Any process in which a liquid is converted into its gaseous phase by the addition of heat to the liquid: "An example is the evaporative condenser that is an apparatus that utilizes the evaporation of water by air at the condenser surface as a means of dissipating heat."

An air-cooling unit that turns ambient air into moist, cooler air: "The evaporative cooler in Bill's apartment made things more comfortable by saturating the hot summer air with water vapor."