500 Series

1. Double Hung
  A window consisting of two sashes operating in a master frame where both the upper and lower halves slide vertically past each other and both tilt in for cleaning.
1. Picture Window
  A fixed window which does not open for ventilation.

1. Sliding Window
  A window consisting of two or more sashes which operate by sliding horizontally past each other.
1. Hopper Window
  A window where the sash is hinged at the bottom and pulls inward for opening.