This unit has a single panel which removes directly to the interior. An interchangeable screen is available. This is an excellent unit for single vent inswinging wood casements or a double-sash inswinging wood “french casement” window.
This is the normal and most popular unit for standard wood double-hung windows. The top is fixed and the bottom panel is removable to the interior. An interchangeable screen is available. The horizontal divider for the master frame of the (HOL) is aligned with the meeting rail on the existing window.
Both panels of this unit remove directly to the interior. Interchangeable screens available for both panels. Typically used where upper ventilation is desired for a double-hung, or for very large inswinging wood “french casements” or folding steel windows.
Eastern style wood double-hungs have a facing board, - but no blindstop (like a Western casing). To avoid an unsightly “overlap” installation, the (HOL) unit is mounted inside the 3/4” facing board to provide a flush appearance. This is accomplished either by mounting (head and jambs) to a 1/2” channel stop, or nesting inside a 1/2” x 3/4” angle.
The Top Outside-Removable (TOR) feature is designed for double-hung openings where the top sash is not operable, and it allows access to the upper area for cleaning. It is also used in lieu of the fixed upper glass on Operating Historic One Lite (HOL-OP) units. This outside-removable panel uses "invisible clips" that are flush.