Window units are compact air conditioning systems designed to fit into a window frame. They cool a single room by drawing in warm air, cooling it, and then blowing it back into the space. These units are popular for their ease of installation and affordability, making them a great choice for apartments or smaller homes. Most window units come with adjustable settings, allowing users to control the temperature and fan speed. They are also energy-efficient, helping to reduce electricity bills compared to central air conditioning systems. Many people rely on these units during hot summer months to stay comfortable indoors.