Triple-pane glass and a weather-sealed resilient frame combine for energy efficiency in a new series of windows from Apex Energy Solutions. Insignia e2’s frame is made from uPVC resins, which are recyclable. Krypton-gas-filled chambers between panes help windows provide insulation for an R-value of 10. The series includes double-hung, slider, casement, and picture windows. Privacy glass is available. apexenergygroup.com