Honeywell HUL520B Mistmate Cool Mist Humidifier
- 0.5 gallon tank
- Up to 20 hours per filling
- Ultrasonic cool mist, variable output
- Auto shut-off when empty
- Desktop or nightstand size
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A small, quiet cool mist humidifier for a desk, nightstand or nursery corner. Its listing gives conflicting filter and voltage details, and it suits only personal spaces.
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ASIN: B00NWA7GOICategory: Humidifiers
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Overview
Ultrasonic vibration turns water into a fine visible cool mist in this compact unit. A wide tank opening simplifies filling and cleaning, and output is adjustable.
Compact size and quiet running suit a bedside or desk where a big unit will not fit. Coverage is small, and the listing says no filter while another field names a demineralization cartridge.
Who it's for
Small bedrooms, nurseries and office desks suit its size and quiet output. Larger rooms and open plans need a unit with a bigger tank and rated coverage.
Pros and cons
- Compact for desks
- Wide opening for cleaning
- Variable mist output
- Small coverage area
- Filter details conflict
- Voltage listed as 230 volts
- Room size not stated
Performance notes
An ultrasonic plate breaks water into fine droplets without heat, so the mist is cool and quiet. Mist spread is limited, which suits a small personal space. Hard water can leave mineral dust.
Specifications
| Brand | Honeywell |
|---|---|
| Dimensions & fit | |
| Item Dimensions D X W X H | 8.5 x 8.5 x 9.5 inches |
| Item weight | 3 pounds |
| Capacity & performance | |
| Capacity | 0.5 gallons |
| Power & efficiency | |
| Voltage | 230 volts (as listed) |
| Construction & materials | |
| Color | Black |
| Other details | |
| Runtime | Up to 20 hours |
| Operation Mode | Ultrasonic cool mist |
| Filter Type | No filter required (specs list a demineralization cartridge) |
| Control Type | Touch |
| Room Type | Bedroom, nursery, office |
Frequently asked questions
How big is the Honeywell Mistmate humidifier?
It measures 8.5 x 8.5 x 9.5 inches and weighs 3 pounds, sized for a desktop or nightstand.
Does the Honeywell Mistmate need a filter?
The description says no filter is required, but one spec field lists a demineralization cartridge. Check with Honeywell.
How long does the Honeywell Mistmate run per fill?
Up to 20 hours, with auto shut-off when the tank is empty.
What voltage does the Honeywell Mistmate use?
The specs list 230 volts. Confirm the version before ordering for a US outlet.