Our windows are Made in Britain using a++ to B energy effectiveness scores across the range of double glazing and triple glazing. Our major-undertaking A++ rated triple glazed windows are intended with energy-conserving glazing engineering to scale back warmth loss even even further. The Photo voltaic Heat Gain Coefficient (SHGC) https://www.apptape.co.uk/blog/dec-advantages-of-window-tinting-films/