Portable concentrator rental: Many types of portable oxygen concentrators are for rent these days especially on the USA market. To give you a few examples: AIRSEP FreeStyle, SeQualEclipse 3, InvaCare XPO2, DeVilbiss iGo, SimplyGo, Inogen One G2, Philips Respironics EverGo, etc. You will find that each of them has it's own specialities. The difference is generally the weight, size, number of litres per minute and most important the capacity of the battery. As batteries generally loose strength and the equipment is vulnerable it could cause problems while travelling. To prevent a stressful holiday you should register for FREE for the OxygwneWorldwide S.O.S. Back-up service.