Questions? 1-800-356-5221

Chat with a 5-star expert now!

Questions? 1-800-356-5221

Chat with a 5-star expert now!

  1. Home /
  2. CPAP Supplies /
  3. CPAP Humidifiers /
  4. Humidifier Chambers /
  5. ResMed

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

BY ResMed  |  Item #26959
(147) Read Reviews
$36.00

Need Replacement Parts or Accessories? Shop now

Get Your Sleep Back

Face Sleeping

Setup is easy & takes minutes

Truck Fast

Orders ship within hours (M-F)

Arrows Rotate

Resupply items set to autopilot

Item # 26959

Not currently in stock

Water Chamber for H4i™ Heated Humidifier
Water Chamber for H4i™ Heated Humidifier
H4i™ Heated Humidifier Top Cover Lid and Seal
H4i Chamber shown installed. Humidifaire Humidifier sold separately
Product image for H4i™ Water Chamber Upgrade Kit for HumidAire 3i™ Heated Humidifiers - Thumbnail Image #4
How to Clean and Maintain your CPAP Equipment
Rainout, Causes & Solutions
H3i and H4i Humidifier Differences and Upgrade Path
Click image to expand
Water Chamber for H4i™ Heated Humidifier H4i™ Heated Humidifier Top Cover Lid and Seal H4i Chamber shown installed. Humidifaire Humidifier sold separately Product Thumbnail Image #4
1/4
Water Chamber for H4i™ Heated Humidifier H4i™ Heated Humidifier Top Cover Lid and Seal H4i Chamber shown installed. Humidifaire Humidifier sold separately Product Image for H4i™ Water Chamber Upgrade Kit for HumidAire 3i™ Heated Humidifiers - Thumbnail Image #4
1/4

H4i Upgrade Kit for HumidAire 3i

The This is the H4i Upgrade Kit for S8 CPAP and VPAP Series H3i Heated Humidifier. The kit ships out as two separate pieces:

  • H4i Top Cover & Seal - ResMed part number 26953
  • H4i water Chamber - ResMed part number 26952

Switch to the H4i chamber design and improve humidity by 30%. The All-in-one design helps keep the system compact as well as improving water capacity up to 390ml. This upgrade kit is not dishwasher safe.

What's Included:

  • 1 Top Cover & Seal
  • 1 H4i Water Chamber

H4i Upgrade Kit for HumidAire 3i

The This is the H4i Upgrade Kit for S8 CPAP and VPAP Series H3i Heated Humidifier. The kit ships out as two separate pieces:

  • H4i Top Cover & Seal - ResMed part number 26953
  • H4i water Chamber - ResMed part number 26952

Switch to the H4i chamber design and improve humidity by 30%. The All-in-one design helps keep the system compact as well as improving water capacity up to 390ml. This upgrade kit is not dishwasher safe.

What's Included:

  • 1 Top Cover & Seal
  • 1 H4i Water Chamber

Learn More About This Product

Humidaire H3i Water Chambers are no longer available. H3i users must purchase this kit or the Dishwasher Safe H4i™ Water Chamber Upgrade Kit to use either the H4i Water Chamber or Dishwasher Safe H4i Water Chamber.

As of May 2013 - CPAP.com will ship out this kit as two separate products in ResMed packaging. ResMed is no longer making the pre-packaged kit available. The instructions for installation is not included. Part numbers included:

  • H4i Top Cover & Seal - ResMed part number 26953
  • H4i water Chamber - ResMed part number 26952

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.

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

What are the benefits of using a humidifier?
Many CPAP users experience nasal congestion and dryness of the nose and throat during treatment. This can be especially problematic for new users who are adapting to treatment. Humidification adds moisture to the air helping to reduce the symptoms of dryness and congestion.

Nasal congestion also leads to mouth breathing, which perpetuates the problem of dryness. If this is an issue for you, try a heated humidifier.
What is a heated humidifier?
A heated humidifier uses heat to warm the water to add moisture to the airstream. The heat is adjustable for more or less moisture. A heated humidifier water chamber is much smaller than a passover humidifier water chamber.

In our experience, it is common for CPAP users to report that their therapy is greatly enhanced by the use of a heated humidifier.

There are three types of heated humidifiers:

What is a passover humidifier?
A passover humidifier uses a chamber of room temperature water with the CPAP to add moisture to the airflow and reduce irritation to the nasal passages.

Air flows from the CPAP through a short hose to the humidifier chamber where the air "passes over" the water to pick up whatever moisture it can. The air then flows into the six foot hose to the mask.

