A casement window is hinged at the side and opens outward. It provides excellent ventilation—at times literally reaching out and catching the breeze. It looks like a narrow picture window because, unlike double hung or sliding windows, it has no rail to obstruct the view.
Some casement windows are simply pushed open, but most have a hand crank. Screens are placed on the inside of the window, where they're more protected from the elements. If you're installing windows over a sink, countertop or appliance, a casement window with a crank can be the perfect solution.
One of the things to look for in a casement window is how far it opens. The best open up perfectly perpendicular to the house for maximum ventilation.
Every window and door purchase is different. Get pricing information and estimates on your project.