From Philips Respironics
Until now, oxygen concentrators have been very similar - heavy, bulky, noisy, or require frequent maintenance. But EverFlo from Respironics is a unique stationary concentrator that delivers the features homecare providers want and patients deserve. (With OPI) Lightweight and easy to transport at 31 pounds With Oxygen Percentage Indicator (OPI) - alarm that sounds when oxygen levels fall below 70% Compact, ergonomic design takes up less space, looks less like a medical device One of the quietest mainstream concentrators No homecare provider filter change for two years Uses less power and produces less heat, so its more patient-friendly No filters for the patient to change