Air conditioning is a system that cools and dehumidifies the air in a building or vehicle. It works by removing heat from the indoor air and transferring it outside, making the indoor environment more comfortable, especially during hot weather. Most people enjoy the refreshing coolness that air conditioning provides, especially in summer months. In addition to cooling, air conditioning systems can also filter the air, removing dust, pollen, and other allergens. This helps improve indoor air quality, making it healthier for everyone. Many homes and offices use central air conditioning systems, while window units are popular for smaller spaces.