Skip to main content

Sub-Zero High Altitude Doors


  • What elevation requires the use of a high altitude glass door for Sub-Zero products?
  • How to order a high altitude glass door for Sub-Zero glass door units?
  • Can the high altitude glass (HAG) door be installed in levels below 5000'?
  • What does A stand for in Sub-Zero model numbers?


A high altitude glass door is available for installations above 5,000' in elevation.
  • In the model number, replace (G) for glass with (A) for altitude to get the correct high altitude product.
    • For models without a "G" for glass, add an "A" to the model. Example: UW-24A/S/TH-RH
    • High altitude glass doors are only available on stainless steel models for Classic (CL) Series units.
  • The glass on high altitude models is specifically designed to be installed 5,000' above sea level.
    • The door can bow if a unit without high altitude glass is installed at high altitude.
    • There is no maximum elevation for high altitude doors.
  • Installing a high altitude door at lower elevations may compromise the integrity of the unit.
    • It is not possible to replace a high altitude door with a normal glass door, or vice versa.
  • Dual installations are possible with two units that have high altitude doors.
    • The dual installation trim will not line up if a high altitude door is placed next to a normal glass door unit.
    • Refer to Undercounter Dual Installation Kit for more information.
Contact a Local Dealer for further sales information.


Need further assistance? Contact Customer Care at 800.222.7820 or provide your information below and request a Customer Care representative contact you.

Ask Your Question

We're standing by with answers

Whether you're shopping for appliances or have questions about those you already own, we've got the resources you need. Talk directly to a customer care expert at the Sub-Zero, Wolf, and Cove service center, or connect with an appliance consultant at an official showroom near you. Get quick answers online, or reach a certified service provider or installer. And much more.


Call us at (800) 222-7820