The central air conditioning system is used for cooling big buildings, houses, offices, entire hotels, gyms, movie theaters, factories etc. If the whole building is to be air conditioned, HVAC engineers find that putting individual units in each of the rooms is very expensive initially as well in the long run. The central air conditioning system is comprised of a huge compressor that has the capacity to produce hundreds of tons of air conditioning. Cooling big halls, malls, huge spaces, galleries etc is usually only feasible with central conditioning units.

中央空调系统是用于冷却大的建筑、住宅、办公室、整个酒店、体育场馆、影剧院、和工厂 等。如果整个建筑都需要冷却，空调工程师发现，把空调放置在每一个房间，最初的费用是十分昂贵和长期的使用也是一样。中央空调系统是由一个巨大的压缩机， 具有产生冷制数百吨的能力。冷却大厅、商场、巨大的空间、和画廊等通常是唯一可行的中央空调机组。