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　　There are three types of water collection methods for water air conditioners : groundwater collection, river water collection, and sewage collection.

　　1. First, let’s look at air conditioners that use underground water, also known as “geothermal water air conditioners”. This "water air conditioner" uses the temperature of groundwater to circulate indoors to achieve a cooling effect;

　　2. Secondly, water air conditioning using river water is mostly used in commercial buildings because the cost is too high;

　　3. Sewage collection. It sounds like recycling the discharged sewage is definitely an environmentally friendly and economical thing. However, the price of this water air-conditioning equipment is higher than that of Jianghe water air-conditioning. First, the sewage must be purified, then the temperature must be cooled and air supplied, and then part of the sewage must be discharged.