Maintaining your POC is of the utmost importance to ensuring it continues to operate for many years to come. Changing the filters and sieve beds per manufactures guidelines is recommended. If you are in a home with pets you may need to change your filters more frequently. Nasal Cannulas and Oxygen Tubing should also be replaced on a regular basis. Please see recommended replacement schedule. Go2POC offers a Membership Program that will send you replacement disposables at the recommended intervals.