Heated or passover humidification can definitely increase your comfort while completing your therapy. Humidification adds moisture to the air being blown into your airway, and without it, many patients find that they have significant drying out of their nostrils, mouths, and throats. Studies have shown that because patients' comfort levels are increased when humidification is added to therapy, their compliance with the therapy is also greatly increased as well. If you are purchasing your first CPAP or do not normally use humidification, we strongly recommend adding a humidifier to your machine. A great choice to look at is the Fisher & Paykel HC150.