HiLIFE 3L Cool Mist
HiLIFE: 30 Hours of Quiet, Clean Air
The 3L ultrasonic cool mist humidifier that runs whisper-quiet under 30dB all night long. Top-fill design, auto shut-off, and up to 30 hours of continuous mist per fill. Your bedroom and nursery deserve this.
4.4 Stars · 37,000+ Amazon Reviews
Why the HiLIFE Humidifier Stands Out
Under 30dB Quiet
Sleep through the night without a sound. HiLIFE's ultrasonic technology keeps noise below 30dB—quieter than a whisper in your bedroom or nursery.
30-Hour Runtime
Fill the 3L tank once and forget about it. One fill covers a full day and night of continuous cool mist—no 3AM refill trips.
Auto Shut-Off Safety
Runs dry? It turns itself off automatically. The built-in sensor protects the unit and gives you worry-free operation, even in a baby's nursery.
Ready in Under 60 Seconds
The HiLife Humidifier works right out of the box — no filters, no fuss, no instruction manual needed.
Fill From the Top
Pop off the lid and fill the 3L tank directly from your faucet. No flipping the unit upside down, no unscrewing caps. Top-fill design means you can refill without even moving it off your nightstand.
Set Your Mist Level
Turn the dial to choose your mist output. Low for a light refresh in small rooms, high for full coverage in living areas up to 430 sq ft. The ultrasonic cool mist technology disperses evenly without any heat.
Let It Run All Night
With up to 30 hours of continuous mist on a single fill, you'll sleep through the night without refilling. Operating under 30dB — quieter than a whisper — you won't hear it working.
Auto Shut-Off Safety
When the tank runs dry, the HiLife Humidifier shuts itself off automatically. No overheating, no damage, no worrying if you forgot to check the water level before leaving the house.
HiLIFE Humidifier Collection
Three ultrasonic cool mist humidifiers built for quiet bedrooms, nurseries, and living spaces. Up to 30 hours of fresh air from a single fill.
Whisper-Quiet Humidifier
Check PriceHiLIFE Top-fill 3L ultrasonic humidifier with auto shut-off. Runs quietly for 30 hours.
- Easy top-fill, simple to clean
- 30 hours on a single fill
- Auto shut-off for safe use
- Custom mist levels for comfort
Ultimate Comfort Model
Check PriceHiLIFE Cool mist technology keeps your room fresh and comfortable with zero disruption.
- Hassle-free top-fill refills
- Under 30dB for peaceful sleep
- Lasts up to 30 hours per fill
- Auto shut-off, worry-free use
Oasis Humidifier
Check PriceHiLIFE Smart humidity settings adjust mist automatically for the perfect room balance.
- 3L tank for all-day moisture
- Under 30dB whisper-quiet motor
- Smart humidity auto-adjusts
- Easy top-fill, easy to clean
HiLife Humidifier Specs
Everything you need to know before you buy, all in one place.
| Mist Type | Ultrasonic Cool Mist |
| Tank Capacity | 3 Liters (0.8 gallons) |
| Runtime | Up to 30 hours on low setting |
| Noise Level | Under 30dB (whisper-quiet) |
| Fill Design | Top-fill with wide opening |
| Room Coverage | Up to 430 sq ft |
| Safety Features | Automatic shut-off when tank is empty |
| Mist Control | Adjustable output dial with multiple levels |
| Humidity Sensor | Smart humidity setting for optimal comfort |
| Cleaning | Wide-mouth opening for easy interior access |
| Filter Required | No — filterless design, no replacement costs |
| Power | Standard AC outlet, energy-efficient operation |
Fresh Air, Quiet Nights. That's the HiLIFE Promise.
HiLIFE builds humidifiers that disappear into your routine. No fuss, no noise—just clean, comfortable air every single night.
Every model uses ultrasonic cool mist technology with a 3L tank. You get consistent moisture output and auto shut-off protection built in.
Got questions? HiLIFE's support team responds fast. Your humidifier's backed by a satisfaction guarantee, so there's zero risk trying one.
Stop Waking Up With a Dry Throat
The HiLife Humidifier runs 30 hours on one fill, operates under 30dB, and shuts off automatically. Your best night's sleep starts tonight.
Get Your HiLife Humidifier →Why Pick the HiLife Humidifier?
You've got options. Here's why thousands of people chose this one — and kept it on their nightstand.
Truly Whisper-Quiet
At under 30dB, this is quieter than your refrigerator humming in the next room. Light sleepers, parents with newborns, and anyone who's ever been kept awake by a noisy humidifier — you'll finally forget it's even on.
30 Hours, One Fill
Most humidifiers need refilling every 8-12 hours. The HiLife 3L tank runs up to 30 hours on a single fill. That's a full day plus an overnight session before you even think about adding water.
Top-Fill, Easy-Clean
No more wrestling with upside-down tanks or reaching into narrow openings with a bottle brush. Pop the lid, fill from any faucet, and wipe clean through the wide-mouth opening. Maintenance takes two minutes, not twenty.
Set It and Forget It
The smart humidity sensor reads your room and adjusts mist output automatically. Combined with auto shut-off when the water runs out, you can leave the house or fall asleep without a second thought about safety.
