Hiswelle H786-BK 8L Smart Cool Mist Humidifier

Smart: Hiswelle H786-BK is an 8-litre ultrasonic cool-mist humidifier with app, remote and touch controls. Its listing describes a large-capacity unit with scheduled and humidity-based settings, but the claimed coverage varies across the page, so use its area figures as estimates rather than a confirmed fit for a specific room.

At a glance

App controls are described for power, humidity settings, mist levels, sleep mode, light, timer and scheduling.
Humidistat-based automatic operation is described as switching the unit on or off to maintain a selected humidity.
A water-level window, removable tank and low-water shut-off are listed.
Aroma function and multicolour ambient lighting are described.

Price

$129.99Save 19%

Reference price: ~~$159.99~~

Price checked: Nov 13, 2026

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Pros and cons

Pros

App, remote and touch control options give buyers several ways to adjust settings.
The listed 8-litre capacity and 40-hour runtime claim may reduce refill frequency compared with smaller-tank options, depending on use.
Timer and scheduling options support planned operation, while the humidistat is intended to regulate output around a selected humidity.

Cons

A 25-watt unit requires access to AC power, so placement depends on a nearby outlet.
Its tall listed dimensions may require more floor space than a compact tabletop humidifier.

Technical specifications

18 specifications

Identity
Brand	Hiswelle
Model	H786-BK

Performance and operation
Water capacity	8 liters
Claimed runtime	40 hours
Mist output	350ml/h
Operation mode	Ultrasonic
Power	25 watts
Power source	AC

Controls and features
Control methods listed	App, Remote, Touch
Timer	1-12 hours
Mist settings	3 levels
Maximum humidity setting	90% RH
Noise claim in sleep mode	35dB

Coverage and dimensions
Claimed floor area in details	500 square_feet
Claimed coverage in feature text	505 square feet
Dimensions listed	64D x 18W x 21H centimetres

Materials and appearance
Material listed	Acrylonitrile Butadiene Styrene
Colour	Black

What to know before buying

Listing details to confirm

The listing is inconsistent about capacity presentation, describing the same unit as 8L and 2.1Gal in feature text while the title says 2.4Gal. Claimed coverage also varies between 500 square_feet, 505 square feet and the title's 505ft², and no operating conditions are given for the 40-hour runtime or coverage claims. Confirm the intended capacity and room fit before purchase. The listing also describes top filling in the title, but no detailed filling procedure is supplied.

What’s in the box

Included

Smart humidifier
Remote
User manual

Who is it for?

A good fit for

People wanting app, remote and touch controls, with humidity settings, timer and scheduling.
Bedrooms or home offices where a floor-standing humidifier and selectable mist levels suit the available space.
Buyers who want the listed aroma function and ambient lighting alongside humidification.

Less suited to

Anyone needing a verified coverage figure for a precisely sized room, given the inconsistent area claims.
Buyers who need a compact tabletop unit or a confirmed runtime under a particular mist setting.

Hiswelle H786-BK 8L Smart Cool Mist Humidifier · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.8 / 5 · 37 ratings

5 stars85%85%
4 stars6%6%
3 stars9%9%
2 stars0%0%
1 star0%0%

Aggregate customer ratings lean positive, with most ratings in the top category, alongside some mid-range ratings. This offers a generally favourable but limited signal, not evidence about specific performance or the listed coverage, runtime or noise claims.

Frequently asked questions

How large an area is this humidifier listed to cover?

The details list 500 square_feet, while feature text says 505 square feet and the title claims 505ft². Treat coverage as unconfirmed and check whether the stated area suits your room.

Can it adjust humidity automatically?

The feature text describes a humidistat and a custom humidity setting, with the unit activating or stopping to maintain the selected level.

What controls are listed?

The listed control methods are app, remote and touch. The app functions described include power, humidity, mist levels, sleep mode, light, timer and scheduling.

What comes in the box?

The listed contents are the humidifier, a remote and a user manual.