The replacement Humidifier Water Chamber is Fisher & Paykel’s SleepStyle Humidifier Water Chamber designed for use with the SleepStyle CPAP Machine and should be replaced every six to 12 months to keep your CPAP equipment working well. The Humidifier Water Chamber can be washed once weekly in the dishwasher. The replacement Humidifier Water Chamber is the same chamber included with the SleepStyle Humidifier Water Chamber . This product only includes the water chamber. General Tips Section Recommended Fill Capacity: 12.8 ounces (Approx. 380 mL) Device Life Expectancy: 6 - 12 months Dishwasher Safe? Yes, but only once per week. Fill Instructions: The humidifier water chamber for the F&P SleepStyle is intended to be filled through the circular holes in the top of the chamber. For best results, use a container of distilled water and do not use tap water. Remove the water chamber from the device. Remove the outer seal from the top of the humidifier chamber. While paying attention to the fill line embossed with the word "MAX", begin filling through the circular cutouts on top of the chamber. Once the water level reaches the fill line, stop filling. Cleaning the Humidifier Tank: Remove the seal, and clean separately with mild soap and water. Do not use chemicals or household cleaners, as these can be harmful. Flip the latch on the side to the "open" position, and open the humidifier chamber. Be sure to clean thoroughly, removing any debris or any chalky film at the bottom of the tank. If there's a lot of buildup, it's we recommend using vinegar to disinfect and help remove deposits. Allow all parts to air dry before next use. Cleaning Tips Most cleanings should be done by hand. Once a week, it is safe to wash in the dishwasher. Avoid over-using the dishwasher for cleaning, as this can damage the tank Use Only Distilled Water If you've ever used tap water with your SleepStyle, you'll be familiar with the hard chalky substance at the bottom of the water tank. This happens whenever tap water is used and is the result of minerals and deposits in the water getting left behind as your humidifier water is used. Using distilled water will eliminate this problem and make it a lot easier to clean. It's intended for the SleepStyle to only use distilled water as part of CPAP therapy. For Best Results, Make Sure Humidifier is Sealed Before Use Make sure the lid seal is in place before running the humidifier. This is needed for the humidifier to work properly. Warnings & Precautions WARNING: Make sure the humidifier tank is completely empty before traveling or transporting the device to prevent spills and damage to the machine. WARNING: It is dangerous and harmful to fill the water chamber with boiling water. Doing so can risk damage or loss. WARNING: Do not use flavored water, carbonated water or water with essential oils in the humidifier chamber, as this can cause damage or loss of the SleepStyle. Please use only distilled water. 900SPS100