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    ResMed Dishwasher Safe H4i™ Water Chamber Upgrade Kit for HumidAire 3i™ Heated Humidifiers

    Top Review

    "This is the perfect uograde for the 3i. Holds more water and produces more humidity."

    May 24, 2014

    Product Overview

    Manufactured by ResMed.

    Product Features

    The Dishwasher Safe H4i™ Water Chamber Upgrade Kit for HumidAire 3i™ Heated Humidifiers is an upgrade kit for the S8 Series CPAP and VPAP machines that currently have the H3i Heated Humidifier. This upgrade kit includes a dishwasher safe water chamber.

    This kit will ship out in two pieces:

    • Dishwasher Safe chamber for H4i - ResMed part number 26958
    • Top Cover & Seal for H4i - ResMed part number 26953

    Improve humidity by 30% by switching to the H4i chamber design. Water capacity is increased to 390ml and the all-in-one design helps keep the system compact.

    Return On Warranty Issues Only


    This Product Includes...

    Product Specifications

    Water Capacity: 390ml to Max Fill Line

    Warranty Length: 1 Year always offers these services:

    • 8 am to 8 pm CST Toll Free Phone and Email Support
    • 24 hour access to our Support Forum
    • Learning Center for information on sleep apnea and cpap equipment
    • Consumer Purchasing Trends Reports
    • Warranty Services for all items purchased through
    • Insurance Compliant Invoices
    • Free Prescription Request System

    Manufacturer Note

    • Some product images supplied by ResMed © ResMed 2010 Used with Permission.
    • ResMed products are for sale only to patients within the U.S. and not to other third parties or businesses.
    • All services provided by, including advertisement, ordering, sale, delivery, instruction, and setup of the products are performed solely by and independently of the manufacturer.

    Important Tips

    The H3i water chamber is no longer available. Users must purchase this kit or the H4i™ Water Chamber Upgrade Kit for HumidAire 3i™ Heated Humidifiers which features a standard water chamber in order to use a H4i water chamber with the H3i.

    Once the H4i™ Heated Humidifier Top Cover Lid and Seal is purchased, either with this kit or by itself, the Dishwasher Safe Water Chamber for H4i™ Heated Humidifier or Water Chamber for H4i™ Heated Humidifier can be used. will ship out this kit as two separate products in ResMed packaging. Parts included:

    • Top Cover & Seal for H4i - ResMed part number 26953
    • Dishwasher Safe Water Chamber for H4i - ResMed part number 26958

    Maximum Fill Level Tips

    • Do not fill the water tank above the maximum fill line. Damage to the humidifier or therapy device may occur. If the water tank is overfilled, water may leak out of the tank inlet (located on the back of the tank) when installing the tank lid.
    • When disconnecting the hose from the tank outlet, be careful to ensure that the hose is not holding water. Water could travel through the hose and into the machine.
    • Use only room temperature distilled water in the tank. Do not put any chemicals or additives into the water. Possible airway irritation or damage to the water tank may result.
    • Remove the tank, empty all water, and replace the empty tank before transporting the humidifier base.
    • Do not attempt to fill the water tank while it is inside the humidifier.
    • To avoid spilling, do not disconnect the humidifier from the therapy device with water in the tank. Remove the water tank from the humidifier before disconnecting the therapy device.
    • Do not turn the humidifier on without the water tank installed. The Humidifier number setting must remain on 0 if there is no water in the water tank.
    • The humidifier door must be set in the open position before removing the water tank. Do not remove the water tank without making sure that the humidifier door locks into the open position.
    • Do not move the humidifier while the water tank has water in it.

    Manufacturer Warranty

    This product comes with a 1 Year Manufacturer Warranty. will work with the manufacturer on your behalf if the product needs repairs. Please follow these steps:

    • Contact us at or 1-800-356-5221 to receive an RMA (Return Merchandise Authorization) Number before returning the equipment
    • Include a note with the product describing the issue you are experiencing, along with your full contact information to include a return shipping address and the RMA number provided to you
    • Ship only the defective items to at 10101 Stafford Centre Drive, Stafford, TX 77477
    • Do not return accessory items such as the carry bag, hose or power cords
    • Loaner Humidifiers are available for rental during the warranty process
    • Email updates will be sent to keep you informed as the product moves through the warranty process
    • will contact the manufacturer on your behalf and handle all shipping between us and the manufacturer
    • The repaired or replaced unit will be returned to you. Shipping charges may apply.

    Please note: The manufacturer warranty is voided by water damage or misuse of the machine.

    Replacement Parts

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