• AAMA certified laboratory testing proves these windows can stand up to the harshest environments.
• Wind resistance up to 155 MPH
• U values from 0.16 to 0.19 a true “R5” window.
• Water resistance of 9 PSF or more.
• Choose from a range of LoE glass combinations that increase or reduce solar heat gain.
• Mercer triple pane windows provide superior levels of visible light and energy efficiency.
•Available with internal grids.

• Best choice for high altitudes.
• Designed for low or multi-story.
• Double strength 1 ½" or 1³/8" thick, dual seal insulated glass
• Thicker and deeper frame construction, substantial aluminum reinforcing, with hardware, rollers, and balances designed specifically for triple pane glazing.

R5 Triple Pane 830 Windows
R5 Triple Pane 3.25 Windows

Download R5 Performance spec sheet