Yes, window air conditioning units are quite common in the United States. Many people in the U.S., especially in residential settings, use window air conditioners to cool individual rooms or specific areas of their homes. These units are designed to be installed in a window opening, with the front portion of the unit facing indoors to provide cooling and the back portion protruding outside to exhaust heat.
Window air conditioners are popular because they offer a relatively affordable and convenient cooling solution, especially for smaller spaces or rooms where central air conditioning may not be practical or cost-effective. They are often used in apartments, single-family homes, and even some commercial spaces. However, it's worth noting that the prevalence of window air conditioning units can vary depending on factors such as geographical location, climate, and building infrastructure. In regions with hotter climates or areas that lack central air conditioning systems, the use of window units tends to be more common.