Passover humidifiers may provide sufficient moisture with CPAPs set at lower-end pressures. However, if the moisture is not sufficient there is no way to increase the amount of moisture added. The water is room temperature. In cold climates, the water temperature will drop causing the CPAP air to become very cold, and causing the amount of moisture to be reduced.
What is an integrated humidifier?
An integrated humidifier is used with a specific CPAP and fits directly onto the machine. For most heated humidifiers, this design eliminates the need for a second hose as well as a second power cord.

An advantage of an integrated humidifier is that it works very closely with the CPAP machine to deliver humidification. Also, an integrated humidifier is a compact unit that uses fewer parts to provide moisture to the user.

A disadvantage of the integrated humidifier is the user will receive less moisture when it is used with a passover humidifier. The smaller surface area effects the amount of moisture produced. Also, a integrated humidifier will only function with the CPAP for which it was designed.

You can see if your machine has an integrated humidifier option by reviewing our Compare Charts.

An example of an integrated humidifier is the PR System One Heated Humidifier as seen below attached to a machine in the PR System One line. PR System One Heated Humidifier

Here are some of the integrated humidifiers we carry:

DreamStation Heated Humidifier
Transcend Heated Humidifier
IntelliPAP 2 Heated Humidifier with Pulse Dose Humidification
PR System One 60 Series Heated Tube Humidifier with Heated Tube
What is a built in humidifier?
A "built in" humidifier is designed as a part of the CPAP machine and cannot be removed or separated from the CPAP machine. As with an integrated humidifier, the design eliminates the need for a second hose or power cord. The water chamber can be removed for cleaning or replacement purposes.

The advantage of a "built-in" humidifier is its compact shape, which operates on fewer parts. This integrated design helps to ensure optimum moisturized comfort and effectiveness when CPAP therapy and humidification are used together. Also, it allows an option for the humidification to be turned off while the CPAP is blowing.

A disadvantage is that a built in humidifier may produce less moisture if used as passover because the surface area is typically smaller. Also, since the humidifier is "built in" to the machine, detaching it is not an option. This can be an issue for frequent travelers. Lastly, if the machine or humidifier stops working, the entire unit must be sent in for repair or replacement, not just the component that failed.

An example of a machine with a built in humidifier is the ICON Auto CPAP Machine with Built In Heated Humidifier and SensAwake as seen below. ICON Auto CPAP Machine with Built In Heated Humidifier and SensAwake
Here are some other machines we carry with built-in humidifiers:

AirSense™ 10 CPAP Machine with HumidAir™ Heated Humidifier
AirSense™ 10 AutoSet CPAP Machine with HumidAir™ Heated Humidifier
iCH Auto CPAP Machine with PVA and Built-In Heated Humidifier
+ See More
What is a stand alone humidifier?
A stand alone humidifier is a component that will work with any CPAP and does not attach directly to the machine. It has its own power cord and a short hose to connect it to the CPAP. Generally it will sit next to the CPAP machine and is slightly larger than an integrated humidifier.

The advantage of a stand alone humidifier is the fact that it may be used with any CPAP machine.

The main disadvantages are that the size is often larger than either a "built in" or integrated humidifier and that a short hose is needed to connect it to the CPAP machine.

An example of a stand alone humidifier is the Fisher & Paykel HC150 Heated Humidifier as seen below. HC150 Heated Humidifier
How do I care for my humidifier?

To care for your humidifier simply empty and clean the water tank each morning. Only distilled water should be used in the humidifier to avoid mineral deposit build up. S9 Dishwasher Safe Humidifier Chamber

Here are some items that can help with caring for your humidifier:


CleanSmart CPAP Disinfectant Spray

Control III Disinfectant CPAP Cleaning Solution - 16 oz Concentrate

Control III Disinfectant CPAP Cleaning Solution - Home Care Kit

Hurricane CPAP Equipment Dryer

What does a humidifier prescription need to say?
A humidifier prescription must contain all of the following information:
  • One of the following words or phrases: "CPAP Humidifier", "Humidifier", "HH", "CPAP Supplies", "CPAP Mask", "CPAP", "Continuous Positive Airway Pressure", "APAP", "AutoPAP", "AutoSet", "Auto CPAP", "Auto Adjusting CPAP", "Self Adjusting CPAP", "BiPAP", "BiLevel", "VPAP", "BiPAP Auto", "BiPAP ST", "Synchrony ST", "VPAP ST"
  • Your physician's contact information
  • Your physician's signature
  • The patient's full name

Here are some of our top selling humidifiers:

PR System One 60 Series Heated Tube Humidifier with Heated Tube
Transcend Heated Humidifier
XT Heated Humidifier
+ See More

CPAP.com 100% Price Protection Guarantee

When you shop with us, we want you to be confident that you are receiving the best available price. If this items goes on sale or you spot an online or retail competitor with a lower price within seven days of your purchase, let us know, and we will credit you the difference.

