Extraction without compressed air. Part of the anesthetic gas escapes into the environment during anesthesia. The removal of these gases is a requirement of the professional association, since anesthetic gas mixtures are shown to be harmful to health. In order to protect staff and patients, the anesthetic gases must be discharged outdoors in rooms where anesthesia is administered. To discharge the excess gases, we offer a fan-controlled anesthetic gas transmission system, which does not require a compressed air supply, but only a 230V socket.