How do you check/read the hours on a oxygen concentrator?

There is an hour counter located on the outside of your oxygen concentrator. It will allow you to see how many hours your oxygen concentrator has run.

If you have additional questions, please refer to your owners manual for your specific unit's maintenance on how to check the hours on a unit. If you do not have your owners manual it may be found here: https://www.oxygenconcentratorstore.com/oxygen-concentrator-manuals/