Abstract: A distillation system for sea water is provided with a fan to force air under pressure through a heating chamber having a heat exchanger to heat the air, a passageway from the heating chamber for directing the heated and pressurized air to an evaporator in which a reservoir of sea water is maintained at a predetermined level and in which cylindrical horizontally disposed brushes are partially submerged in the sea water and rotated as the heated air from the heating chamber passes over the rotating brushes with the brushes rotated at a sufficiently high speed to keep the brushes wet thereby preventing the formation of scale on the brushes. The moisture laden heated air then flows through a condenser which includes a heat exchanger utilizing sea water as the cooling medium and includes an outlet valve which permits the condensed water to be withdrawn for use.