The Object Of This Contract Is The Provision Of Replacement Services For Filtering Elements In Ventilation And Air Conditioning Systems, As Well As Technical Cleaning In Selected Parts Of The Electromechanical Installations And The Supporting Infrastructure Of The Sta.Sy Network. The Purpose Is To Maintain A High Level Of Cleanliness And The Safe, Reliable Operation Of The Technical Equipment, Contributing To The Maximum Possible Availability Of The Infrastructure, For The Benefit Of The Passenger Public.