YKK AP America offers the most energy-efficient aluminum window in its class: the YOW 350 XT. Designed to ensure high performance and operation, the architectural-grade window offers thermal-resistant properties and barriers to minimize energy loss, making it up to 30-percent more efficient than standard, thermally broken windows. When using industry standard low-E glazing, the YOW 350 XT achieves an aggressive U-value of 0.34 in a fixed window configuration. With the same glass type, casement, and projected configurations, the YOW 350 XT achieves a U-value of 0.35. By adding high-performance glazing, this new window achieves historically low U-values.
