White uPVC window with Georgian bars in a bright living room interior

uPVC Windows Energy Ratings Explained

uPVC windows energy ratings help you compare products quickly and choose frames and glass that keep your home warm for less. In this guide, we break down the rating labels, what U-values actually mean, and the simple targets to ask for when you order new uPVC windows. What are uPVC windows energy ratings? Manufacturers and […]

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