Air Infiltration:
The amount of air that leaks though the window.
Argon:
A gas that is six times more dense than air. It is installed between two panes of glass to
reduce heat transfer though the window; it also helps with soundproofing.
Bay:
A bench-type window that has three sides, usually a picture window in the center and
casements or double hung windows on the sides.
Bow:
A bench-type window combination with more than three sides.
Block and Tackle Balance System:
Used in single- and double-hung windows to counter balance the weight of the window sash when opening and closing.
Casement:
Opens left or right like a door, operates with a crank.
Double Hung (DH):
Opens up and down.
GBG:
Grids Between Glass. The grids (muntins) are installed between two pieces of thermal glass, to allow for easy cleaning.
Grids:
Bars (muntins) in the window pane that breaks up the glass into sections, older windows have actual separate panes of
glass that are held together by the grid pattern.
Hopper:
Casement turned on its side.
ISO 9000:
Certification that ensures strict quality control, for an outstanding window every time.
Krypton:
Gas that is installed between the two panes of glass to reduce heat transfer though the window; it also helps
with soundproofing.
Low-e:
(low emittance) A coating on the glass of the window to minimize heat transfer: helps to save the environment and energy
costs. Low-e also helps to keep your furnishings, curtains, and carpet from fading due to prolonged exposure to the suns
ultraviolet rays.
New Construction Window:
A window that is installed by completely removing the original window.
NFRC (National Fenestration Rating Council):
non-profit organization that administers the only uniform, independent rating and
labeling system for the energy performance of windows, doors, skylights, and
attachment products.
Picture:
A solid, none operating window.
Replacement Window:
A window that is installed in an existing window frame.
R-Value:
A measure of the resistance of heat gained or lost. The higher the R-value number, the better.
Sash:
The part of the window that holds the glass in place. On a double-hung window, it is the
part that sides up and down.
SDL:
Simulated Divided Light. A grid system that gives the actual look of older windows.
Slider:
A double hung turned on its side.
United Inches (U.I.):
The width of a window added to the height of a window. For example, a window that is 24" wide and 42" high is 66 U.I.
U-Value:
A measure of a structural materials ability to conduct heat. The lower the U-Value number, the better.
Wood Clad Windows:
Windows with wood on the inside and aluminum on the outside. This style offers the beauty of wood on the inside
(and allows you to paint your window to match your decor) and the protection of aluminum on the outside.
