1) 5 3/4 po. or 6 9/16 po. Frame (allowing to position the thermos in the warm part of the wall as recommended by the New Building Code).
2) Welded rigid PVC (interior) and extruded aluminum (exterior) for frame and sash.
3) Continuous weatherstrip for optimal insulation.
4) Sash tilts in for easy cleaning.
5) Efficient cam locking system and fully integrated one-piece interlock.
6) Central security interlock.
7) 7/16 po.(11mm) full or half screen.
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