Casement windows — the original air-conditioning

When discussing windows and how they open, people in the industry will talk about the configuration of the window. Configuration is a piece of jargon to describe how a window opens.
A casement window is a configuration for an opening window that can be best described as a window that opens like a door.
Casements can be hinged on either the left or right side. This gives you the option of how best to scoop fresh air from the outdoors by changing the angle of the window— the cheapest air-conditioning money can buy! It may be best to consider casement windows as a pair, in order to maximize airflow.
A casement window must be somewhat restricted on width because its hardware can only take so much weight when opened. Where a casement window with restricted width doesn’t fill the existing window space, the casement can be combined with another configuration.
The casement window is constructed with three points of weather-strip, making it perhaps the warmest and best sealing configuration on the market.