Hello all , I’m selling a Like new refurbished 3b life style oxygen concentrator 5 liter was purchased just 2 months ago warranty till 2027 at home oxygen supply locally ,was used like 3 times for our grandpa he was bump up to higher liter to 6 lpm so this one won’t be needed, has new air filter I purchased & installed just a 2 ago no issues at all runs smooth , very quite and very energy efficient .. I paid 850$ asking 340$