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.
This operating unit has the same exterior appearance as the (HOL-B) unit. The top area is fixed, and the bottom panel is part of an operable and an interior-removable assembly. A lower screen is an integral part of this assembly. This unit provides ease of ventilation, - without interchanging panels.