| Management number | 230322040 | Release Date | 2026/06/18 | List Price | $20.00 | Model Number | 230322040 | ||
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<h4><strong>Breathe Deep, Sleep Deeper: The 4L Humidifier That Does It All</strong></h4> <p>Tired of dry air ruining your sleep and skin? Meet your all-in-one wellness upgrade. Our 4L Ultrasonic Humidifiers instantly adds moisture to dry air in large rooms (up to 538 sq ft), while doubling as a calming essential oil diffuser and soft-glow night light. It’s the effortless solution for restful sleep, easier breathing, and a perfectly balanced home—set your comfort and forget it.</p> <p> </p> <p>🕐 36-Hour Marathon Runtime: 4L tank runs for a day and a half on low, so you sleep through the night without refills.</p> <p>🤖 Set It & Forget It Smart Control: Digital display lets you set your exact humidity (40%-90%). It auto-adjusts to maintain it, no guessing needed.</p> <p>🌿 3-in-1 Wellness Powerhouse: Humidify dry air, diffuse soothing essential oils (like lavender for sleep), and choose from 7 calming night light colors—all in one sleek device.</p> <p>🤫 Library-Quiet & Effortless: Runs below 28dB (quieter than a whisper) with a super easy top-fill design. Just pour water in—no messy disassembly.</p> <p> </p> <ul class="ybc-ul-component"> <li class="ybc-li-component ybc-li-component_ul"> <p><strong>For Your Best Sleep Ever:</strong> The optional night light and whisper-quiet operation create the perfect nursery or bedroom oasis. Relieves dry cough, congested sinuses, and cracked skin by morning.</p> </li> <li class="ybc-li-component ybc-li-component_ul"> <p><strong>For Focus & Comfort at Work:</strong> Keep your home office or living room air optimally humid. Reduces static shock, protects wood floors/furniture, and helps you stay focused.</p> </li> <li class="ybc-li-component ybc-li-component_ul"> <p><strong>For Your Self-Care Moments:</strong> Add a few drops of eucalyptus when you’re stuffy, or lavender for stress relief. </p> </li> </ul> <p> </p> <p> </p>
| Humidification method | Ultrasonic |
|---|---|
| Coverage area | 538 sq ft |
| Run time | 36 h |
| Volume capacity | 1.1 gal |
| Dispensing temperature | Cool Mist |
| Features | Adjustable Humidistat, Automatic Moisture Control, Automatic Shut-Off, Empty Tank Indicator, Oil Diffuser, Timer, Variable Speed, Water Level Indicator |
| Brand | AIRFIRE |
| Decibel rating | 28 dB |
| Humidifier type | Humidifier |
| Power type | Corded Electric |
| Color | White |
| Rec. use | Commercial, Residential |
| Speeds | 3 |
| Dimensions | 7.72 x 7.72 x 10.16 in |
| Weight | 2.2 lb |
| Has nrtl listing certification | N |
| Model | YH-921 |
| Volts | 120 V |
| Count per pack | 2 |
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