An item which has a lower air leakage rating is tighter than 1 using a high air leakage score. Be aware that air leakage also will depend on correct installation of a window, that is assumed in all scores. There are numerous different types of thermal insulators, each with its https://trentonxfknq.dbblog.net/58383077/bespoke-secondary-glazing-in-bloomsbury-for-dummies