Get dependable oxygen delivery with the EverFlo Oxygen Concentrator from Philips Respironics. Say farewell to bulky oxygen tanks that need constant refills. This convenient and low-maintenance concentrator is simple to operate and keep up with, making it the most reliable and cost-effective choice available. EverFlo OPI is capable of delivering up to 5 LPM of oxygen with 96% purity. Breathe freely with EverFlo.