Notice: These values are for the center of glass only. They should only be used to compare the effect of various glazing types, not to match whole window products and solutions. Frame preference can significantly impact overall performance. These values represent double glazing that has a 1/two″ air gap. Windows https://eyebrow-maintenance-tools92478.ambien-blog.com/43370168/5-tips-about-secondary-glazing-you-can-use-today