An apparatus for use combined cooking and water heating, the apparatus including a combustion chamber for burning a fuel to generate heat, a cooking support positioned above the combustion chamber in use to allow cooking to be performed, a heat exchanger in thermal communication with the combustion chamber, a water reservoir coupled to the heat exchanger via delivery and return fluid paths, allowing water from the reservoir to be circulated through the heat exchanger to thereby heat the water in the reservoir, a separator provided in the return path to separate steam from heated water and a condenser element for condensing steam to thereby provide distilled water to a distilled water outlet.