A cassette air conditioner is a type of air conditioning unit that is mounted in the ceiling of a room. They are named for their square cassette-like shape. They are a popular option for large rooms or open floor plans because they can distribute air evenly throughout the space.
Cassette air conditioners typically have a four-way airflow design, which means that cool air is blown out in all four directions. This helps to ensure that the entire room is cooled evenly.