Air conditioner (AC) installation is a step-by-step process that ensures efficient cooling and long-term performance. It begins with selecting a proper location for the indoor unit, usually high on a wall, where airflow can be evenly distributed across the room. The outdoor unit is installed in a well-ventilated area to allow proper heat dissipation. A hole is drilled through the wall to connect refrigerant pipes, electrical wiring, and a drainage pipe between the indoor and outdoor units. These connections must be properly insulated to prevent energy loss and leakage. The system is then vacuumed to remove air and moisture before releasing refrigerant gas into the pipes. Electrical connections are carefully made with proper earthing for safety. Finally, the AC is tested to ensure correct cooling, airflow, and noise levels. Proper installation is very important because it directly affects the efficiency, durability, and energy consumption of the air conditioner.