Most oxygen concentrators are created with durability in mind, as they’re used to help the person travel and accomplish their daily tasks. A new device should likely last someone from five to seven years depending on the concentrator and how it’s used daily. Many of these devices come with a warranty, which typically lasts for two years. “It’s like buying any household appliance,” Dr. Rizzo says. “You want to check the warranty and trust who you’re buying or renting it from.”