Airon’s MACS CPAP System and pNeuton model S ventilator with CPAP are designed for critically ill patients in emergency medicine. MACS, the next generation Face Mask CPAP system, is the most economical CPAP system available today. Using the same efficient design as the pNeuton ventilators, MACS’s demand flow system delivers CPAP without wasting oxygen. A calibrated knob sets the CPAP level and a switch selects 65% or 100% oxygen. MACS CPAP and the pNeuton model S ventilator – portable, affordable CPAP for critical and emergency care.