usable Height: 44U gives you roughly 77 inches of rack space — enough to house a full NVR stack, PoE switch tier, UPS, and patch panels in a single cabinet without overflow to a second unit. That matters in physical security buildouts where cable runs between cabinets add cost and failure points. Browse the full range of network video recorders that fit a 44U footprint.
- 32-Inch Width: Standard 19-inch EIA rails fit inside a 32-inch-wide enclosure with room for cable management arms on both sides — a meaningful difference versus a 24-inch-wide cabinet where side cable management becomes a compromise. If your equipment room has constrained aisle width, confirm floor tile spacing before ordering.
- 42-Inch Depth: The 42-inch depth accommodates most 1U and 2U servers, switches, and NVR appliances without wasted space behind equipment. It's the right call when you don't have the floor footprint for a 48-inch-deep unit but still need to handle full-depth blade chassis or high-density GPU servers — check your deepest component before finalizing.
- Mesh Contour Front and Rear Doors: Mesh perforated doors deliver passive airflow without requiring the cabinet to be open — a direct reduction in particulate ingress compared to open-frame racks. In a physical security environment where cameras, NVRs, and access control servers run 24/7, sustained thermal management at the enclosure level prevents premature component failure. The contour profile also provides a finished appearance appropriate for executive briefing rooms and shared IDF spaces.
- Optional Split Mesh Rear Door: The ES line supports a split mesh rear door configuration, which lets technicians access the rear of equipment in the lower half of the cabinet without opening the full-height rear panel — useful in tight rows where swing clearance is limited. Confirm door configuration at time of order.
- Black Finish: The black color variant blends into standard data center aesthetics and physical security control rooms. Winter white is available within the ES family for environments where contrast or room branding differs — the GL840ES-3242-B-MS is specifically the black unit.
- Width Scalability Across Family: If 32 inches is wider than your floor plan allows, the ES family also ships in 24-inch and 30-inch widths at the same 44U height, allowing a consistent visual and structural standard across cabinets of different widths in the same row.
- Depth Options in Family: The 42-inch depth variant in this SKU pairs with a 48-inch-deep sibling for deployments running full-depth blade servers or high-density hyperconverged nodes that need rear clearance. Selecting the correct depth at procurement avoids retrofit costs later. See the server rack cabinet category for depth comparisons.
Integration and Compatibility
The GL840ES-3242-B-MS follows EIA-310 standard 19-inch rail spacing, which means it accepts the full range of rack-mount equipment without adapter kits: 1U through nU switches, NVR appliances, KVM units, UPS systems, and patch panels. Physical security integrators deploying PoE switches alongside NVR stacks will find the 32x42 footprint appropriate for mid-density security headend buildouts — typically 8 to 16 camera channels per rack unit of NVR, depending on the platform.
The enclosure is not pre-configured with a specific PDU, KVM, or cable management system — those are selected separately based on load calculations and cable plant design. For data center infrastructure deployments, factor in PDU mounting depth against the 42-inch interior depth when specifying accessories.
Frequently Asked Questions
Q: What is the usable rack unit height of the GL840ES-3242-B-MS?
A: The GL840ES-3242-B-MS provides 44U of usable rack space within the ES Cabinet enclosure at 32 inches wide and 42 inches deep.
Q: What door configurations are available on the GL840ES-3242-B-MS?
A: The ES Cabinet line supports mesh contour front and rear doors, mesh contour front with split mesh rear, and clear door options. The GL840ES-3242-B-MS ships with mesh contour front and rear doors as the standard configuration.
Q: Is the GL840ES-3242-B-MS available in colors other than black?
A: The ES Cabinet family includes a winter white color variant. The GL840ES-3242-B-MS is specifically the black configuration. A separate SKU covers the winter white finish at the same 32x42 dimensions.
Q: What depths and widths are available in the Vertiv ES Cabinet line?
A: The ES Cabinet family spans widths of 24, 30, and 32 inches, depths of 42 and 48 inches, and heights from 24U through 52U. This allows consistent cabinet standards across mixed-density rows in the same facility.
Q: Does the 32-inch width accommodate standard 19-inch rack-mount equipment and cable management arms?
A: Yes. The 32-inch-wide enclosure fits standard EIA-310 19-inch rails with room on both sides for cable management arms — an advantage over 24-inch-wide cabinets where side cable management clearance is typically insufficient for arms on both sides simultaneously.
The GL840ES-3242-B-MS hits a configuration sweet spot that I see integrators reach for repeatedly in mid-density physical security headend builds: 44U of height in a 32-inch-wide, 42-inch-deep footprint with mesh contour doors front and rear. That 42-inch depth is the detail I'd flag first — it's deep enough for full-depth 1U NVR appliances and managed PoE switches, but it won't eat floor tile the way a 48-inch unit does in a constrained IDF closet or security operations center.
Technical Highlights:
- 44U Capacity: In a typical physical security headend — NVR, core switch, PoE distribution, UPS, and KVM — 44U absorbs the full stack without spilling to a second cabinet, which keeps inter-cabinet cable runs out of the design entirely.
- Mesh Contour Doors (Front and Rear): Passive airflow through perforated mesh means you're not relying on door-open policies to keep equipment cool. In a locked security room where access is restricted, closed-door thermal management is the only option that actually works in practice.
- 32-Inch Width: The extra 8 inches versus a 24-inch-wide cabinet is not cosmetic — it's where your cable management arms live. Running structured cabling neatly in a 24-inch enclosure alongside full-depth equipment is a fight; the 32-inch body ends that fight before it starts.
Deployment Considerations:
- At 42 inches of interior depth, verify the deepest component in your BOM before finalizing — some high-density hyperconverged nodes and certain full-depth UPS units push past 40 inches and require the 48-inch-deep sibling SKU in the ES line.
- The GL840ES-3242-B-MS ships as a cabinet only — PDU, KVM, cable management, and mounting rails are specified separately. Factor PDU mounting depth into your layout before the cabinet arrives on site; retrofitting a side-mount PDU in a loaded cabinet is avoidable work.
This cabinet is the right call for physical security integrators building a dedicated headend in a shared IDF or a purpose-built security operations room where you need a finished, thermally managed enclosure at standard 19-inch rail spacing — not an open-frame rack that collects dust and requires a separate lockable door kit.
