uPVC windows by Kommerling A wide variety of bespoke uPVC window designs are available from our Kommerling uPVC window line. In order to specify uPVC window units that achieve an A++ efficiency rating or higher, Dhanush Building Systems offers a variety of uPVC window design options, including twin sash, sliding, side-hung, top-hung, tilt-and-turn, french, and glass-to-glass windows. Additionally, you can benefit from our flawless installation and delivery right to your door. In India, uPVC windows offer exceptional value and are frequently more affordable than aluminum windows. Your home will profit greatly from modern uPVC windows over aluminum or wood in terms of design, security, and energy efficiency.