Honeywell HUL570 Top-Fill Cool Mist Humidifier review

The Honeywell HUL570 is an earlier 1.25-gallon ultrasonic humidifier with removable top-fill tank, manual mist knob and 180-degree outlet. The manual names four removable pieces as top-rack dishwasher-safe—not the tank or powered base. Honeywell’s licensed store marks both finish offers discontinued, so this is most useful for identifying an existing unit or checking a specific used/clearance listing, not as a default current-buy recommendation.

Two different ways to refill, one manual routine

The HUL570-series manual gives a choice many small ultrasonic units do not: pour cool water from a pitcher into the tank while it sits on the base, or lift the removable tank and carry it to a sink. Either is a top-fill routine; neither requires flipping an inverted bottle. At 1.25 gallons (4.7 liters), the reservoir is larger than a half-gallon bedside unit, but a full tank is still a substantial lift. Honeywell tells owners to carry it with two hands, one on the handle and one supporting the bottom. Before filling a newly unpacked unit, install the float paddle correctly; the manual warns that a misseated float can stop water flow or cause a leak.

The two options help if you want more water capacity than a mini without committing to a sink-only routine. This is not automatic fill, and capacity alone does not establish the interval between refills; output and room conditions matter.

Manual output means the room sets the pace

A rotary power knob varies visible output; the outlet turns 180 degrees to aim mist away from a wall, bed or furniture. Neither feature senses humidity. The manual documents no target, automatic cycling, timer, app or remote. Empty-tank shutdown is not a humidistat.

Honeywell recommends checking humidity with a separate monitor, reducing the knob once comfortable, and stopping or reducing output if condensation appears. Place it on a stable, water-resistant surface at least 12 inches from a wall and four feet from bedside; the manual warns against leaving it unattended in a closed room. If automatic RH response matters, compare a true humidistat model such as the HUL588.

The useful dishwasher detail is narrow and exact

Weekly cleaning is recommended. The Mist Outlet, Outlet Cover, Mist Chamber and Tank Cover are top-rack dishwasher-safe; the tank is not in that group, and the powered base must never be submerged. Empty and refresh water daily, keep scale removal separate from disinfection, rinse thoroughly and handle the nebulizer gently. Four dishwasher-safe pieces do not make the reservoir self-cleaning.

Ultrasonic mist can carry hard-water minerals into the room as white dust. Honeywell suggests distilled water or HDC500 demineralization treatment. Both exact licensed finish pages say one cartridge is included, but the manual says only some packages include it; check an older or used unit. Replace the cartridge every 20–30 fillings or when white dust returns. It is optional mineral treatment, not a wick needed to make mist.

Room size and run time are not settled specifications

HoneywellPluggedIn labels the room “medium” and elsewhere says medium-to-large; the licensed store says medium-to-large. Neither gives square feet. Its product page says up to 36 hours without naming a setting; the store repeats 36 hours per fill but lists 24 hours on low in the details. The low-setting runtime and a numeric coverage minimum therefore remain unknown.

Dimension axes align as labeled: 13.6 inches long, 6.8 wide and 13.5 high; the licensed store lists 5.2 pounds before filling. The manufacturer says three-year warranty, while the store details say two. Check the paperwork accompanying a specific unit.

Which HUL570 variant, and what changes the match?

The manufacturer page names the HUL570B/W family. Honeywell-licensed U.S. listings identify black HUL570B (listed MPN HUL570BV1) and white HUL570W, with matching 1.25-gallon controls and the same series manual. Both store listings say discontinued. An FDA device-registry search result still shows the variants as in commercial distribution; that registry status does not overturn the exact store’s discontinued offer or establish that a particular seller has safe, complete stock. This review therefore keeps the model as an earlier reference and does not put it in default recommendations.

For an existing unit, the finder can identify its documented top-fill, ultrasonic and manual-dial routine, 180-degree outlet and named dishwasher-safe pieces. It should not satisfy an essential demand for a selected RH target, numeric coverage rating or known low-setting runtime. A separate aroma route is not documented; the manual prohibits oils in the mist outlet, reservoir and tank, so an aroma-pad request remains unsupported rather than being treated as “no oil route.” If top-fill and a dial are enough, compare the HUL585 as a current-reference top-fill alternative; it uses a similar tank size and manual control but has a separate oil pad and no dishwasher-safe parts specified in its manual. For automatic humidity response instead of manual adjustment, compare an electronic humidistat plan such as HUL588 and check its own care and variant evidence.

Exact-model and evidence note

The Honeywell HUL570B/W page links the series manual. Direct requests for the official page and its image/PDF returned HTTP 403; the linked manual and exact black/white pages from Honeywell-licensed U.S. stores are archived. The images match the variants, but the source does not identify photography versus render. The CPSC exact-name lookup was empty on October 23, 2026; this is not a guarantee for all variants or future notices. This assessment is documentation-based, not hands-on testing, personal ownership or a customer-review summary.