Abstract: This invention relates to a compact evaporator cooler apparatus having a vaporizer means mounted within a housing means and a fluid supply means connected to the vaporizer means for the mixing of air and water to thoroughly saturate the air. The vaporizer means includes a power assembly having a motor member with a central shaft to drive a vaporizer disc on one end and a fan blade at the other end to achieve a thorough vaporization or fogging of water particles discharged outwardly from the vaporizer disc. The vaporizer means further includes a filter assembly having a filter member operable to filter the air therethrough and permit the cooled air to pass therethrough to the area to be conditioned.