Evaporative coolers, in some cases named "swamp coolers", do not need a compressor or condenser. Liquid drinking water is evaporated on the cooling fins, releasing the vapor into the cooled spot. Healthcare facility running theatres, wherein air is filtered to large ranges to reduce an infection possibility plus the humidity https://docs.google.com/spreadsheets/d/1sFkX-195bzbspltn6kI7pJAwHC_IWJIWy0giWMghe84