Hello Carolyn, Because the oxygen concentrator is simply circulating the air with the House you’re in and concentrating it, I are unable to guarantee it’s Safe and sound to use your portable concentrator exterior your own home. Don’t smoke near your own home oxygen machines, such as tanks or concentrators. https://allhealthmarket.com/product/medical-supplies/portable-oxygen-concentrator-generator/oxygen-concentrator-machine-camping-use-oxygenator-driving-oxygen-bar-with-24-hours-battery-lasting-oxygen/