C40 Dual Climate Control device, a supplied air regulator manufactured by RPB® (MFG #03-501). The regulator is a popular add-on to the Nova 2000 or the Nova 3 helmets. With that said, the C40 Climate Control device is a belt mounted air regulator and temperature control unit for RPB’s supplied air regulator range. What is the temperature range of the C40? You can cool the incoming air by up to 52°F (29°C) or heat it by up to 33°F (18°C) from the incoming air. Exhaust air is directed away from the body instead of down the leg. This is achieved by simply switching the mixing lever from hot to cold a Airline requirements for the device recommends 55-100psi (Depending on airline type). With that said, designed for use in many different industries such as blasting, painting, grinding, adjust the air temperature in the respirator hood with ease.