Glass-heavy facades in India's extreme climate drive up cooling loads, energy bills, and carbon footprints. Sun control films for buildings offer a practical fix, applied directly to existing glass, no structural changes required. This guide covers the technical parameters that determine real performance (VLT, TSER, IR, UV), how Saint-Gobain's EPD-certified films support LEED and ESG targets, and what the ROI looks like for commercial buildings in Delhi NCR.