Vertiv 8402E-MC24SL-B ES Door Seal Round Mesh 84 x 24 in Door Seal

Overview

The Vertiv 8402E-MC24SL-B is a round mesh door seal designed for the Vertiv ES cabinet line, sized to fit 84-inch tall, 24-inch wide front doors. Door seals in this class exist to close off the gap between adjacent cabinet enclosures or between a cabinet door and the surrounding structure — a gap that, left unaddressed, allows hot exhaust air to recirculate back into the cold aisle, raising inlet temperatures and forcing cooling systems to work harder than necessary. If your data center or telecom room uses hot aisle/cold aisle containment, sealing every gap in the cabinet row is as important as the CRAC unit itself.

The 8402E-MC24SL-B ships in a black finish and is engineered specifically for the Vertiv ES cabinet family. Confirming the correct cabinet height and door width before ordering is essential — this seal targets the 84-inch height dimension and the 24-inch front door width within the ES line. The mesh construction allows for airflow visibility and cable routing flexibility while maintaining the seal integrity needed for containment effectiveness. For integrators managing network cabinets and racks, selecting the correctly sized seal up front avoids rework once the enclosure row is populated and live.

Key Features

• 84-Inch Cabinet Height Fit: Sized for the 84-inch ES cabinet height — one of the most common rack heights in enterprise deployments. Using a seal dimensioned for a different height (79-inch or 91-inch) leaves exposed gaps that undermine containment, so confirming your cabinet height before ordering is non-negotiable.
• 24-Inch Front Door Width: Matches the 24-inch front door of the Vertiv ES line. The ES cabinet is also available in 30/32-inch front and rear door widths — this part number is specifically for the 24-inch front door variant. Ordering the wrong width results in a seal that either doesn't cover the opening or can't be installed without modification.
• Round Mesh Construction: The mesh format permits limited airflow through the seal material itself, which is useful when the goal is to reduce bypass air recirculation without creating a fully sealed pressure barrier. It also allows visual inspection of cable runs and minor cable pass-through without compromising the installation.
• Black Finish: Matches standard black ES cabinet enclosures for a consistent rack room appearance. For environments with mixed enclosure colors or clear-panel configurations, Vertiv also offers this seal family in alternate color options (clear/other) — verify the color suffix in the part number when ordering.
• ES Cabinet Family Compatibility: Engineered as a direct-fit accessory for the Vertiv ES cabinet line, meaning no cutting, trimming, or field modification should be required for a properly sized cabinet. Third-party or non-ES Vertiv cabinets may require dimensional verification before purchase.
• Airflow Management Role: In hot aisle/cold aisle containment rows, unsealed gaps between cabinet doors and adjacent structures are a primary source of hot air recirculation. A properly installed door seal on every cabinet in the row can measurably reduce server inlet temperatures — which translates directly to reduced cooling load and better PUE for the facility.

Integration & Compatibility

The 8402E-MC24SL-B (often searched as 8402E MC24SL B) is a direct-fit accessory for the Vertiv ES enclosure series. The ES line supports cabinet heights of 79, 84, and 91 inches, and front/rear door widths of 24 inches and 30/32 inches — this seal addresses the 84-inch height, 24-inch front door configuration specifically. If your deployment includes ES cabinets of different heights or wider door configurations, Vertiv offers companion part numbers within the same ES door seal family to cover those dimensions. For multi-cabinet rows, order one seal per cabinet door gap to achieve consistent containment across the entire row.

For facilities using structured power and cooling management strategies, pairing these door seals with blanking panels for open rack units completes a full passive airflow management approach without requiring active containment infrastructure. Facilities deploying containment aisles should audit every cabinet in the row — a single unsealed gap can reduce the effectiveness of an otherwise well-designed containment system. Consult your cable management plan before finalizing installation, as cable routing through or around the seal area should be accounted for during rack build-out rather than after.

Frequently Asked Questions

Q: Which Vertiv cabinet heights is the 8402E-MC24SL-B compatible with?

A: The 8402E-MC24SL-B is sized for 84-inch tall Vertiv ES cabinets. The ES line also comes in 79-inch and 91-inch heights — those configurations require different part numbers. Confirm your cabinet height before ordering.

Q: Does this door seal fit the 30/32-inch wide ES cabinet doors?

A: No. This part number covers the 24-inch front door width. The Vertiv ES line also ships with 30/32-inch front and rear door options, which use separate seal part numbers. Check your ES cabinet's door width specification before purchasing.

Q: What finish does the 8402E-MC24SL-B come in?

A: Black. The ES door seal family is also available in clear and other color options — confirm the color suffix in the part number matches your enclosure finish if appearance consistency matters for your installation.

Q: Can this seal be used with non-Vertiv cabinets?

A: The 8402E-MC24SL-B is engineered as a direct-fit accessory for the Vertiv ES cabinet family. Use with third-party enclosures would require independent dimensional verification and may involve modification — it is not a tested or supported configuration.

Q: Why does gap sealing matter in a cabinet row?

A: Unsealed gaps between cabinet doors and adjacent structures allow hot exhaust air to recirculate into the cold aisle, raising server inlet temperatures and increasing cooling system load. In containment deployments, every unsealed gap reduces the effectiveness of the containment strategy. Properly sealing each cabinet in the row is a standard step in achieving reliable PUE targets.