Hi Carolyn, Considering that the oxygen concentrator is simply circulating the air from the House you’re in and concentrating it, I simply cannot assure it’s Risk-free to make use of your portable concentrator outside your own home. What oxygen level is standard while sleeping? Oxygen concentrations previously mentioned 90% are https://bookmarkingfeed.com/story13954488/top-latest-five-oxygen-concentrator-humidifier-urban-news