A close-up, high-resolution photo of a white NFRC (National Fenestration Rating Council) sticker attached to the glass of a brand-new window. The numbers for U-Factor and SHGC are clearly visible.
A close-up, high-resolution photo of a white NFRC (National Fenestration Rating Council) sticker attached to the glass of a brand-new window. The numbers for U-Factor and SHGC are clearly visible.