How the HVAC system of the Grand Mosque in Makkah delivers a constant flow of chilled, germ-free air

How the HVAC system of the Grand Mosque in Makkah delivers a constant flow of chilled, germ-free air

The air conditioning system in the mosque has a cooling capacity of 155,000 tons, harnessed through through two of the largest cooling stations in the world: Ajyad and Shamiya. The Shamiya station, situated 900 meters from the Grand Mosque, produces 120,000 tons of cooling power. The station in Ajyad, located 500 meters away, has a production capacity of 35,000 tons.

Nine times a day, the air delivered in the Grand Mosque in Makkah, Saudi Arabia, undergoes rigorous purification as well as sanitization with ultraviolet technology to supply a constant flow of chilled, germ-free air to worshippers.

The refrigeration units at the two stations chill the water, bringing it down to a temperature of 4 to 5 degrees Celsius. Water then travels through a network of pipes to the Grand Mosque. Arriving at the mechanical air handling units, heat exchange takes place and then purified and cooled air is released throughout the mosque. The air handling units have recently undergone a comprehensive renewal and upgrade, with the agency replacing heat exchangers as well as air filters responsible for consistent air purification.

The purification process is a multi-phase journey that starts with natural air being drawn from the Grand Mosque through highly efficient and technologically