The Honeywell HUL430B is a cool-misting ultrasonic humidifier intended for small to medium-sized rooms, roughly 300 to 500 ft2. It has a bottom-filling tank with a usable capacity of 4.5L (1.2 gal) and can run for up to nearly 20 hours. It also boasts a tray for adding a few drops of your favorite essential oil.
Our Verdict
The Honeywell HUL430B is decent for home use. It has a chic, modern appearance, with a compact design that will blend in within most living spaces. Its humidification capacity is also sufficient for fairly large spaces, in spite of being advertised mainly for medium-sized spaces. While it lacks a built-in humidistat, it does at least have an automatic off function, which will turn the unit off once its tank has run dry.
Compact design.
Humidification capacity is good.
Auto-off functionality.
No on-board humidistat.
Somewhat annoying to clean.
The Honeywell HUL430B is a good option for use in bedrooms. It's compact, quiet, and has no distracting lights visible through closed eyelids, allowing you to get a good night's rest. Its capacity is also sufficient for even large bedrooms. You can add essential oils to the aromatherapy tray at the back of the unit if you'd prefer a scented mist as well. Its 19-hour max runtime will easily last you through the night if you fill it up, and thankfully, it's equipped with an automatic off function that will turn the humidifier off once its tank has run dry. Unfortunately, it lacks a humidistat to automatically adjust misting levels, and it doesn't come with a remote control either.
Quiet operation.
Auto-off functionality.
Fairly long runtime.
No on-board humidistat.
Somewhat annoying to clean.
The Honeywell HUL430B is pretty demanding in terms of maintenance. It's fairly easy to take apart for the most part, with the small exception of its fiddly essential oil tray. None of its components are dishwasher safe, and you'll need to be careful when cleaning the base unit to avoid getting water into the rear vents.
Somewhat annoying to clean.
The Honeywell HUL430B provides good humidification capacity. While advertised for small to medium-sized spaces, it'll efficiently humidify fairly large spaces too, like smaller apartments, bigger living rooms, or college dorms.
Humidification capacity is good.
The Honeywell HUL430B is energy-efficient. Its max humidification capacity is pretty impressive for a unit with this low-power draw. That said, like any cool misting unit, it's best used in warmer, drier environments, where its cooling properties can help regulate temperature.
Good efficiency.
Performance Usages
Check Price
Differences Between Sizes And Variants
This Honeywell humidifier is only available in two colorways: 'Black,' which is sold as the HUL430B, or 'White,' which is sold as the HUL430W. We tested the 'Black' model, and for those interested, here's the product label.
If you encounter another variant of this unit, let us know in the forums, and we'll update our review.
Popular Humidifier Comparisons
The Honeywell HUL430B is a cool-misting ultrasonic humidifier. Compared to the Honeywell HUL545W, another similarly positioned model within the company's lineup, the HUL430B has a more modern appearance but is otherwise similar in terms of performance and features. It has good humidification performance, can be used with essential oils, and has an automatic shutoff for when its tank runs out, but it's worth noting that it's a bit more of a hassle to clean compared to some other units in the same price range.
Test Results
The Honeywell HUL430B is somewhat demanding in terms of maintenance. It comes apart somewhat easily for the most part, with the exception of the essential oil tray, which can be a bit of a nuisance to pull out the back of the unit due to its small grip. When cleaning the base unit, you'll also have to be careful not to get any water into the rear vents.
Despite its wildly different appearance, the Honeywell HUL430B has a similar set of features to the Honeywell HUL545B. You can adjust the mist level with the front rotary dial. There's a rear tray for adding a few drops of your favorite essential oils.
The HUL430B is also equipped with an automatic off function, which will turn the unit off once the tank has run dry. Unfortunately, there's no humidistat, and the humidifier won't automatically adjust its misting level depending on desired ambient humidity.
This is an efficient humidifier. It provides good humidification capacity for a unit with this low a power draw.
Overall efficiency is impressive. That said, it's best used in warm and dry environments, where the cooling properties of ultrasonic humidifiers are most helpful. Using this machine in colder, drier environments can make your heating system work a little harder than usual, which could result in a slight bump to your energy bill if you use the unit often.