How should different window test results impact my decisions?
Be careful when looking at extremely specific results since many of them do not really indicate how well the window will work for you. Some apply to just certain parts of the window, like the glass and its R-value, and do not give an overall picture. Tested in nationally-certified labs and our own modern test facility, Alside windows are engineered to provide the optimum in energy savings and are monitored by the National Fenestration Rating Council.
