The antonyms for the word "air-cools" are "air-heats" or "air-warms". These terms refer to the opposite effect of cooling; that is, warming up the environment or object. Instead of circulating cool air, air-heating devices are used to produce warm air. They are used in colder climates or during winter seasons to counter the low temperature. Air-warming devices are essential in keeping the area or space comfortable and cozy. Additionally, they are used for drying up wet clothes, shoes, and damp corners of a room. With the use of air-warming devices, one can ensure a comfortable and warm atmosphere, even when the temperature outside is freezing.