"Super helpful, fast shipping, friendly assistance, great selection, I love this company."

- Verified Customer, 10/25/22

★★★★★

(147)  

Read Reviews

Need a personal touch?

Icon for Chat with CPAP

Chat with CPAP

Questions about a product or an existing order? Start a chat and let us help you out.

Start a chat

Icon for Call us

Call us

M-F 8am-8pm
Sat 8am-5pm (CST)

1.800.356.5221

Customer Reviews

See what other customers are saying.

Overall Rating
★★★★★
4.8 147 Reviews
5  Stars 
124
4  Stars 
15
3  Stars 
4
2  Stars 
2
1  Stars 
2
Sort By
★★★★★

Great product

Verified purchase | May. 08, 2021 | Verified CPAP.com Customer
We were pleased with the product and the speed of the delivery.
Was this helpful?
(0)
(0)
★★★★★

Easier than descaling

Verified purchase | Oct. 28, 2020 | Verified CPAP.com Customer
Got this replacement/upgrade version of the reservoir to replace my old one that has gotten cruddy. Even though the base is a different shape (oval vs round) it fit fine in the unit and is held solidly in place by the frame that comes in the kit.
Was this helpful?
(0)
(0)
★★★★★

Perfect!

Verified purchase | Sep. 16, 2020 | Verified CPAP.com Customer
After weeks of trying to fix a leaking water chamber and no luck getting the right one through the firm that handles my supplies, I got this one (water chamber plus cover) from CPAP.com. It took a few seconds (literally) to install the new cover, everything fits perfectly, and I don't have to clean up any more leaks. Fantastic!
Was this helpful?
(0)
(0)
★★★★★

Mitch

Verified purchase | Jul. 30, 2020 | Verified CPAP.com Customer
Great price fast shipping.
Was this helpful?
(0)
(0)
★★★★★

Prefect

Verified purchase | Apr. 09, 2019 | Verified CPAP.com Customer
Great product and price. Quick shipping no problems at all . would refer to family or friend and would order from cpap again. Thanks
Was this helpful?
(0)
(0)
★★★★★

CPAP heater 3i upgrade

Verified purchase | Mar. 09, 2019 | Verified CPAP.com Customer
Clipped on easily works great
Was this helpful?
(0)
(0)

Customers Also Viewed

Product image for H4i™ Heated Humidifier Top Cover Lid and Seal
★★★★★
$13.95

H4i™ Heated Humidifier Top Cover Lid and Seal

Product image for Water Chamber for H4i™ Heated Humidifier
★★★★★
$16.99 $22.50

Water Chamber for H4i™ Heated Humidifier

Product image for Tub Plate Seal for H4i™ Water Chamber
★★★★★
$5.95

Tub Plate Seal for H4i™ Water Chamber

Product image for Dishwasher Safe Water Chamber for H4i™ Heated Humidifier
★★★★★
$38.40

Dishwasher Safe Water Chamber for H4i™ Heated Humidifier

Product image for HumidAire H4i™ Heated Humidifier
★★★★★
$232.00

HumidAire H4i™ Heated Humidifier

Product image for S9™ Series H5i™ Heated Humidifier with Climate Control
★★★★★
$165.00

S9™ Series H5i™ Heated Humidifier with Climate Control

Product image for Flip Lid Seal for S9™ Series H5i™ Heated Humidifier
★★★★★
$7.95

Flip Lid Seal for S9™ Series H5i™ Heated Humidifier

Product image for HC325 Replacement Water Chamber for HC100/150 Humidifiers
★★★★★
$14.25

HC325 Replacement Water Chamber for HC100/150 Humidifiers

Product image for Standard Water Chamber for AirSense™ 10, AirStart™ 10, and AirCurve™ 10 Humidair™ Heated Humidifier
★★★★★
$29.00

Standard Water Chamber for AirSense™ 10, AirStart™ 10, and AirCurve™ 10 Humidair™ Heated Humidifier

Product image for IntelliPAP 2 Standard Heated Humidifier
★★★★★
$148.00

IntelliPAP 2 Standard Heated Humidifier

Product image for HC150 Heated Humidifier With Hose, 2 Chambers and Stand
★★★★★
$240.00

HC150 Heated Humidifier With Hose, 2 Chambers and Stand