Different from common ceiling air conditioners, in the design of this kind of ceiling air conditioner, the air-inlet grille is concealed under the panel, so its look is much simpler. Also the half-concealed design can prevent dust inhalation while ensuring the cleanliness of air-inlet grille. The air-outlet grille is located at all four sides of the panel ensuring that the out coming air is better dispersed in all directions. Due to this the model is simpler and can be better integrated into the ceiling.