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A humidifier can be useful when dry indoor air makes a bedroom, office, or living space uncomfortable, but tank size, cleaning effort, and nighttime noise can make one model much easier to live with than another. The Rexoon HU100 Humidifier combines a 4.6-liter stainless steel water tank with top filling, three mist speeds, two spray modes, and a listed runtime of up to 30 hours. Its strongest points are the easy-clean tank, quiet 26dB listed operation, and coverage rating of up to 500 square feet. The main tradeoff is that the available product information does not show automatic target-humidity control, so you adjust output manually.
Quick Verdict
Rating: 8/10, Recommended with caveats
Best For: Bedrooms, home offices, living areas, and buyers who prioritize a stainless steel tank and easy cleaning.
Bottom Line: The Rexoon HU100 offers a useful combination of a 4.6L tank, quiet operation, adjustable mist, and a detachable stainless steel reservoir. It is less suitable if you specifically want a humidifier that automatically maintains a selected humidity percentage.
Rexoon HU100 Key Specifications
| Specification | Detail |
|---|---|
| Brand | Rexoon |
| Model | HU100 |
| Product type | Ultrasonic cool mist humidifier |
| Tank capacity | 4.6 liters / about 1.2 gallons |
| Listed coverage | Up to 500 sq ft |
| Maximum listed runtime | Up to 30 hours |
| Mist controls | 3 speed levels and 2 spray modes |
| Listed noise level | 26dB |
| Timer | 2 to 8 hours |
| Night light | 7-color ambient light, adjustable or off |
| Tank material | Stainless steel |
| Top section | ABS plastic |
| Dimensions | 10.63D × 6.69W × 6.69H inches |
| Weight | About 2.65 lb |
| Power | 25W AC |
| Listed input range | 110–240V |
| Included components | Humidifier main unit, power adapter, and user manual |
| Best use | Bedrooms, living rooms, offices, nurseries, and indoor plant areas |
What Is the Rexoon HU100 Humidifier?
The Rexoon HU100 is a compact ultrasonic cool mist humidifier designed around a 4.6L detachable stainless steel tank. Instead of relying on a narrow tank opening, its top-fill layout gives you wider access for adding water and cleaning the reservoir.
Its controls provide three mist speeds, two spray modes, a 2 to 8-hour timer, and a 7-color ambient light. The product is rated for spaces up to 500 square feet, although actual humidity performance will depend on room size, ventilation, starting humidity, and the mist setting you choose.
The HU100 is most appealing if cleaning convenience matters to you. The stainless steel reservoir has a smooth surface and detachable construction, and available product information describes the tank as suitable for hand washing or dishwasher cleaning.
Who Should Buy It?
Best For
- You want a large 4.6L tank without a bulky floor humidifier.
- You value a stainless steel reservoir and wide access for cleaning.
- You need quiet operation for a bedroom, nursery, or home office.
Skip If
- You want a built-in humidistat that automatically targets a chosen humidity percentage.
- You specifically need confirmed smart-home or app controls.
- You need a clearly documented long-term manufacturer warranty before buying.
Before You Buy: The HU100 gives you adjustable mist levels, but the available specifications do not show automatic target-humidity control. If you want the humidifier to maintain an exact percentage by itself, compare models with a built-in humidistat.
Design and Build Quality
The main design advantage is the stainless steel water tank. Stainless steel provides a hard, smooth reservoir surface, and the HU100’s detachable construction gives you better access than many narrow-neck plastic tanks.
The upper housing uses ABS plastic, which helps keep the complete unit relatively light. At about 2.65 pounds and roughly 10.63 inches deep by 6.69 inches wide by 6.69 inches high, you can move it between a bedroom, desk area, or living room without much effort.
The top-fill design also means you do not have to turn a full water tank upside down during routine refilling. That is a practical benefit when you use the humidifier every day.
Mist Output and Room Coverage
The HU100 provides low, medium, and high mist settings plus two spray modes. That gives you more control than a basic one-speed humidifier and lets you reduce output in a smaller bedroom or increase it when the air feels especially dry.
Rexoon lists coverage of up to 500 square feet. Treat that figure as a maximum product rating rather than a guarantee for every room. Open doors, heating systems, ventilation, room temperature, and starting humidity can all change how quickly moisture builds in the air.
