To keep the air quality running through your CPAP machine at it's optimum, your filter will need replacing. You should check your filter every month for signs of discolouration or wear and tear. If your filter looks like it has seen better days, you can choose replacement filters here. Most filters should be replaced every 4-6 weeks depending on the number of hours you use your machine for each night.
We stock a selection of filters for CPAP machines from ResMed, Fisher & Paykel and Philips Respironics.