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HumidAire H4i Heated Humidifier Overview
Engineered to deliver 30% more heated humidification than previous models, the HumidAir H4i Heated Humidifier provides relief from congestion, dry mouth, and nasal irritation related to CPAP therapy.
Learn More About the HumidAir H4i Heated Humidifier:
- Offers Increased Water Capacity and Seamless Integration to CPAP Machine
- Delivers 30% More Heated Humidification Than Previous Versions
- Helps Relieve Congestion and Dry Mouth
This integrated unit is for use with the ResMed S8 and S8 II series CPAP machines only. No extra power supply is required for use.
Features
Important Tips
Replacement Parts
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Customer Reviews
Offers Increased Water Capacity and Seamless Integration to CPAP Machine
Benefits of the latest model of this integrated humidification system, which can make sleep therapy more comfortable, include:
- Increased water capacity: Offers efficient humidification with volume up to 390ml of water
- Flip-top lid design: No need to remove the tubing to access the water chamber, simply lift the lid and fill
- Seamless integration: This unit easily snaps onto your CPAP machine anytime it’s needed
- Simple dial control: Easy to use in the dark, the device also offers a quick response time
- Small design: Unobtrusive on your nightstand and easy to pack for travel.
What’s Included:
- Humidifier
- Chamber
Electromagnetic Compatibility: Product complies with all applicable electromagnetic compatibility requirements (EMC) according to IEC60601-1-2, for residential commercial and light industry environments.
*Consult the medical department of the carrier before using on aircraft.
This humidifier cannot be run off of 12 volt DC power. If a machine is powered by 12 volts, the heated humidifier will not run. A 110 volt pure sine inverter hooked to a 12 volt battery can be used to power an S8 CPAP and this humidifier.
This humidifier integrates with the full line of ResMed S8 and S8II Series CPAP/APAP/VPAP Machines. The H4i Heated Humidifier is not compatible with:
- AutoSet CS 2
- S7 AutoSet Spirit
- S7 Series
- VPAP III Series
- VPAP Malibu
VPAP III Series is not an S8 model and will only work with the HumidAire 2i Heated Humidifier.
The S8 AutoSet II and Elite II are compatible with this product, but the CPAP machines were manufactured BEFORE the H4i was manufactured. When setting either machine, please note that H3i will appear on the display.
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.
Nasal congestion also leads to mouth breathing, which perpetuates the problem of dryness. If this is an issue for you, try a heated humidifier.
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:
- Stand Alone Humidifiers
Stand Alone Humidifiers can be used with almost any machine as long as an integrated humidifier is not being used and the machine does NOT have a built in humidifier. The Fisher & Paykel HC150 Heated Humidifier With Hose, 2 Chambers and Stand is a stand alone heated humidifier that includes ambient tracking to keep the humidity consistent independent of room temperature.
- Integrated Humidifiers
Integrated Humidifiers connect directly to the machine the humidifier was made to be used with. This provides the convenience of being able to remove the humidifier from the machine for traveling or other purposes. Here are some of the integrated humidifiers we carry:
PR System One 60 Series Heated Tube Humidifier with Heated Tube
Transcend Heated Humidifier
XT Heated Humidifier
- Built In Humidifiers
Built In Humidifiers are permanently affixed to their machine and cannot be removed. The chamber can still be removed for cleaning, however the heating element is a part of the machine. The advantage of built in humidifiers is they generally take up less space than a machine with an integrated or stand alone humidifier. Here are some machines that have a built in humidifier:
AirSense™ 10 AutoSet CPAP Machine with HumidAir™ Heated Humidifier
ICON Auto CPAP Machine with Built-In Heated Humidifier and ThermoSmart Heated Hose
iCH Auto CPAP Machine with PVA and Built-In Heated Humidifier
+ See More
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.
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.
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
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.
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
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.
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. 
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
- 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
The image below from Fisher & Paykel explains how rainout is formed. Warm, moist air leaves the heated humidifier and travels through the CPAP tube. As air flows through the tube, the temperature of the room causes the tube to cool. As the tube cools, the air inside releases its moisture, and creates condensation in the hose.
Solutions to rainout include:
- Raise the temperature of your bedroom.
- Keep your CPAP machine at the same level as your bed.
- Insulate your tubing with a hose cover like Snugglehose.
- Reduce the temperature setting on your heated humidifier.
- Purchase a CPAP machine with a rainout reduction comfort feature.
- Some machine systems offer a compatible heated CPAP hose which maintains the temperature from the machine all the way to the mask, reducing the occurrence of rainout. The list of available heated hoses can be found here: Hoses With Heating Coils.
- If your machines uses a standard hose, consider the Hybernite Heated Rainout Control System.
The whole process of ordering from CPAP.com was very smooth. Everything was also completed very quickly and I had my... order in 3 days. Will order from them again when the need arises more...
Lots of condensation in the hose. Had to keep unit on the floor. Liked my dreamstation better.
The H4i replaced the H3i perfectly. My Resmed S8 elite didn't know the difference, but my nose did. Warm air... with the perfect humidity made it happy all night long. more...
Easy to use, snaps right onto the front of the CPAP, with power and air passing through (no other connections).... Compact. Reasonably easy to fill. I only use mine when I've got a cold, since I don't really need the humidification all the time and filling it is something of a hassle. But you'll love having this when you're sick, or if you like a humidifier every day. more...
Don't know why old one just stopped working but the new unit works just fine!
Excellent product and very easy to setup and use.
The HunidAire H4i was all that I expected and more. It arrived in a nice neat, well protected package.... When I opened it up I was like I should have ordered this before my old humidifier quit working. When I used it that night I was convinced that I should have ordered it long time ago The best thing about the humidifier is the design. It is easy to fill, seems to fit better and is easy to clean. more...
works great with no problems! replaced the H3i on a resmed compact
It does extend the capacity of the Res Med machine and it also provides additional humidity, on demand. In some... cases, more than expected. Overall it allows you to run your humidifier level lower and get more humidity than the base model that comes standard on the Res Med. The water level mark could be more clearly identified. more...
Excellent humidifier. Keeps you from drying out with CPAP use. It is quiet as well. CPAP.com was very helpful and... sent the item quickly. Thank you. more...
This new model is much improved over older model. Sound is much less and moistures levels are higher and... more consistent more...
Really poorly designed, thin plastic, does not open in half like the the humidifier on my Autoset Spirit. Do not... like new designs of Resmed's machines. Would of bought another Autoset Spirit but they discontinued machine. more...
