Observe: These values are for the center of glass only. They ought to only be applied to compare the impact of various glazing sorts, not to compare full window products. Body decision can greatly have an affect on general performance. These values symbolize double glazing using a 1/two″ air gap. https://milowgkoq.jiliblog.com/93259636/5-tips-about-secondary-glazing-you-can-use-today