A container manufacturing plant (10) includes an air circuit (78) employing a recycling method that includes at least the successive steps of: extracting filtered air from an oven (26), after the air has been used in the latter, for the purpose of cooling at least one part of the preforms treating the sterilizing agent present in the extracted air resulting from the sterilization of the preforms and recycling the extracted and treated air to the industrial area (16) where the plant (10) is installed. An air recycling method is also described.
