Vertiv GL790ES-3042-B-MS 42U Server Rack Enclosure
Overview
The Vertiv GL790ES-3042-B-MS is a 42U open-frame rack enclosure sized at 30 inches wide by 42 inches deep in black — a purpose-built cabinet for mid-density IT and security infrastructure deployments where thermal management and physical access control both matter. The 30-inch width hits a practical middle ground: narrower than a 32-inch rack (easier to place in tight IDF closets or server rooms with restricted aisle clearance) while still accommodating standard 19-inch rackmount equipment with room for side cable runs. At 42U, you get enough vertical real estate for a full NVR stack, PoE switching layer, and patch infrastructure without committing to a floor-to-ceiling 48U or 52U enclosure. For Vertiv rack and enclosure solutions, this cabinet sits in the Geist/Vertiv ES series — a line built for commercial and enterprise deployments rather than telco or hyper-dense compute.
Key Features
- 42U Height: Enough vertical space to house a complete security or IT stack — NVRs, PoE switches, patch panels, UPS, and cable management — without the footprint of a 48U or 52U cabinet. If your design calls for future expansion, the same ES series offers 44U, 48U, and 52U variants in this width/depth combination.
- 30-Inch Width: Fits standard 19-inch rackmount equipment while keeping the overall cabinet footprint manageable. In constrained server rooms, wiring closets, or security head-end rooms, the 30-inch width versus a 32-inch wide cabinet can mean the difference between a clean two-row layout and a forced single-row squeeze against the wall.
- 42-Inch Depth: Accommodates most 1U–4U NVRs, switching gear, and cable management trays without forcing awkward cable bends at the rear door. The 42-inch depth is the entry-level choice for the ES series; a 48-inch depth variant exists if you're housing blade-style or deep 1U servers.
- Mesh Contour Front and Rear Doors: Perforated mesh doors promote passive airflow through the cabinet — critical for densely populated racks running 24/7 surveillance or network loads. Mesh doors eliminate the hotspot buildup that solid-panel doors create, and the contour profile provides structural rigidity without added weight. The rear split-mesh door option (also available in this series) simplifies cable routing through the rear plane mid-deployment.
- Black Finish: Standard black finish integrates cleanly into security head-end rooms, data centers, and NOC environments without the aesthetic mismatch of winter-white cabinets in modern facilities. The same GL790ES series is offered in Winter White for environments where that matters (clean rooms, healthcare, certain retail back-of-house installs).
- ES Series Multi-Configuration Platform: The GL790ES-3042-B-MS (often searched as GL790ES 3042 B MS) shares a platform with 24U, 44U, 48U, and 52U height options, plus 24-inch and 32-inch width variants — so you can standardize on Vertiv ES series mounting hardware, accessories, and cable management across a multi-rack deployment without requalifying a different product line per row.
Integration and Compatibility
The GL790ES-3042-B-MS is designed for standard 19-inch rackmount equipment — the universal form factor across network video recorders, managed PoE switches, patch panels, KVM units, and UPS systems. If you're building a surveillance head-end, this enclosure pairs naturally with rackmount NVRs from Axis, Hanwha, Genetec, or Milestone appliance vendors, alongside PoE switches for camera power distribution. For power protection, a rackmount UPS drops into available U-space within the same cabinet to provide runtime continuity for connected recorders and switches during outages. The mesh door design works with active cooling (blanking panels and in-row cooling) as well as passive convection in well-ventilated rooms — plan your airflow before populating the rack, since a fully loaded 42U security stack can generate significant heat that mesh alone won't dissipate without deliberate hot-aisle/cold-aisle separation or supplemental cooling.
Frequently Asked Questions
Q: What are the exact dimensions of the GL790ES-3042-B-MS?
A: The GL790ES-3042-B-MS is a 42U enclosure with a 30-inch width and 42-inch depth in black. External height will vary based on caster/leveling foot configuration — verify with Vertiv's published dimensional drawings for precise floor-to-top measurements before installation.
Q: What door configurations are available on this enclosure?
A: The GL790ES series supports Mesh Contour Front/Rear, Mesh Contour Front with Split Mesh Rear, and Clear door options. The GL790ES-3042-B-MS is a black-finish unit in this series — confirm the specific door configuration included with your order at time of purchase.
Q: Can the GL790ES-3042-B-MS accommodate a rackmount UPS and NVR in the same cabinet?
A: Yes. At 42U, the enclosure has enough vertical space to house a mid-size rackmount UPS, one or more NVRs, a PoE switch layer, and patch infrastructure — a typical configuration for a self-contained security head-end. Plan your load distribution (heavy UPS units low, lighter switches and NVRs above) and verify the cabinet's static load rating before finalizing the design.
Q: Is the GL790ES-3042-B-MS available in other sizes or colors?
A: The Vertiv GL790ES series is available in multiple heights (24U, 42U, 44U, 48U, 52U), widths (24-inch, 30-inch, 32-inch), depths (42-inch, 48-inch), and colors (Black, Winter White) — allowing you to select the configuration that matches your rack density and facility requirements.
Q: Does this enclosure ship assembled?
A: Vertiv ES series cabinets typically ship partially assembled and require on-site finishing. Confirm shipping and assembly requirements with your order, as freight class and delivery method will depend on cabinet weight and destination.
The GL790ES-3042-B-MS is one of those enclosures I recommend when an integrator needs a real cabinet — not an open-frame relay rack — but can't burn floor space on a 32-inch wide unit. The 30-inch width with 42-inch depth gives you a practical form factor for a security head-end: deep enough to close the rear door cleanly on a 1U NVR with its cables dressed, narrow enough to fit two rows in a room that a 32-inch cabinet would turn into a single-row closet.
Technical Highlights:
- 42U Height: Enough vertical real estate for a complete surveillance stack — NVR, PoE switching, patch, and UPS — without the added cost and floor footprint of a 48U or 52U enclosure. If you're building a multi-rack row, the ES series scales to 52U in the same platform so your accessories and cable management stay consistent.
- Mesh Contour Doors: The perforated mesh design is not cosmetic — passive airflow through a mesh front/rear pair can drop cabinet operating temps meaningfully compared to solid-panel doors in a room without raised floor cooling. For 24/7 surveillance loads (NVR plus switch plus UPS), that matters over a multi-year deployment lifecycle.
- 30x42-Inch Footprint: The 30-inch width is the right call when your room layout is constrained but your equipment is standard 19-inch rackmount. The 42-inch depth covers most 1U–4U security appliances without forcing cable management compromises at the rear.
Deployment Considerations:
- The 42-inch depth is the shallower option in the ES series — if you're housing any deep 1U compute servers (some run 28–30 inches alone), measure cable slack before specifying this depth. The 48-inch depth variant gives more rear-door clearance for dressed cables.
- Mesh doors improve airflow but provide less physical security than solid-panel doors. In shared or semi-public spaces (telecom rooms accessible to building tenants, for example), evaluate whether a solid or lockable mesh door with reinforced hinges is the better fit for the site's physical security posture.
This enclosure is the right call for a dedicated security head-end room or IDF-adjacent wiring closet where you're running a self-contained NVR-plus-switching stack, space is moderately constrained, and passive thermal management is acceptable given the room's ambient conditions.