The 4.6L tank is rated for up to 30 hours of operation. Maximum runtime usually represents lighter output conditions, so expect shorter intervals between refills when you run stronger mist settings for long periods.
Noise Level and Nighttime Use
Noise is one of the HU100’s stronger bedroom features. Its listed operating level is 26dB, which is low enough to make it a better candidate for sleep spaces than humidifiers with loud fans or obvious mechanical cycling.
The 7-color ambient light can add a soft glow at night, and the light can be adjusted or turned off when you prefer a darker room. The 2 to 8-hour timer also lets you choose a limited operating period instead of leaving the unit running indefinitely.
Top-Fill Design and Cleaning
A humidifier is only convenient if you can keep the water-contact areas clean. The HU100’s wide-opening stainless steel tank and detachable design reduce the number of awkward corners you need to reach during routine maintenance.
The tank is described as dishwasher safe, although you should follow the HU100 manual for which individual pieces can safely go in a dishwasher. Keep powered electrical components out of water and unplug the humidifier before cleaning.
Pro Tip: Do not wait until visible residue develops before cleaning the tank. Empty old water, rinse the reservoir regularly, and follow the manual’s cleaning instructions so buildup does not become harder to remove.
Controls and Everyday Convenience
The HU100 uses straightforward touch or push-button controls rather than depending on an app. You can adjust mist speed, select the spray mode, use the timer, and manage the ambient light directly on the humidifier.
Its listed 110–240V input compatibility is useful from an electrical-design standpoint, although plug shapes and local electrical requirements can differ by country. Always use the supplied or manufacturer-approved adapter and confirm local compatibility before using the appliance outside its intended market.
Humidity, Comfort, and Safe Expectations
Adding moisture can make an overly dry room feel more comfortable, especially when heating or air conditioning leaves indoor air dry. The HU100 gives you adjustable output so you can add moisture gradually rather than simply running maximum mist all the time.
A humidifier is not a medical treatment. If you are using one because of persistent breathing, allergy, sinus, or other health concerns, follow appropriate medical guidance rather than relying on a humidifier to address the underlying problem.
It is also worth monitoring the room rather than assuming more humidity is always better. If you need precise humidity readings, use a separate hygrometer because the available HU100 specifications do not show a built-in display that reports the room’s exact relative humidity.
How It Performs in Real Use
For Bedroom Use
The combination of a 26dB listed noise level, adjustable mist, timer, and switchable night light makes the HU100 well suited to a bedroom. The 4.6L tank also reduces the need for constant refilling compared with small desktop humidifiers.
For a Nursery
The quiet operation and cool mist design are useful characteristics for a nursery. Place the humidifier on a stable surface where a child cannot pull the unit, adapter, or cord down, and follow the manufacturer instructions for clearance and placement.
For a Home Office or Living Room
The listed 500 sq ft coverage gives the HU100 enough capacity for more than a small bedside area. In an open or frequently ventilated room, you may need a higher mist setting because moisture can disperse more quickly.
For Indoor Plants
The adjustable mist settings can also make the HU100 useful near plants that prefer more humid air. Keep the mist from continuously soaking leaves, walls, furniture, electronics, or nearby surfaces, and adjust placement if condensation begins forming.
Setup and Placement Tips
- Use a stable, water-resistant surface: Keep the unit upright and away from an edge where it could be knocked over.
- Leave room for mist to disperse: Avoid aiming continuous mist directly at walls, electronics, bedding, or wood furniture.
- Start with moderate output: Increase the mist only if the room remains too dry.
- Watch for condensation: Visible moisture collecting on nearby surfaces is a sign to lower output or move the unit.
- Follow the manual: Use the manufacturer’s instructions for filling, cleaning, approved water, and electrical setup.
Materials and Safety Notes
The HU100 uses a stainless steel water tank with an ABS plastic upper section. The reservoir is designed to detach for easier cleaning, which is particularly useful because standing water and residue should not be allowed to build up inside a humidifier.
The available product information does not advertise the HU100 as an essential-oil diffuser. Do not add essential oils, fragrances, medications, or other liquids to the tank unless the user manual specifically confirms that they are supported.
Keep the power adapter and electrical parts dry. If the humidifier is used around children or pets, position the unit and cord where they cannot be pulled, chewed, tipped, or played with.
Pros and Cons
Pros
- Large 4.6L tank with up to 30 hours of listed runtime.
