Vertiv GL48N12-24-B-AC22 26U NEMA 12 Wall-Mount Enclosure
Overview
The Vertiv GL48N12-24-B-AC22 is a wall-mount equipment enclosure engineered for environments where dust and drip protection matter — NEMA 12 construction keeps industrial particulates and non-pressurized water out of your active network or control equipment. Available in three height configurations (12U at 24", 19U at 36", and 26U at 48"), the GL48N12-24-B-AC22 (often searched as GL48N12 24 B AC22) accommodates a range of rack-mount equipment densities without requiring a full floor-standing cabinet footprint. The 24" depth version suits shallower wall cavities and lighter equipment loads; the 30" depth option handles deeper switches, UPS units, and patch panels. Explore the full Vertiv enclosure and infrastructure catalog for companion products across power, cooling, and rack systems.
Key Features
- NEMA 12 Protection: Sealed construction blocks dust, lint, and dripping or splashing non-corrosive liquids — the right rating for light industrial spaces, manufacturing floors, and mechanical rooms where an open-frame rack would accumulate debris and cause premature equipment failure.
- Three Height Options (12U / 19U / 26U): Match the enclosure to your actual equipment count. The 26U configuration at 48" height fits a full complement of switches, patch panels, and a small UPS without wasting wall real estate on unused rack space. Pair with a network cabinet or enclosure guide to size correctly before ordering.
- Two Depth Options (24" / 30"): The 24" depth handles 1U/2U switches and fiber panels cleanly. Step up to 30" when you need to seat deeper 1U servers or full-depth UPS units — verify your heaviest component's chassis depth against the usable interior before specifying.
- Integrated and Optional Thermal Management: Ships with a fan/filter configuration and supports field-installed AC units rated at 1000 BTU, 1300 BTU, or 2200 BTU. For high-density switch or compute loads in warm ambient environments, the 2200 BTU AC option keeps internal temps within equipment specs without external ductwork. See enclosure cooling options for compatible AC units.
- AC Cooling Scalability: The "Accepts Optional AC" and "Accepts Optional Fan/Filter" designations mean you can deploy this unit now with passive or fan-assisted cooling and upgrade to active AC later as equipment density grows — no enclosure swap required.
Integration and Compatibility
The GL48N12-24-B-AC22 is designed for standard 19" rack-mount equipment. Wall-mount enclosures in the Vertiv GreenFrame line are commonly deployed alongside PoE network switches and access control head-end equipment in IDF closets, remote network nodes, and security head-end rooms. Confirm rough-in wall blocking and load ratings before installation — 26U of populated equipment at 24" depth represents a significant point load on the mounting surface. Consult a licensed contractor for structural assessment in drywall or metal-stud construction. For rack accessory compatibility such as cable managers, shelves, and blanking panels, reference the Vertiv GL-series accessory line.
Frequently Asked Questions
Q: What NEMA rating does the GL48N12-24-B-AC22 carry?
A: The GL48N12-24-B-AC22 is rated NEMA 12, providing protection against dust, lint, and dripping or splashing non-corrosive liquids. It is not rated for outdoor use or wash-down environments.
Q: What rack unit configurations are available for this enclosure?
A: The enclosure is available in 12U (24" height), 19U (36" height), and 26U (48" height) configurations. The GL48N12-24-B-AC22 designates the 26U / 48" version.
Q: What depth options are offered?
A: The GL48N12-24-B-AC22 is available in 24" and 30" interior depths. Select based on the chassis depth of your deepest piece of equipment, accounting for cable bend radius at the rear.
Q: What cooling options are supported?
A: The enclosure supports a standard fan/filter configuration and accepts optional air conditioning units at 1000 BTU, 1300 BTU, or 2200 BTU. You can deploy with passive or fan cooling initially and upgrade to active AC without replacing the enclosure.
Q: Is this enclosure suitable for outdoor installation?
A: No. NEMA 12 is an indoor industrial rating. For outdoor deployments, a NEMA 3R or NEMA 4X-rated enclosure is required.
The spec I look at first on any wall-mount enclosure is the NEMA rating — and on the GL48N12-24-B-AC22, NEMA 12 tells you exactly where this unit belongs: inside, in environments with industrial-grade particulate or drip exposure, not in a conditioned IT closet and not outdoors. That distinction drives the whole deployment decision.
Technical Highlights:
- NEMA 12 Sealed Construction: Protects against dust, lint, and non-pressurized liquid ingress — the right call for mechanical rooms, light manufacturing IDFs, and security head-end rooms adjacent to HVAC equipment.
- AC Cooling Up to 2200 BTU: For a 26U enclosure loaded with PoE switches and active equipment, 2200 BTU of field-installable AC capacity keeps thermals in check without building a dedicated cooling chase — and the option to start with just a fan/filter means you're not over-buying on day one.
- 26U at 24" or 30" Depth: The depth choice is the decision that trips people up. The 24" option handles most 1U/2U networking gear cleanly; step to 30" only if you're seating a full-depth UPS or servers. Getting this wrong means the door won't close.
Deployment Considerations:
- Wall-mount loading: a fully populated 26U enclosure is a significant point load. Always verify wall structure — blocking or a structural backing plate is required in metal-stud or drywall construction before mounting.
- NEMA 12 does not mean waterproof or wash-down rated. If the installation site sees hose-down cleaning or condensation from large temperature swings, step up to NEMA 4 or 4X instead.
This enclosure is the right fit for a light-industrial IDF or security-system head-end room where NEMA 12 protection is required and a full floor-standing cabinet is impractical — particularly in retrofit installations with limited floor space.
