The Sunset Heat & Moisture Exchanger (HME) captures heat and moisture on expiration and returns it to the patient in inspiration. It is suitable for spontaneously breathing patients with a tracheostomy tube. It is an efficient heat and moisture exchanger to warm and humidify inspired air, reducing the risk of tube blockage from encrustations, with minimal resistance to flow. Pack Of 10 —TV Range: 150-1250 ml —Moisture Output (mg H2O/L): 36.4mgH2O/L at VT = 500 ml —Weight: 6.6g —Resistance (cm H2O): 30L/min: 0.2 cmH2O —Dead Space: 15ml.