- Stainless steel detachable tank provides wide access for cleaning.
- Top-fill design makes routine refilling easier.
- Three mist speeds and two spray modes provide useful output control.
- 26dB listed noise level, timer, and switchable night light suit nighttime use.
Cons
- No built-in automatic target-humidity control is shown in the verified specifications.
- No app or smart-home controls are listed.
- A specific manufacturer warranty period could not be confirmed from the available product information.
What Buyer Feedback Highlights
Available buyer feedback and retailer summaries commonly focus on the HU100’s easy-clean tank, quiet operation, top-fill convenience, and long runtime. These are also the features that make the strongest practical difference during everyday use.
There are also reports elsewhere in the market of reliability varying between individual units, so it is sensible to inspect the current seller, return terms, and warranty information before purchasing. Because ratings and review counts can change, they are not used as a fixed score in this review.
How to Maintain the Rexoon HU100
Regular cleaning matters more than adding accessories or following an arbitrary filter-replacement schedule. The product information reviewed for the HU100 does not establish a replaceable filter that must be changed every two or three months, so you should follow the supplied manual rather than buying replacement parts based on a generic humidifier schedule.
Empty stale water when the unit will not be used, rinse the water-contact surfaces, and clean residue before it becomes difficult to remove. When storing the humidifier, make sure the tank and removable parts are dry.
Is It Worth the Price?
The Rexoon HU100 makes the most sense for buyers who value tank material and cleaning convenience as much as humidification capacity. Its stainless steel reservoir, 4.6L volume, top filling, multiple mist settings, timer, and low listed noise give it a stronger feature set than a basic plastic-tank humidifier with a single control dial.
Its value is less convincing if automatic humidity regulation is your highest priority. In that case, paying for a model with an integrated humidistat and humidity display may be more useful than choosing the HU100 for its stainless steel construction.
How It Compares to Alternatives
If easy cleaning is your top concern, the Carepod One is worth comparing because it uses a stainless steel design built around a small number of washable components. The RIMOO 4L Stainless Steel Humidifier is another option to compare if you specifically want a model marketed as filterless with a longer timer range.
If you prefer warm mist instead of ultrasonic cool mist, a stainless steel steam model such as the TURBRO GLS04 serves a different use case. The Rexoon HU100 remains a better match when you want cool mist, a 4.6L tank, quiet operation, and straightforward physical controls.
Frequently Asked Questions
How long can the Rexoon HU100 run on one tank?
The 4.6L tank is listed for up to 30 hours of operation. Actual runtime can be shorter when you use a stronger mist setting or operate the humidifier in conditions that require more output.
How large a room can the Rexoon HU100 cover?
The product is listed for spaces up to 500 square feet. Real performance depends on ventilation, room layout, temperature, starting humidity, and the mist level you select.
Does the Rexoon HU100 need replacement filters?
The verified product information reviewed for this article does not establish a routine replaceable-filter requirement. Follow the HU100 user manual for maintenance and replacement-part instructions rather than using a generic two or three-month filter schedule.
Can the stainless steel tank go in a dishwasher?
The HU100 is marketed with a dishwasher-safe, detachable stainless steel tank. Check the manual before washing individual components, and never place powered electrical parts in a dishwasher or immerse them in water.
Can I use essential oils in the Rexoon HU100?
The available HU100 specifications do not advertise an essential-oil function. Do not put oils or fragrances into the water tank unless the supplied manual specifically states that they are safe for this model.
Does the HU100 automatically maintain a selected humidity level?
The verified specification set shows three mist speeds and two spray modes, but it does not show an automatic target-humidity setting. You control the output manually, so a separate hygrometer can be useful when you want to track room humidity.
What warranty comes with the Rexoon HU100?
A specific manufacturer warranty period was not consistently documented in the product sources reviewed for this article. Check the current Amazon listing and seller terms before ordering if warranty coverage is important to your decision.
The Bottom Line
The Rexoon HU100 is worth considering when you want a quiet cool mist humidifier with a 4.6L stainless steel tank, easy top filling, adjustable mist, and less awkward cleaning. It is a weaker fit if you need automatic humidity control, smart features, or a clearly documented warranty before purchase.
For bedrooms, offices, and general home use, its combination of capacity, 26dB listed noise, and detachable tank earns a Recommended with caveats verdict.
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