ResMed S9™ Series Hypoallergenic Fine Filters Description
Disposable Fine Filters are capable of collecting and trapping very small particles that may inhabit our air, such as smoke, dust and dirt. Fine Filters help to prevent irritation that may affect your lungs and small airways, making your sleep therapy more productive. Disposable filters cannot be washed and should be replaced once dirt is noticed (once a month or whichever occurs first).