Windows & Doors
Great Lakes Window ecoSmart
Great Lakes Window introduces ecoSmart windows and patio doors, a line developed to provide remodeling customers with a superior choice that comes standard with advanced insulating technologies. The new vinyl series is the most energy efficient option that Great Lakes Window offers, with center of glass U-factors as low as 0.111 (R 9.1) in all product styles, and total unit U-factors as low as 0.14 (R 7.1) in fixed units or 0.16 (R 6.3) in double hung units.