# What is the most energy-efficient portable humidifier available? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What is the most energy-efficient portable humidifier available?

## Products

### Vicks VUL525
```yaml
product: vicks-vul525
brand: Vicks
price_gbp: 12.44
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
humidistat: false
noise_level: 39
auto_shutoff: true
coverage_area: 250
```

- **Price:** £12.44 [^1]
- **Summary:** The Vicks VUL525 is a compact ultrasonic cool-mist humidifier with a 1.8-litre tank, adjustable mist direction, quiet 39 dB operation, and VapoPad compatibility. It suits small bedrooms, nurseries, and personal spaces up to 250 square feet, with automatic shutoff for safety.
- **Ideal For:** It is a relatively energy-efficient choice because its ultrasonic design uses 21 watts while providing adjustable mist output for spaces up to 250 square feet.
- **Additional Sources:** [^2], [^3]

### GENIANI Portable Cool Mist Humidifier 250ML
```yaml
product: geniani-portable-cool-mist-humidifier-250ml
brand: GENIANI
price_gbp: 16.16
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
capacity: 250
noise_level: 38
auto_shutoff: Included
coverage_area: 65
```

- **Price:** £16.16 [^4]
- **Summary:** This compact ultrasonic cool mist humidifier has a 250 ml tank, two mist modes, a night light, and up to 8 hours of runtime. Its quiet operation and portable design suit bedrooms, offices, nurseries, plants, and cars.
- **Ideal For:** It suits the search for the most energy-efficient portable humidifier because it uses only 2W, includes auto shutoff to conserve energy, and covers up to 65 sq ft.
- **Additional Sources:** [^5]

### Crane EE-5951AD
```yaml
product: crane-ee-5951ad
brand: Crane
price_gbp: 22.05
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
capacity: 800
humidistat: true
auto_shutoff: true
coverage_area: 160
```

- **Price:** £22.05 [^6]
- **Summary:** The Crane EE-5951AD is a compact ultrasonic cool-mist humidifier with an 800 ml tank, coverage for rooms up to 160 sq ft, an aroma diffuser, and an optional color-changing light. Its portable tabletop design and quiet operation suit bedrooms, offices, desks, and other small spaces.
- **Ideal For:** This model suits energy-conscious users because its compact 800 ml tank, 160 sq ft coverage, ultrasonic operation, and automatic shutoff provide targeted humidification without the capacity and energy demands of a larger-room unit.
- **Additional Sources:** [^7], [^8]

### Vissani VK-8528A
```yaml
product: vissani-vk-8528a
brand: Vissani
price_gbp: 36.78
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
noise_level: 28
auto_shutoff: true
coverage_area: 400
```

- **Price:** £36.78 [^9]
- **Summary:** The Vissani VK-8528A is a 1-gallon ultrasonic cool-mist humidifier designed for rooms up to 400 square feet. Its dual nozzle, aromatherapy tray, automatic shutoff, and quiet operation make it suitable for bedrooms, offices, and medium-sized living spaces.
- **Ideal For:** This model suits people seeking an energy-efficient portable humidifier because its ultrasonic design, automatic shutoff, and 28 dB operation provide quiet humidification for spaces up to 400 square feet.

### PureGuardian H940AR
```yaml
product: pureguardian-h940ar
brand: PureGuardian
price_gbp: 14.71
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
output: 6436
capacity: 1893
humidistat: false
auto_shutoff: true
coverage_area: 350
```

- **Price:** £14.71 [^10]
- **Summary:** The PureGuardian H940AR is an ultrasonic cool-mist humidifier with a 0.5-gallon tank, aromatherapy tray, night light, Silver Clean protection, and up to 30 hours of operation on low speed. It suits small rooms, bedrooms, and users who want quiet operation and basic automatic shutoff without advanced humidity control.
- **Ideal For:** It suits energy-conscious users because its ultrasonic cool-mist technology provides 30 hours of operation on low speed from a 0.5-gallon tank and has no heating element, though it is not Energy Star certified.
- **Additional Sources:** [^11], [^12]

---
## References & Sources
[^1]: Best Buy, accessed 2026-09-13. https://www.bestbuy.com/product/mini-filter-free-cool-mist-humidifier-small-room-variable-mist-control-works-with-vicks-vapopads-white/JC24TRQPPZ
[^2]: McGrocer, accessed 2026-09-13. https://mcgrocer.com/products/vicks-vul525-mini-cool-mist-ultrasonic-humidifier-1-8-litre-2026425667
[^3]: Pharmazone, accessed 2026-09-13. https://pharmazone.com/en-ae/products/vicks-humidifier-mini-cool-mist-1-8l-525e1
[^4]: GENIANI, accessed 2026-09-13. https://geniani.com/products/humidifier-erie-250ml-white
[^5]: The Home Depot, accessed 2026-09-13. https://www.homedepot.com/p/Geniani-Humidifier-Erie-250ML-Black-G-1014-250MLB/329103696
[^6]: Staples, accessed 2026-09-13. https://www.staples.com/crane-personal-ultrasonic-cool-mist-tabletop-humidifier-0-2-gallon-for-rooms-160-sq-ft-white-ee-5951ad/product_24425412
[^7]: Quill, accessed 2026-09-13. https://www.quill.com/crane-personal-ultrasonic-cool-mist-tabletop-humidifier-02-gallon-rooms-160-sq-ft-white-ee-5951ad/cbs/55378249.html
[^8]: Canadian Tire, accessed 2026-09-13. https://www.canadiantire.ca/en/pdp/crane-ee-5951ad-ultrasonic-cool-mist-air-humidifier-essential-oil-diffuser-with-light-whisper-quiet-white-0-8-l-0430700p.html
[^9]: The Home Depot, accessed 2026-09-13. https://www.homedepot.com/p/Vissani-1-Gal-Ultrasonic-Humidifier-360-Degree-Turning-Dual-Nozzle-Cool-Mist-for-Medium-Room-in-White-VK-8528A/329673955
[^10]: Guardian Technologies, accessed 2026-09-13. https://guardiantechnologies.com/products/h940-0-5-gallon-30-hour-ultrasonic-cool-mist-humidifier-by-pureguardianr-reg
[^11]: Home Depot, accessed 2026-09-13. https://www.homedepot.com/p/Pure-Guardian-0-5-gal-Ultrasonic-Cool-Mist-Humidifier-for-Rooms-up-to-350-sq-ft-in-Blue-White-30-Hour-Runtime-on-Low-Aromatherapy-H940AR/300353650
[^12]: Kohl's, accessed 2026-09-13. https://www.kohls.com/product/prd-3556230/pureguardian-30-hour-ultrasonic-cool-mist-humidifier.jsp