Nailing fin:
An integral extension of a window or patio door frame which generally laps over
the conventional stud construction and through which nails are driven to secure
the frame in place.
NFRC:
National Fenestration Rating Council.
Obscure glass:
Any textured glass (frosted, etched, fluted, ground, etc.) used for privacy, light
diffusion, or decorative effects.
Operable window:
Window that can be opened for ventilation.
Operator:
Crank-operated device for opening and closing casement or jalousie windows.
Pane:
One of the compartments of a door or window consisting of a single sheet of glass
in a frame; also, a sheet of glass.
Panel:
A major component of a sliding glass door, consisting of a light of glass in a frame
installed within the main (or outer) frame of the door. A panel may be sliding or
fixed.
Panning:
In replacement windows work, the outside aluminum trim that can extend around the
perimeter of the window opening; used to cover up the old window material. Panning
can be installed in the opening before the window, or can be attached directly to
the window before installation.
Particle dispersed glazing:
Glazing in which the orientation of small particles between two sheets of glass
is controlled electrically, this-changing its optical properties.
Parting stop:
A narrow strip, either integral or applied, that holds a sash or panel in position
in a frame.
Peak load:
The maximum thermal load to be provided by a heating or cooling system in a house.
Photochromic:
capable of changing color on exposure to radiant energy. Glazing with the optical
properties that change in response to the amount of incident light.
Picture window:
A large, fixed window framed so that it is usually, but not always, longer horizontally
than vertically to provide a panoramic view.
Pivot window:
A window with a sash that swings open or shut by revolving on pivots at either side
of the sash or at top and bottom.
Plastic film:
A thin plastic substrate, sometimes used as the inner layers in a triple- or quadruple-glazed
window.
Plastics:
Artificial substances made of organic polymers that can be extruded or molded into
various shapes including window frames and sashes.
Plate glass:
A rolled, ground, and polished product with true flat parallel plane and surfaces
affording excellent vision. It has been replaced by float glass.
Polyvinylchloride (PVC):
An extruded or molded plastic material used for window framing and as a thermal
barrier for aluminum windows.
Projected window:
A window fitted with one or more sashes opening on pivoted arms or hinges. Refers
to casements, awnings, and hoppers.