K stands for air conditioning, F stands for split type, C window type, R thermal type, G stands for indoor unit wall type, L floor type, Q embedded type, and W stands for external unit. Numbers represent the number of people, 23 is a pony, 25 is a full horse, 26 is a big horse, 32, 35, 36, small, full, and a half-big horse. 45 young 2 horses, 50 positive 2 horses, 60 young 3 horses, 70,71,72 positive 3 horses, 75,80, big 3 horses. 100, 120 is five horses.