All of our patio doors come standard with LoĒ-180 glass with Argon from Cardinal. It is a glass coating with a thin, clear layer of silver between layers of anti-reflective metal oxide coatings. A protective coating is applied to assure durability and long life, which is invisible to the naked eye, like looking through clear glass. It also provides excellent insulating capability, and is the ideal choice for comfort, reliability, and energy savings.
Cardinal LoE 180 provides the following benefits:
• Blocks heat loss to the outside and reflects heat back into the room
• Blocks 71% of the sun’s harmful UV rays
• Allows the relative humidity of the indoor air to be controlled and maintained properly
• Save money on heating and cooling with Energy Star compliancy
• 20 Year Warranty