607345 A patient circuit (300) for delivering improved support to a patient, the patient circuit comprising: at least one limb (102) comprising: a nonconfigurable region (302) defining a first interior flow passage having a first end and a second end, and a heating wire disposed within the first interior flow passage, the heating wire having a first end (306) and a second end corresponding to the first and second ends of the nonconfigurable region and a configurable region (112) defining a second interior flow passage between an inlet, and an outlet that is coupled to the patient. The second end of the nonconfigurable region is slidably coupled to the inlet of the configurable region and the configurable region is adjustable (308, 310) so as to adjust a distance from the second end of the heating wire through the second interior flow passage to the patient.