Anyway, there are no rules to limit your decision concerning numbers. The U Factor ratings for windows run from .20 through 1.20 and also the lower the U Factor the improve. Now that I have given you this over view here's the real deal. http://[email protected]/baohiemthatnghiep/Redirect.aspx?sms=90bb20bb20tbb20thc3B4ng&link=https://Selfstorageinsiders.com/question/6-hints-for-using-humor-in-your-marketing-3/