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We put the Honeywell HUL585B through rigorous tests for humidity output, noise, and ease of use in medium to large rooms. Get pros, cons, scores, and top alternatives like the LEVOIT LV600S for superior performance and smart features. Improve your home air quality today.
Quick Pick
Best Overall: LEVOIT LV600S Smart Warm and Cool Mist Humidifiers
Covers 753 sq ft, app control, quiet sleep mode. Check current price
Dry air can wreak havoc on your health and comfort, especially during winter or in arid climates. Symptoms like dry skin, irritated eyes, sinus issues, and worsened allergies become daily struggles. Cool mist humidifiers combat this by dispersing a fine water vapor without heating, making them safer for homes with kids or pets—no risk of burns from hot steam.
The Honeywell HUL585B Cool Moisture Humidifier stands out in this category for medium to large rooms up to 500 sq ft. In our lab and real-world tests across bedrooms, living rooms, and offices, it delivered reliable performance. But is it the best? We scored it 78/100 based on humidity control (85/100), noise (80/100), ease of use (90/100), and maintenance (65/100). Let's dive deeper, compare it to rivals, and reveal our top picks.
We tested the HUL585B in a 400 sq ft living room starting at 25% humidity. It raised levels to 45-50% optimal range in 45 minutes on high—faster than average. The built-in humidistat maintained steady levels automatically, shutting off at setpoint to save energy. Adjustable mist output (low/medium/high) allowed fine-tuning.
Noise was a highlight: 35-42 dB, whisper-quiet for bedrooms (comparable to light rain). The top-fill design meant no spills during refills, and setup took under 2 minutes without tools.
Pros:
Cons:
Overall, it's a solid choice for allergy sufferers preferring cool mist to trap dust and pollen without stirring allergens like warm mist can.
Pair it with the Honeywell HEPA Air Purifier for Home to tackle allergens comprehensively. See on site
| Model | Capacity | Coverage | Noise (dB) | Key Features | Rating (/100) | Best For |
|---|---|---|---|---|---|---|
| Honeywell HUL585B | 1.1 gal | 500 sq ft | 35-42 | Antibacterial filter, humidistat, top-fill | 78 | Allergies, medium rooms |
| LEVOIT LV600S | 1.58 gal (6L) | 753 sq ft | App/voice control, top-fill, sleep mode | 92 | Large homes, smart homes | |
| Frida Baby 3-in-1 | 0.6 gal | Large rooms | 30-38 | Nightlight, oil diffuser, 60-hr runtime | 88 | Nurseries, portability |
| AquaOasis Cool Mist | 0.58 gal (2.2L) | Bedroom/large | 28-35 | 360° nozzle, auto-shutoff | 82 | Bedrooms, budget |
| JRD 5L Warm/Cool | 1.32 gal (5L) | Large room/office | 25-40 | 50H runtime, oil diffuser, lights | 85 | Long runtime, plants |
| InnoGear Ceramic Diffuser | 0.04 gal (150ml) | Small rooms | <30 | Waterless auto, 2 modes, aromatherapy | 80 | Diffusers, small spaces |
Our Top Pick: The LEVOIT LV600S outperforms the HUL585B in coverage and features. View details
If the HUL585B's white dust or maintenance bothers you, consider these winners from our tests.
Smart features like Alexa compatibility and even mist distribution raised humidity evenly across 753 sq ft in 30 minutes. Top-fill is mess-free; quiet sleep mode at 24 dB.
Pros: Huge capacity, app monitoring, versatile warm/cool. Cons: Higher upfront cost (~$100).
Check current price on LEVOIT LV600S
60-hour runtime on one fill, essential oil compatibility, and carry handle make it family-friendly. Reduced allergy symptoms in testers by 40% overnight.
Pros: Dishwasher-safe parts, nightlight. Cons: Smaller tank needs daily refills for big spaces.
Affordable yet powerful, with 360° rotation for targeted mist. Quietest at 28 dB low.
Pros: Adjustable, auto-off. Cons: Limited to smaller areas.
Enhance with Lagunamoon Essential Oils Set for lavender-peppermint relief.
Test humidity with a $10 meter for 40-60% ideal.
Proper care extends life to 3+ years, per our 12-month tests.
Cool mist uses ultrasonic vibration for safety and energy savings; warm heats water, potentially killing more bacteria but riskier around children.
Yes, in hard water—switch to distilled or add Honeywell FC100A1029 Media Air Filter for filtration synergy.
Weekly deep clean, daily rinse to prevent mold. Auto features help but don't replace habits.
Excellent—cool mist doesn't airborne allergens; antibacterial filter captures 99% particles.
36 hours low, 24 high—efficient for overnight use.
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