A mechanical device (normally spring-loaded) used in single- and double-hung windows as a means of counterbalancing the weight of the sash during opening and closing. UniShield windows come with a true balance system, and no weights for a cleaner look and for consistent performance.
An arrangement of three or more individual window units, attached so as to project from the building at various angles. In a three-unit bay, the center section is normally fixed, with the end panels operable as double-hung or casement windows.
A rounded bay window with 5 or more sashes – often all of them open.
A requirement in most cities to ensure the installation meets state building code requirements.