2350 Series | 2450 Series | 3550 Series

The Heartland Collection™ (STI) is proud to offer vinyl windows for new construction that meet the needs of any customer. Whether it’s a cost conscious consumer or a high end homeowner, The Heartland Collection™ (STI) systems satisfy the most discerning purchaser. Built for durability, designed for performance, and tested for quality, The Heartland Collection™ (STI) delivers consistency, features, and style. That’s why The Heartland Collection™ (STI) is the window preferred by building professionals.

Random, unannounced tests of the vinyl components used in every The Heartland Collection™ (STI) window are conducted by an independent trade organization of building product manufacturers. The American Architectural Manufacturers Association (AAMA) conducts a vinyl lineal certification program and the results of these tests clearly show that the vinyl components used exceed all industry standards for impact resistance, dimensional stability, and color fastness.

The Heartland Collection™ (STI) high performance window and door systems are monitored for quality and consistency in every step of fabrication. Computer-controlled manufacturing and a revolutionary quality management system are integral to this quality assurance program but perhaps the most important factor is the care taken by our employees. Our skilled craftsmen build every window system as if it were their own. Combine that passion for excellence with state-of-the-art technology and it’s easy to see why the quality of The Heartland Collection™ (STI) windows is unmatched in the industry. Four point fusion welders ensure that every corner is square and sealed against air and water infiltration. Computer-controlled glass cutting imparts exact tolerances to every piece of glass.

Tested throughout the manufacturing process, every window must meet stringent standards for quality. All The Heartland Collection™ (STI) windows come with a lifetime transferable non-prorated warranty. See warranty for details.