Resmed Standard Water Chamber for H4I Heated Humidifiers Without Headgear keeping the mask sealed in

keeping the mask sealed in its proper alignment

The Fisher & Paykel Simplus Full Face Mask is designed for a secure and comfortable fit with minimal effort

Featuring QuickFit headgear

This machine DOES NOT deliver a breath on a timed basis

Lithium Ion battery

Resmed Standard Water Chamber for H4I Heated Humidifiers Without Headgear keeping the mask sealed inReplacement water chamber for a ResMed H4i heated humidifier. Provides optimal performance for H4i humidification system. This standard humidifier water chamber (with a frosted tub) will last for 6 12 months on average with proper care and maintenance. It is compatible with all H4i (HumidAire) Heated Humidifiers as well as H3i (HumidAire) Heated Humidifiers that have been upgraded using the H4i Upgrade Kit. Chambers should be filled with clean water