Notice: These values are for the middle of glass only. They should only be applied to compare the effect of various glazing varieties, not to match overall window solutions. Body option can significantly affect effectiveness. These values represent double glazing using a one/two″ air hole. It had been accessible in https://icicle-inspired-cocktails37260.angelinsblog.com/33846877/an-unbiased-view-of-secondary-glazing