366 plus I-89 Low-E Glass

Includes 4th Surface low emissivity coating

366 plus Low-E glass provides the same benefits as our regular Sun Advantage™ 366 with the additional performance benefits of a 4th Surface Low-E coating.

The 4th Surface Coating is provided by i89. LoĒ-i89 on the 4th surface of your windows allows you to get near triple-pane performance in a double-pane unit, and meet the toughest energy guidelines as well.

Sun Advantage™ 366 plus is ideal for applications that require U-values that are lower than those that are possible with our standard Sun Advantage™ 366 or our 270 plus. This may include projects with specific performance requirements or extra cold climates.

• Lowest U-value of all our Low-E IG options
• Meet Ultra-Low U-value Specifications
• Increases the insulating properties of the IG unit
• Increases room comfort