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Climate varies widely across the US, and windows have to handle very different conditions from one region to another.

That small NFRC label can tell you a lot about how a window will perform in a real home. U-Factor shows how well it resists heat transfer, SHGC indicates how much solar heat comes through, and Air Leakage measures how much air can pass around the window.

Window color and finish can reinforce a home's architectural character or work against it.

A window can have an impressive U-Factor and still be the wrong choice for a Passive House project.

SAN ANTONIO, TX - September 8, 2026 - We at OKNOPLAST, a leading manufacturer of premium window systems, are excited to announce our participation in the upcoming Build Show LIVE 2026, held at the Henry B. González Convention Center in San Antonio, Texas, from September 10-12, 2026.

ENERGY STAR window ratings make it easier to compare residential windows using standardized NFRC performance data.

At first glance, tilt-and-turn windows, double-hung windows, casement windows, and sliding windows all do the same job-they let in natural light, fresh air, and views.

Triple-pane windows do more than lower energy bills-they help create a quieter, more comfortable home by reducing outdoor noise.