Evaporative cooler
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An evaporative cooler is a device that cools air through the evaporation of water. Evaporative cooling differs from other air conditioning systems, which use vapor-compression or absorption refrigerat
An Egyptian qullah, set in drafts to cool interiors. Porous pottery and coarse cloth maximize the area for evaporation.
A salasabil cooling fountain (Red Fort, Delhi, India)
A traditional air cooler in Mirzapur, Uttar Pradesh, India
California ranch house with evaporative cooler box on roof ridgeline on right
Wood wool
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Wood wool, known primarily as excelsior in North America, is a product made of wood slivers cut from logs. It is mainly used in packaging, for cooling pads in home evaporative cooling systems known as
Evaporative cooler
…The evaporative cooler was the subject of numerous US patents in the 20th century; many of these, starting in 1906, suggested or assumed the use of excelsior (wood wool) pads as the elements to bring a large volume of water in contact with moving air to allow evaporation to occur. A typical design, as shown in a 1945…
Excelsior, or wood wool