The Window World 6000 Series is part of the Replacement Windows test program at Consumer Reports. In our lab tests, Double-Hung Windows models like the 6000 Series are rated on multiple criteria, such as those listed below.

Wind resistance 0 degrees: Wind resistance measures each window's ability to prevent drafts with 25 and 50 mph winds and an outdoor temperatures of 0ºF.

Wind resistance 70 degrees: Wind resistance measures each window"s ability to keep out drafts with 25 and 50 mph winds an an outdoor temperatures of 70º F.

Rain resistance: Rain resistance measures their ability to keep water out from heavy, wind-driven rain.