The AirSpiral heated breathing tube for Airvo 2 utilizes an advanced two-spiral design to help protect against condensate.
The heating spiral contains heater wire to warm the breathing gas inside the tube. The insulating spiral uses a bubble of warmed air around the breathing gas to shield it from the outside environment. Like a double-paned window, the inside and outside surfaces of the tube are physically separated, to reduce cooling and helps maximize the level of humidity remaining in the gas all the way to the patient.