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  • Exterior - section cut - GLASSvent® UT Window installed in 1600UT Curtain Wall
  • Interior - section cut - GLASSvent® UT Window installed in 1600UT Curtain Wall
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GLASSvent® UT (Ultra-Thermal) Windows

  • 3-1/8" (79.4) or 3-7/8 " (98.4) depth (CW) | 4-3/8" (111.1 mm) or 5-1/8" (130.2 mm) depth (AW)
  • Commercial Grade Window (CW) and Architectural Grade Window (AW)

  • Ultra-thermal performance

  • Casement or projecting configuration
  • Blast mitigation (AW only), hurricane resistance (AW only)

Product Features

Best-in-Class Thermal Performance in a Visually Concealed Vent

 Never before has something so seamless offered so much thermal performance. GLASSvent® UT (Ultra-Thermal) Windows are visually frameless concealed vents designed to provide a ventilation option for curtain wall with high thermal performance. The extraordinary thermal performance of GLASSvent® UT Windows exceeds the thermal standards of many high-performing framing systems. Engineered for seamless integration with the 1600UT System™1 Curtain Wall, GLASSvent® UT Windows can also be inserted into other Kawneer captured curtain walls and front set framing systems.

In addition to meeting code requirements, GLASSvent® UT Windows are the ideal solution for architects and designers who want to provide fresh-air ventilation without sacrificing thermal performance in curtain wall or storefront applications. As with all Kawneer windows, this ultra thermal vent is made from material that will never rot, warp or buckle due to moisture and weather exposure.


GLASSvent® UT (Ultra-Thermal) Windows have undergone testing to hurricane and blast mitigation standards, offering additional protection beyond traditional air, water and structural performance, and help meet the needs of building security and occupant safety. 

Architectural Grade

  • CW-PG70-AP / AW-PG90-AP - Projecting
  • CW-PG70-C / AW-PG90-C - Casement

Standard Features

  • 3-1/8" (79.4) or 3-7/8 " (98.4) depth (CW) | 4-3/8" (111.1 mm) or 5-1/8" (130.2 mm) depth (AW)
  • Commercial Grade Window (CW) and Architectural Grade Window (AW)
  • Tested to US and Canadian Standards
  • 45° Mitered Vent and Frame Corners
  • Staked Corner Joinery
  • Architectural Anodized Finishes and Applied Coatings
  • Large Missile and Small Missile Hurricane Impact Tested - AW (Deep) only
  • Blast Mitigation Tested - AW (Deep) only
  • Trim Cap available in #29 Black anodized finish only

Purpose built with accessibility in mind

Kawneer has a functional and aesthetically pleasing ADA compliant operating handle option for GLASSvent® UT (Ultra-Thermal) Project Out Windows. 

  1.  Available on AW Version (4 3/8”/111.1 mm depth), project-out awning GLASSvent® UT Windows up to standard AAMA gateway test size.
  2.  The handle has been laboratory-tested and proven.
  3.  The ergonomic and stylish Omni Drive™ operator from Caldwell features an attractive design with its easy-to-use horizontal handle movement and comes in two sizes:  a 12” handle size for ADA compliance and an 8” handle size for other non-ADA applications.

This new option provides a solution to meet the Americans with Disabilities Act (ADA) recommendation that operable windows require no more than a five-pound operating force* while also providing a coordinating handle for non-ADA applications.


*Laws and building and safety codes governing the design and use of glazed window products vary widely. Seller does not control the selection of product configurations, operating hardware or glazing materials, and assumes no responsibility therefore.


Omni Drive™ is a trademark of Caldwell Mfg. Co..

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