Awning windows open outward from the bottom up. They are operated by cranking a handle that pushes the bottom of the sash out, allowing excellent ventilation while keeping rain water away.
Casement windows open outward by cranking a handle and provide a great unobstructed view to the outside as well as superior ventilation. Replacement vinyl casement windows can open to the left or right depending on your preference.
Casement fixed windows are a combination of casement and fixed windows. Casement windows can open to the left or right depending on your preference, while the fixed side is stationary.