This filter is to replace the existing grey foam filter for the following CPAP or BiPAP machines:
- M-Series
- System One
- System One 60
The clever people at Philips Resprironics suggest you replace your filters regularly to keep the machine in tip top condition and efficiency. So remember for this filter on your CPAP or BiPAP machine you should change this black filter at least every 6 months. The white ultra-fine filter should be changed at least every 4 weeks. Keep that sleep coming!