4 1/2" High Performance Thermal, Horizontal Sliding / Fixed Arch. Grade Window - XTherm Series SX45,
Model Number: 4 1/2" High Performance Thermal, Horizontal Sliding / Fixed Arch. Grade Window - XTherm Series SX45, FX45
The SX45 has many options to fit all types of building applications. Designed to meet the increasing demand for energy efficient products needed in schools, government buildings and green construction, the EFCO SX45 horizontal sliding window sets a new thermal standard without sacrificing the structural requirements of a heavy commercial or architectural grade product.The outstanding U-factor provides demonstrable energy savings when used in conjunction with building envelope performance software and provides a substantial improvement in the interior frame temperature which improves condensation resistance.
•Fixed mate, series FX45
U-factor = .31