CPAP Newsletter Newsletter Archive Subscribe Newsletter Archive Subscribe Sign-up for our weekly newsletters for CPAP articles, tips and special offers! Submitting... Sign Up No, thanks CPAP Newsletter: CPAP Machines 101 Newsletter Title What's the difference between CPAPs, APAPs and BiPAPs? CPAPs: Continuous CPAP machines blow air at a single set pressure, providing a constant flow no matter how open or closed your airway is. APAPs: Automatic APAP machines adjust pressure on a breath-by-breath basis to provide the minimum amount needed. BiPAPs: BiLevel BiPAP machines produce air at two distinct pressures: a higher pressure at inhalation and lower pressure at exhalation. Many users prefer APAPs for their advanced capabilities and added comfort. Top-Selling CPAPs AirStart™ 10 "...easy to setup and operate, extremely quiet and compact..." - Jonathan ICON Premo "So advanced, in terms of features, and it is so quiet!" - Kim Top-Selling APAPs AirSense™ 10 AutoSet™ "When I need more air it ramps up, monitoring & providing what I need." - Thomas Transcend Auto "I love the ramp up feature. I go to sleep...breathing very comfortably." - Robert Top-Selling BiPAPs PR System One "It automatically picks and adjusts the pressure...to make breathing easier." - Todd DreamStation BiPAP "Best machine I ever used, so silent and smart, I also love the smartphone app." - Selen A CPAP prescription can be used to buy an APAP. Today's final lesson: replace parts as needed Monthly 6 to 12 Months 3 to 6 Months Maintain effective therapy and achieve better sleep results by replacing vital equipment parts often. View our full CPAP Replacement Schedule.