Chilled water is a commodity often used to cool a building's air and equipment, especially in situations where many individual rooms must be controlled separately, such as a hotel. The chilled water can be supplied by a vendors, such as a public utility or created at the location of the building that will use it, which has been the norm. == Use == Chilled water cooling is very different from typical residential air conditioning where water is pumped from the chiller to the air handler unit to cool the air. Regardless of who provides it, the chilled water (between 4° and 7°C) is pumped through an...