These ultra fine filters are designed for use with Fisher & Paykel's HC200 to HC221 Series CPAP Machines. Ultra fine filters are disposable; for optimal performance they should be changed regularly when they appear soiled or discolored.
The HC385 Humidifier Water Chamber is designed for use with all Fisher & Paykel 200 Series CPAP systems (HC200, HC201, HC220, HC221, etc.) as well as all SleepStyle 230, 240 and 250 series systems (HC231, HC232, HC234, HC242, HC244, HC254, etc). Each chamber has two ports -- one located on the side and one positioned on the top.
The HC355 Extended Life Humidifier Water Chamber is designed for use with all Fisher & Paykel 200 Series CPAP systems (HC200, HC201, HC220, HC221, etc.) as well as all SleepStyle 230, 240 and 250 series systems (HC231, HC232, HC234, HC242, HC244, HC254, etc). Each chamber has two ports -- one located on the side and one positioned on the top.