Ceiling cassette air conditioner, is a type of air conditioning system that is primarily designed for commercial or larger residential spaces. It is named after its distinctive appearance, resembling a cassette tape when installed in the ceiling.

Cassette AC consists of a compact indoor unit that is recessed into the ceiling, typically in the center of the room. It features multiple air outlets or vents arranged in a grid pattern, allowing the cooled air to be distributed evenly throughout the space. The number and layout of vents may vary depending on the model and capacity of the unit. The outdoor unit, which houses the compressor and other refrigeration components, is typically located outside the building, similar to other air conditioning systems. The indoor and outdoor units are connected by refrigerant lines, electrical wiring, and drainage pipes.

Cassette AC are known for their 360-degree airflow, which provides efficient and uniform cooling. They offer a high cooling capacity, making them suitable for cooling larger areas. The direction of the airflow can usually be adjusted to suit the room layout and occupants' preferences. Cassette AC are commonly used in offices, shops, restaurants, conference rooms, hotels, and other commercial spaces where a discreet and efficient cooling solution is desired.

These AC systems often come with advanced features such as built-in filters to improve air quality by removing dust and allergens, as well as options for heat mode, fan-only mode. Some models also have smart features and can be controlled remotely via a smartphone or other devices.