Best U-Factor and SHGC Ratings for Windows in Northern Virginia
Once the sales language fades, two ratings do most of the heavy lifting on window performance, U-factor and SHGC. Put simply, U-factor helps with winter comfort and SHGC helps control summer heat. An experienced window replacement company can confirm the right rating mix with a quick inspection. Why These Two Numbers Matter More Than Marketing Copy A lower U-factor means the window slows heat loss better, which matters during cold snaps and windy nights. A lo