The amount of outside air that leaks into a home through and around a window or door, usually measured under standardized test conditions.
The amount of outside air that leaks into a home through and around a window or door, usually measured under standardized test conditions.
A performance value that indicates how much air passes through a window or door assembly; lower numbers mean tighter, more efficient units.
A window with frames made primarily from aluminum, known for strength and slim profiles but typically less efficient without thermal breaks.
Standard untreated float glass that has been slowly cooled to relieve internal stresses; more likely to break into large shards than safety glass.
An inert gas commonly used between panes of insulated glass to reduce heat transfer and improve energy efficiency.
A window hinged at the top that opens outward from the bottom, allowing ventilation even during light rain.
A window configuration that projects outward from an exterior wall, typically made of a fixed center unit flanked by angled side windows.
The lower horizontal part of a window sash or frame, providing structure and support for the glass.
A multi-panel window that curves outward from a wall, usually made of four or more equal-sized units to create a gentle arc.
Exterior trim that surrounds a window or door frame, creating a finished transition between the unit and the siding or brick.