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The AisleLok Transom Window quickly and easily expands the effective height of AisleLok Sliding Doors.

AisleLok Transom Windows

Transom Windows Fit AisleLok Sliding Doors

The AisleLok Transom window has been designed to quickly and easily increase the effective height of the AisleLok Sliding Doors. Like the rest of the AisleLok Modular Containment system, that also includes rack top baffles, the Transom Window has a tool-less installation, removal and re-installation design. The AisleLok Transom Window has been designed to be installed to the top of the AisleLok Sliding Doors’ frame and enables the doors to be used on racks with a height of up to 93inches (236cm) or 50U.

Like other components of the AisleLok Modular Containment system the Transom Window can be used in either hot or cold aisle containment configurations and are beneficial to be used in both raised floor or slab Data Centre environments. Transom Windows are available in various widths and are either Black or White.


AisleLok Transom Windows feature a clear polycarbonate panel that is secured within an extruded aluminium frame structure.

Fire Rating

Upsite Technologies®, a division of Aquila, have designed the AisleLok Transom Windows to accept panels with a variety of flammability ratings, including UL 94 HB (standard), UL 94 V-0 (custom), or FM 4910 (custom).

AisleLok® Modular Containment was designed to be compliant with data centre fire codes, however approval may vary greatly at the country and local level. As with the installation of any containment method, the final approval for compliance resides with the local authority having jurisdiction (AHJ).

Features & Benefits


  • Standardised off-the-shelf design, accommodates common rack heights.
  • No tools required for installation; attaches directly to AisleLok® Sliding Doors.
  • Quick and easy mounting allows for minimal disruption to the data centre.
  • Rugged, high quality design enhances professional aesthetics of the computer room.
  • See-through window provides maximum visibility in and out of the aisle.
  • Standard in black or white, custom colours are available.
  • Flame rated materials.


  • Supports reduced energy costs by providing the opportunity to increase set point temperatures and/or turn off cooling units or reduce fan speeds.
  • Supports increased reliability and availability of IT equipment by reducing server intake temperatures.
  • Allows for higher rack densities.
  • Prevents hot air recirculation.
  • Flexible design allows the containment system to adapt as the computer room evolves.
  • Tool-less installation with no drilling required.
  • Lower initial cost than traditional containment.
  • Modular design and out-of-the-box installation does not require 3rd party design, engineering, or construction, which minimizes computer room disruption.



Part NumberDescriptionDimensions
46-20155-4504’ Sliding Doors Transom Window, Black61.25” x 11.75” x 1.75”
(1556mm x 299mm x 44mm)
46-20255-4504’ Sliding Doors Transom Window, White61.25” x 11.75” x 1.75”
(1556mm x 299mm x 44mm)
46-20155-6506’ Sliding Doors Transom Window, Black85.25” x 11.75” x 1.75”
(2165mm x 299mm x 44mm)
46-20255-6506’ Sliding Doors Transom Window, White85.25” x 11.75” x 1.75”
(2165mm x 299mm x 44mm)
46-20155-7507’ Sliding Doors Transom Window, Black93.25” x 11.75” x 1.75”
(2369mm x 299mm x 44mm)
46-20255-7507’ Sliding Doors Transom Window, White93.25” x 11.75” x 1.75”
(2369mm x 299mm x 44mm)
46-20155-8508’ Sliding Doors Transom Window, Black106.25” x 11.75” x 1.75”
(2699mm x 299mm x 44mm)
46-20255-8508’ Sliding Doors Transom Window, White106.25” x 11.75” x 1.75”
(2699mm x 299mm x 44mm)

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