Milgard. SunCoatMAX low-E insulating glass is now an upgrade option on the manufacturer’s full line of windows and patio doors. The double-pane, triple-coating technology provides a center-of-glass SHGC of 0.27 and a U-factor of 0.24. Montecito and Tuscany vinyl casement windows with SunCoatMAX, argon gas, and no grids, have a whole-unit U-factor of 0.29 and SHGC of 0.19. SunCoatMAX is available on the manufacturer’s windows in the West, which are offered with aluminum, vinyl, and fiberglass frames. Aluminum and vinyl frames contain recycled material; vinyl frames contain between 5% and 100% recycled material. Energy Star qualification depends on the zone and frame material of the window. 800.645.4273.