Window Operation

Window operation is one of the most crucial choices to consider when selecting a window sash. Offering a variety of styles and functions applicable to specific conditions, a range of window operations should be considered to best meet your needs for ventilation, operability, screening, and daylighting. The primary difference between window operation types are between projected or hinged types such as casement, awning, and hopper windows and the sliding variety of windows that includes double-hung, single-hung, and sliding types. Other specialty types include pivoting, jalousie, skylights, and storm windows.

Common Questions

* Under Development *

Fixed Windows
Front elevation drawing of a Fixed Window
Fixed windows are comprised of a frame and a static sash. If paired with operable windows, the thickness of the fixed sash should best match the cross-sectional dimensions of the operable sash.
Fixed windows are comprised of a frame and a static sash. If paired with operable windows, the thickness of the fixed sash should best match the cross-sectional dimensions of the operable sash.
Fixed Windows

*Under Development*

Ventilation: 0%
Sashes:
Fixed
Operation:
Stationary

Drawings include:
Fixed Windows front elevation, axon

Details & Downloads
Casement Windows
Casement Window front elevation drawing
Casement windows are side-hinged with sashes that swing outward. Because of their outward rotation, casement windows provide significant direct ventilation and are often better suited for ventilation purposes compared to windows of equal size.

Casement windows are side-hinged with sashes that swing outward. Because of their outward rotation, casement windows provide significant direct ventilation and are often better suited for ventilation purposes compared to windows of equal size.

Casement Windows

*Under Development*

Ventilation: 100%
Sashes: Side-Hinged
Operation: Outward swing
Variations: Screen, sliding track, vertical mullion, floating astragal

Drawings include:
Casement Window front elevation, axon

Details & Downloads
Awning & Hopper Windows
Front elevation drawing of Awning & Hopper Windows
Awning windows haves top-hinged sashes that swing outward from their frame. Hopper windows haves bottom-hinged sashes that swing inward from their frame. Both variations of window types allow for ventilation when open and have low air leakage rates as their sashes close tightly against the frame.
Awning windows haves top-hinged sashes that swing outward from their frame. Hopper windows haves bottom-hinged sashes that swing inward from their frame. Both variations of window types allow for ventilation when open and have low air leakage rates as their sashes close tightly against the frame.
Awning & Hopper Windows

*Under Development*

Ventilation: 100%
Sashes (Awning):
Top-hinged
Operation (Awning):
Outward swing
Sashes (Hopper):
Bottom-hinged
Operation (Hopper):
Inward swing
Variations:
Screens, vertical sashes, stiles

Drawings include:
Awning & Hopper Windows front elevation, axon

Details & Downloads
Sliding Windows
Drawing of a standard Sliding Window in front elevation
Sliding windows have two or more sashes that slide horizontally. Double-sliding windows allow for both sashes to slide, while the single-sliding option only allows for one sash to slide while the other remains fixed. Slider windows can adjust ventilation from open (50% max) to a small opening.
Sliding windows have two or more sashes that slide horizontally. Double-sliding windows allow for both sashes to slide, while the single-sliding option only allows for one sash to slide while the other remains fixed. Slider windows can adjust ventilation from open (50% max) to a small opening.
Sliding Windows

*Under Development*

Ventilation: 50% max, flexible opening
Sashes: Two or more
Operation: Slides along tracks
Variations: Double, single, screen, pivot capable

Drawings include:
Sliding Window front elevation, axon

Details & Downloads
Double-Hung Windows
Front elevation drawing of a Double-Hung window
Double-hung windows have two or more sashes that slide vertically. Double-hung windows allow for both sashes to slide in separate tracks, while the single-sliding option only allows for one sash to slide while the other remains fixed.
Double-hung windows have two or more sashes that slide vertically. Double-hung windows allow for both sashes to slide in separate tracks, while the single-sliding option only allows for one sash to slide while the other remains fixed.
Double-Hung Windows

*Under Development*

Ventilation: 50% max
Sashes: Two vertical
Operation: Slides along tracks
Variations: Double, single, screen, counterweights, pivot capable

Drawings include:
Double-Hung Window front elevation, axon

Details & Downloads
Jalousie Windows
Illustration of a Jalousie Window viewed from the front profile
Jalousie windows, or louver/louvre windows, is a window type with horizontal louvers set in a common frame with a track that allows for the user to simultaneously pivot the louvers. Because of this control, the jalousie window type can flexibly adjust airflow, light, and privacy with ease.
Jalousie windows, or louver/louvre windows, is a window type with horizontal louvers set in a common frame with a track that allows for the user to simultaneously pivot the louvers. Because of this control, the jalousie window type can flexibly adjust airflow, light, and privacy with ease.
Jalousie Windows

*Under Development*

Ventilation: 100% max
Louvers: Horizontal
Operation: Simultaneous pivot (jalousie), fixed (louver)
Variations: Louver dimensions, louver materiality, operable (jalousie) or fixed (louver)
Use: Mild climates; control ventilation or visibility

Drawings include:
Jalousie Window front elevation, axon drawing

Details & Downloads
Pivoting Windows
Elevation drawing of a Pivoting Window showing operation
Pivoting windows are a type of window with sashes that can rotate 90°-180° around a horizontal or vertical axis usually located on or near the center of the sash. The rotation of a pivoting window allows for full ventilation, but cannot be equipped with a screen for filtering.
Pivoting windows are a type of window with sashes that can rotate 90°-180° around a horizontal or vertical axis usually located on or near the center of the sash. The rotation of a pivoting window allows for full ventilation, but cannot be equipped with a screen for filtering.
Pivoting Windows

*Under Development*

Ventilation: 100%
Sashes: Pivoting
Operation: Rotates 90°-180° around axis
Uses: For cleaning, maintenance, emergency ventilation

Drawings include:
Pivoting Windows front elevation, axon

Details & Downloads