Vertiv GL840CL-3036-3MM Colocation Cabinet 3-Bay 14U 30"W x 36"D

Overview

The Vertiv GL840CL-3036-3MM is a three-bay colocation cabinet designed for shared data center environments where multiple tenants or equipment owners need individually managed rack space within a single enclosure footprint. At 30 inches wide and available in 36-inch, 42-inch, or 48-inch depth configurations, this cabinet gives facilities managers real flexibility to match the enclosure depth to actual cable run and airflow requirements rather than over-provisioning on space. If you're outfitting a colo cage, a multi-tenant edge closet, or a modular campus data room, the GL840CL-3036-3MM (often searched as GL840CL 3036 3MM) is worth a close look before you spec a bank of individual single-tenant cabinets.

Key Features

• Three-Bay Configuration: Three independent 14U bays within one cabinet chassis means you can segment equipment by tenant, department, or function without requiring three separate cabinet footprints on your raised floor — that's a meaningful floor-space and PDU-circuit saving in high-density colo environments where per-square-foot costs are real.
• Variable Depth: 36", 42", or 48": Selecting the right depth upfront matters — a 36-inch cabinet works for 1U/2U servers and patch panels with clean cable management, while deep 2-post rails or high-density blade infrastructure typically warrants 42 or 48 inches. Ordering the correct depth avoids the common retrofit problem of doors that won't close around rear cabling.
• Mesh Front and Rear Doors: The standard mesh front/rear door option maximizes passive airflow through the cabinet — critical in colo environments running hot-aisle/cold-aisle containment where restricting airflow at the cabinet door is a primary cause of localized thermal events. Mesh doors do not require active fan assistance for most standard 1U/2U server densities.
• Plexi Front Door Option: The clear plexi front door is the right call when visual inspection of indicator lights, drive activity, or LCD panels needs to happen without opening the door — useful for shared environments where you want to verify equipment status across a glass partition without triggering access logs or disturbing adjacent tenants.
• Solid Rear Door with 2 Integrated Fans: The solid rear door variant ships with two built-in fans, converting the cabinet into an active exhaust unit. This matters specifically in environments where hot-aisle containment isn't fully implemented or where a high-density bay is generating more heat than passive convection can manage — the fans provide directed exhaust without requiring external blanking panel engineering.
• Two or Three Clear Bay Dividers: Bay dividers within the enclosure enforce physical separation between tenants — an underrated feature in multi-tenant deployments where cross-bay cable reach or accidental equipment contact is a compliance or liability concern. Clear dividers maintain visual oversight while maintaining defined boundaries.
• Black Finish: The standard black powder coat is the de facto specification for professional data center and colo environments. It photographs cleanly for asset documentation, photographs poorly for contrast-based social engineering (making it harder to read labels and asset tags through cage mesh from a distance), and aligns with the aesthetic standard that most facilities management teams enforce.

Integration and Compatibility

The GL840CL-3036-3MM is designed to integrate into standard data center and colocation environments. The 30-inch width fits within standard raised-floor tile grids and aligns with typical hot/cold aisle cabinet row configurations. The available 36", 42", and 48" depth options accommodate standard EIA-310 19-inch rack equipment, and the variable door configurations allow the cabinet to be matched to the specific airflow and access-control requirements of the installation site. For installations requiring overhead cable management, vertical cable managers, or custom PDU mounting, the cabinet's standard rail and mounting geometry supports industry-standard accessories from major infrastructure vendors. Verify your specific PDU, blanking panel, and rail kit compatibility against the Vertiv GL840 series specification documentation before finalizing the order — particularly if you are mixing rail kits from different manufacturers in a high-density environment.

Frequently Asked Questions

Q: What depth options are available for the GL840CL-3036-3MM?

A: The GL840CL-3036-3MM is available in three depth configurations: 36 inches, 42 inches, and 48 inches. Select the depth based on the deepest equipment you plan to install, accounting for rear cable management space.

Q: What door configurations does the GL840CL-3036-3MM support?

A: The cabinet supports mesh front/rear doors for maximum passive airflow, a plexi (clear acrylic) front door for visual equipment inspection without opening the enclosure, and a solid rear door that ships with two integrated fans for active exhaust in higher-density bays.

Q: How many bays and rack units does the GL840CL-3036-3MM provide?

A: The GL840CL-3036-3MM is a three-bay cabinet with 14U of rack space per bay, providing a total of 42U across the full enclosure — suitable for segmenting equipment by tenant, department, or equipment type within a shared footprint.

Q: Is the GL840CL-3036-3MM suitable for colocation data center environments?

A: Yes. The three-bay segmented layout, variable depth, and choice of mesh, plexi, or solid-with-fans door configurations are specifically suited to shared colocation environments where multiple tenants or equipment owners need separated, individually accessible rack space within a single cabinet chassis.

Q: What is the width of the GL840CL-3036-3MM?

A: The cabinet is 30 inches wide, fitting standard data center floor grid spacing and aligning with typical hot-aisle/cold-aisle cabinet row configurations.

Eden Phillips

The GL840CL-3036-3MM stands out specifically because of the solid rear door with integrated dual fans — that's not a spec to overlook. In a three-bay colo cabinet running even moderate server density, passive exhaust through mesh alone can leave the rear bay running 5–8°C hotter than the front bay. The built-in fans in the solid rear door option give you directed exhaust without needing to engineer an external fan tray or blanking panel stack to compensate.

Technical Highlights:

• Three-Bay 14U Layout: 42U total across three independently accessible bays — lets you allocate and lock segments per tenant without requiring separate cabinet chassis, saving floor tiles and power circuit counts in billed colo space.
• Three Depth Options (36"/42"/48"): The 36-inch depth is the right pick for patch-heavy, compute-light rows; move to 42 or 48 inches the moment you're installing full-depth servers or blade enclosures — rear door clearance becomes critical at those depths.
• Dual-Fan Solid Rear Door: Active exhaust at the cabinet level addresses localized hotspots without retrofitting — particularly relevant in mixed-density rows where one bay is running high-wattage compute next to near-empty storage bays.

Deployment Considerations:

• If your facility uses hot-aisle containment with overhead return, the mesh front/rear door configuration is the natural pick — the solid rear door with fans works against a sealed hot-aisle chimney by pushing heat laterally rather than upward.
• Bay divider configuration (two or three clear dividers) should be confirmed against your tenant count before ordering — clear dividers are correct for visual oversight, but if your SLA requires opaque physical separation, verify the available options with Vertiv before specifying.

This cabinet is a strong fit for edge colo deployments — specifically multi-tenant equipment rooms at campus facilities, carrier hotels, or enterprise branch data closets where you need segmented rack access in a compact, manageable footprint without buildout of full individual cabinets per tenant.