Panduit CTGN3X5 Cool Boot 3"x5" Cabinet Grommet

Panduit CTGN3X5 Cool Boot® 3" x 5" Cabinet Sealing Grommet

The Panduit CTGN3X5 Cool Boot® grommet addresses a critical thermal management weakness in datacenter rack deployments: hot bypass air infiltrating cold aisles through cable pass-through openings at the top of cabinets. When cable bundles enter racks without proper sealing, recirculated hot exhaust air from the rear hot aisle flows around the cables into the cold aisle, degrading cooling efficiency by 15-30% and forcing CRAC units to overcool to compensate. This 3" x 5" form-fitted cable pass-through combines airtight elastomeric fabric with integrated Ultra-Cinch™ cable ties to create a flexible, resealable barrier around cable bundles entering Net-Access™ and FlexFusion cabinet top openings. The grommet installs into standard 3" x 5" rectangular knockouts common in Panduit 700mm, 800mm, and 1000mm wide cabinets, providing immediate containment improvement without requiring cabinet modifications or cable re-termination.

Key Features

• Airtight elastomeric fabric construction seals irregular cable bundle profiles while maintaining flexibility for adds/moves/changes
• Integrated Ultra-Cinch™ cable tie system secures fabric around cable bundles without separate fasteners or adhesives
• Form-fitted 3" x 5" (136.1mm x 217.7mm) profile matches standard rectangular knockouts in Panduit Net-Access and FlexFusion cabinets
• Compatible with 600mm, 700mm, and 800mm width FlexFusion cabinets and 700mm/800mm Net-Access cabinets
• Black UV-resistant fabric maintains seal integrity in 24/7 datacenter environments without degradation
• RoHS compliant construction meets EU and California e-waste disposal requirements
• Resealable design accommodates cable additions or removals without replacing the grommet
• 8.57" overall height provides extended fabric skirt for securing around large or irregular cable bundles

Hot aisle/cold aisle containment strategies depend on eliminating every bypass air path between the segregated zones. The top cable entrance represents one of the largest uncontrolled openings in rack containment systems—cable bundles from overhead ladder rack or cable tray create irregular gaps that rigid brush strips or solid panels cannot effectively seal. The Cool Boot grommet solves this with a collapsible fabric boot that conforms to whatever cable bundle profile passes through it, then cinches tight with the integrated Ultra-Cinch tie system. The airtight fabric prevents differential pressure between hot and cold aisles from forcing warm exhaust air through the gap. In deployments with 10-15°F cold aisle / hot aisle deltas, unsealed top cable openings can account for 20-25% of total bypass air leakage. Sealing these openings allows CRAC supply temperatures to rise 3-5°F while maintaining the same rack inlet temperatures, translating to 8-12% reduction in cooling energy consumption per sealed rack. The fabric's flexibility also maintains the seal during cable movement from slack management or thermal expansion, unlike rigid grommets that crack or separate under stress. For facilities tracking PUE (Power Usage Effectiveness), systematic deployment of Cool Boot grommets across all rack top openings typically contributes 0.03-0.05 PUE improvement by reducing cooling system load.

Installation targets the top cable entry point on Net-Access S-Type, N-Type, and E-Type cabinets as well as FlexFusion modular cabinets in 600mm, 700mm, and 800mm widths. The 3" x 5" form factor matches the pre-punched rectangular knockouts in these cabinet lines' top panels—no field cutting or custom fabrication required. For retrofit installations on occupied racks, the grommet installs around existing cable bundles without service interruption: remove the existing knockout cover or brush strip, feed the Cool Boot fabric over the cable bundle from above, insert the grommet frame into the knockout opening, then tighten the Ultra-Cinch tie around the cable bundle perimeter. The fabric accommodates bundles ranging from a few individual cables up to dense 200+ conductor bundles without tearing or losing seal integrity. The black fabric finish matches standard Panduit cabinet aesthetics and hides dust accumulation common in raised-floor datacenters. Each unit ships individually packaged with carton quantities of 10 for multi-rack deployments. For large datacenter builds or hot aisle containment retrofits spanning 50+ racks, order in carton multiples to ensure consistent stock for phased rollouts.

This grommet is specifically engineered for Panduit's cabinet ecosystem—the 3" x 5" knockout dimension, mounting frame geometry, and fabric skirt length are optimized for Net-Access and FlexFusion top panel thickness and cable routing geometry. Facilities standardized on Panduit cabinets gain plug-and-play compatibility without the fit/finish issues common when mixing third-party containment accessories. The RoHS compliance also satisfies procurement requirements for EU-based datacenters or multinational corporations with global environmental standards. For new cabinet deployments, spec the CTGN3X5 alongside cable management vertical managers and horizontal finger ducts to complete a fully sealed cable routing path from rack top to equipment rear. For existing installs with measurable hot air recirculation (identified by rack inlet temps exceeding cold aisle ambient by 5°F+), the Cool Boot grommet provides one of the highest ROI containment improvements—typically $40-60 annual energy savings per rack in facilities with $0.12/kWh electricity costs, delivering payback in under 2 years even at single-unit pricing.