A humidification system comprising: a humidification chamber (104, 1104) configured to operatively connect to a base unit, the humidification chamber (104, 1104) comprising an inlet (410, 1410) and an outlet (412, 1412), the outlet (412, 1412) comprising an elbow connector; a circuit connector (500, 1500) comprising: an inlet configured to provide a fluid connection to the outlet (412, 1412) of the humidification chamber (104, 1104) to receive heated and/or humidified gases therefrom; an outlet configured to provide a fluid connection to a conduit for directing the heated and/or humidified gases to or from a patient or other person; an electrical terminal (502, 512, 801, 901) configured to provide an electrical connection to an electrical terminal (350, 802, 1388) associated with the base unit; and an orientator configured to orientate the circuit connector (500, 1500) relative to the outlet (412, 1412) of the humidification chamber (104, 1104), wherein the electrical terminal (502, 512, 801, 901) of the circuit connector (500, 1500) is substantially parallel to the inlet of the circuit connector (500, 1500) thereby enabling both the electrical and fluid connections to be effected in a single motion, and wherein the elbow connector is configured such that the electrical and fluid connections are effected in a direction substantially the same or parallel to the direction in which the base unit is configured to receive the humidification chamber (104, 1104). a humidification chamber (104, 1104) configured to operatively connect to a base unit, the humidification chamber (104, 1104) comprising an inlet (410, 1410) and an outlet (412, 1412), the outlet (412, 1412) comprising an elbow connector; a circuit connector (500, 1500) comprising: an inlet configured to provide a fluid connection to the outlet (412, 1412) of the humidification chamber (104, 1104) to receive heated and/or humidified gases therefrom; an outlet configured to provide a fluid connection to a conduit for directing the heated and/or humidified gases to or from a patient or other person; an electrical terminal (502, 512, 801, 901) configured to provide an electrical connection to an electrical terminal (350, 802, 1388) associated with the base unit; and an orientator configured to orientate the circuit connector (500, 1500) relative to the outlet (412, 1412) of the humidification chamber (104, 1104), an inlet configured to provide a fluid connection to the outlet (412, 1412) of the humidification chamber (104, 1104) to receive heated and/or humidified gases therefrom; an outlet configured to provide a fluid connection to a conduit for directing the heated and/or humidified gases to or from a patient or other person; an electrical terminal (502, 512, 801, 901) configured to provide an electrical connection to an electrical terminal (350, 802, 1388) associated with the base unit; and an orientator configured to orientate the circuit connector (500, 1500) relative to the outlet (412, 1412) of the humidification chamber (104, 1104), wherein the electrical terminal (502, 512, 801, 901) of the circuit connector (500, 1500) is substantially parallel to the inlet of the circuit connector (500, 1500) thereby enabling both the electrical and fluid connections to be effected in a single motion, and wherein the elbow connector is configured such that the electrical and fluid connections are effected in a direction substantially the same or parallel to the direction in which the base unit is configured to receive the humidification chamber (104, 1104).