This invention relates to apparatus used to heat, humidify and filter insufflated gases to alter the temperature and humidity of gases prior to delivering the gases into a patient The apparatus includes an insufflator, humidifier and gas transportation conduit connected to gas delivery tubing to deliver humidified and heated gases to a body cavity prior to and during a medical procedure. The insufflator an humidifier are contained in the one housing, enabling the housing to be located remote from an operating table. The gas transportation conduit delivers the humidified gases to the body cavity in a flexible tubing having located within, throughout or around it heating apparatus enabling the gas temperature and humidity levels to be maintained from the housing to the patient.