Abstract: A water purifying apparatus having an inner chamber to be filled with contaminated water which is heated by a heating unit to a point where water vapor or steam is created. The steam is evacuated from the chamber at its upper portion and passes downwardly in contact with a condensing wall having cooling vanes disposed on the exterior thereof into a trough provided near the base of the apparatus from whence it is drained off into a container located below the chamber. A cover surrounds the cooling vanes forming an annular air passage and is so constructed that open areas exist near the base of the cover. The cover has an aperture on the top and a fan is disposed below this aperture. Thus cooling air is carried from the open areas near the base of the apparatus upwardly over the vanes and to the aperture at the top where it is continuously evacuated.