The Level 1 convective warming system consists of a high-flow convective warmer with hose-end temperature control, a convective warming blanket, and accessories. The convective warmer draws ambient-temperature air through a HEPA air filter. The filtered air is warmed to a selected temperature. The warmed air enters the convective warming blanket through the hose and is distributed through delivery channels.

Perforations on the patient side of the blanket gently disperse warm air over the patient. The safety circuit provides an independent means to discontinue power to the heater. This design prevents exposing the patient to excessive temperatures, while continuously monitoring over and under temperature alarms for each setting.