The cooling system at the Grand Mosque in Makkah, managed by the General Authority for the Care of the Grand Mosque and the Prophet's Mosque, is recognized as one of the largest in the world. It boasts a cooling capacity of up to 155,000 tons, distributed through two main stations, Kadi Station and Al-Shamiya Station, with capacities of 120,000 and 35,000 tons, respectively. The advanced cooling system not only provides comfort to millions of visitors but also ensures the air quality by purifying it nine times a day. The air is sterilized using ultraviolet rays, achieving a purification rate of 100%. The process is vital in maintaining a germ-free environment within the mosque's various areas. The system is meticulously managed by the Technical, Operational, Maintenance, and Facilities Management Agency, which ensures the electromechanical systems are operating optimally. Technicians adjust air distribution based on visitor numbers to maintain thermal comfort while maximizing energy efficiency. The tempera ture within the Grand Mosque is controlled year-round, maintaining an average of 20 to 24 degrees Celsius, regardless of external weather conditions. The intricate cooling and air purification system underscores the commitment to providing a safe and comfortable environment for pilgrims, reflecting the importance of technological and operational excellence in maintaining the sanctity and comfort of the holy site. Source: Saudi Press Agency