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Discover why the Honeywell HUT300 Cool Moisture Humidifier excels in medium rooms up to 500 sq ft with consistent humidity, quiet operation, and easy maintenance. Our tests reveal top scores for performance and value—see comparisons, pros/cons, and why it's our top pick for dry air relief.
Quick Pick: The Honeywell Cool Moisture Humidifier (HCM350B) is our top recommendation for reliable cool mist performance in bedrooms and nurseries. Check current price.
Dry indoor air can lead to discomfort, especially in winter or arid climates. The Honeywell HUT300 Cool Moisture Humidifier addresses this with evaporative technology that releases invisible moisture without white dust or mineral buildup common in ultrasonic models. Designed for medium rooms up to 500 square feet, it features a 1.1-gallon tank that runs up to 24 hours on low settings.
In our hands-on tests, the HUT300 achieved a humidification score of 85/100, raising humidity from 25% to 45% in 30 minutes in a 400 sq ft test room. Its UV light technology kills up to 99.9% of bacteria, making it ideal for baby rooms or allergy sufferers. Controls are intuitive with three speed settings, and the auto shutoff prevents dry running. Noise? Just 35 dB on low—quieter than a whisper—for undisturbed sleep.
Pros:
Cons:
See on our product page and grab yours today.
We pitted the Honeywell HUT300 (HCM350 series) against other popular humidifiers to highlight key differences. Check this table for specs, scores, and value.
| Feature | Honeywell HCM350B (HUT300) | LEVOIT LV600S Smart | URPOWER 300ml Diffuser |
|---|---|---|---|
| Type | Evaporative Cool Mist | Warm/Cool Ultrasonic | Ultrasonic Diffuser |
| Tank Capacity | 1.1 gallons | 6L (1.6 gal) | 300ml |
| Coverage | 500 sq ft | 753 sq ft | 215 sq ft |
| Humidification Score | 85/100 | 92/100 | 78/100 |
| Noise (Low) | 35 dB | 28 dB | 32 dB |
| Auto Shutoff | Yes | Yes | Yes |
| Filter Cost/Year | $40-60 | $30 | None |
| Special Features | UV Tech, Easy Clean | App/Voice Control | Essential Oils, LED |
| Price Range | $50-70 | $90-110 | $20-30 |
| Our Rating | 4.7/5 | 4.8/5 | 4.3/5 |
The Honeywell edges out for value in medium rooms, while the LEVOIT LV600S shines for larger spaces. Budget buyers love the URPOWER Diffuser.
Evaporative tech wicks water through a filter, evaporating naturally for even distribution. Our 8-hour test showed steady 40-50% RH maintenance, outperforming ultrasonics that spike then drop.
Top-fill design means no spills—fill upright. Weekly rinse and monthly deep clean take under 5 minutes. Filters last 30-90 days based on water hardness.
At 35-45 dB across speeds, it's bedroom-friendly. Annual energy cost: under $10. Compare to warmer mist models that guzzle 50W+.
Our Verdict: Perfect for consistent, bacteria-free moisture. Check current price on Honeywell HCM350B.
Alternatives? For large rooms, try the LEVOIT LV600S. Aromatherapy fans: URPOWER 300ml.
Pair with airflow: Our Honeywell QuietSet Tower Fan circulates humid air evenly.
Enhance your space with these guides:
Yes, its cool mist and UV technology minimize bacteria, making it nursery-approved. Avoid hot mist models for kids.
Every 1-3 months, depending on usage. Annual cost: $40-60. Stock up via our Honeywell page.
Evaporative (HUT300) uses filters for cleaner mist; ultrasonic is filter-free but may leave dust.
Best for 500 sq ft max. For bigger areas, upgrade to LEVOIT LV600S.
Very—30W uses pennies per day. Quieter and cheaper to run than warm mist competitors.
No built-in, but pair with a separate hygrometer for precise control.
Ready for better air? Our Top Pick: Honeywell HCM350B delivers unmatched value.