No Filters to Replace
Some humidifiers cost $15 just to breathe — not this one. The filterless ultrasonic design means zero ongoing costs. No hunting for replacement parts, no subscriptions, no surprise expenses three months after purchase.
Cool Mist, Zero Risk
Unlike warm mist humidifiers that boil water, the HiLife uses ultrasonic cool mist technology. There's no hot steam, no burn risk around kids or pets, and no spike in your energy bill from heating elements running all night.
Get the Most From Your HiLife Humidifier
Follow this simple progression to find your ideal humidity settings and keep your humidifier running perfectly for years.
Unbox & First Fill
- Rinse the tank with cool water
- Fill to the max line from the top
- Place on a flat, elevated surface
- Start on medium mist to test output
Dial In Your Settings
- Try different mist levels overnight
- Use smart humidity mode for auto-adjust
- Position 3 feet from your bed or crib
- Note how long each fill lasts for you
Optimize Placement
- Test in different rooms for coverage
- Adjust output based on room size
- Move closer to dry-air problem areas
- Set a weekly cleaning reminder
Maintenance Routine
- Deep clean tank with white vinegar
- Wipe the mist nozzle with a soft cloth
- Check base for mineral buildup
- Use distilled water to reduce deposits
Key Benefits & Use Cases
Discover all the ways this product can work for you.
Bedroom Comfort
Run on low all night for 30 hours of moisture. Under 30dB means you won't hear it — just wake up without a dry throat or cracked lips.
Baby Nursery
Safe cool mist with auto shut-off gives you peace of mind. No hot steam risk, and the quiet operation won't disturb naps or bedtime routines.
Allergy & Sinus Relief
Consistent humidity between 40-60% helps reduce airborne irritants. The cool mist soothes dry nasal passages and eases nighttime congestion.
Home Office
Dry office air causes fatigue and headaches. Place the HiLife 3L Humidifier on your desk — it's quiet enough for conference calls and runs all workday.
Living Room Coverage
At 430 sq ft coverage, one unit handles most living rooms. Set it on high during winter months when heating systems drain moisture from the air.
Plant Care
Tropical houseplants thrive in 50-60% humidity. Position the humidifier near your plant collection and watch brown leaf tips disappear within weeks.
What HiLIFE Owners Are Saying
"My baby sleeps through the night now. This thing runs so quietly I forget it's on. Best nursery purchase I've made."
"I fill it before bed and it's still going when I wake up. No more dry throat mornings. The top-fill design is genius."
"Solid humidifier for the price. Quiet enough for my home office and the auto shut-off gives me peace of mind overnight."
How HiLIFE Stacks Up
See why thousands pick HiLIFE over the competition
| Feature | HiLIFE Humidifier | Typical Product |
|---|---|---|
| Tank Capacity | ✓ 3L Full Size | 1.5–2L Average |
| Runtime | ✓ Up to 30 Hours | 10–15 Hours |
| Noise Level | ✓ Under 30dB | 35–45dB |
| Refill Design | ✓ Easy Top Fill | Bottom Fill |
| Auto Shut-Off | ✓ Yes, Built-In | Some Models Only |
| Cleaning | ✓ Wide-Mouth Easy | Hard to Reach |
Common Questions
How long does the HiLIFE 3L humidifier run on a single fill?
The HiLIFE 3L humidifier runs up to 30 hours on one full tank. At a lower mist setting, you can easily get through the night and most of the next day without refilling. It's one of the longest runtimes you'll find in this size class.
Is the HiLIFE ultrasonic humidifier quiet enough for a nursery?
Absolutely. The HiLIFE ultrasonic cool mist humidifier operates under 30dB — that's quieter than a whisper. Parents use it in baby nurseries without any sleep disruption. You'll barely notice it's running.
What room size does the HiLIFE humidifier cover?
The 3L tank and ultrasonic mist output make it ideal for bedrooms, nurseries, and small offices up to roughly 250 square feet. For larger open spaces, you might want two units placed at opposite ends.
Does the HiLIFE humidifier have an auto shut-off feature?
Yes. The built-in auto shut-off kicks in when the water level drops too low. You can fall asleep or leave the house without worrying about it running dry. It's a standard safety feature across all HiLIFE humidifier models.
How do you clean and maintain the HiLIFE humidifier?
HiLIFE designed this humidifier with a wide-mouth opening, so you can reach inside the tank easily. Rinse it with white vinegar and water once a week, wipe the base, and you're done. No special tools or brushes needed — the whole process takes about five minutes.
How do you refill the HiLIFE humidifier?
It uses a top-fill design, so you just pop the lid off and pour water directly in. No need to flip the tank upside down or detach anything. You can refill it right where it sits — even from a water bottle in a pinch.
Can I adjust the mist output on the HiLIFE humidifier?
Yes. The HiLIFE humidifier has customizable mist levels so you can dial it up on dry winter nights or keep it low for mild days. The Oasis model also includes a smart humidity setting that adjusts mist output automatically for optimal comfort.
Does the HiLIFE humidifier use a lot of electricity?
Not at all. Ultrasonic cool mist technology is inherently energy-efficient — there's no heating element boiling water. The HiLIFE humidifier draws minimal power, so running it 24/7 won't make a noticeable dent in your electric bill.