Abstract: A piggery comprises a water-cooled metal ceiling, said piggery being run by making the cooling of the metal ceiling and of the air carried into the piggery through openings in the ceiling, dependent primarily of automatical sluicing devices and secondarily controlled by temperature and relative moisture in the piggery in such a manner that the flow of cooling water, which is completely or partially introduced through water nozzles over the metal ceiling, is increased when the automatical sluicing devices are worked or the temperature in the piggery is too high, whereby optimum conditions for the interior climate of the piggery are obtained with the least possible draft.