Ultrasonic · Honeywell

Honeywell HE300A1005 Humidifier

Ultrasonic humidifier

Updated October 2026

Quick verdict

A well-matched choice for dry winter bedrooms.

Strength
18 gallons per day tank.
Trade-off
Needs regular cleaning to stay hygienic.
Right buyer
Dry winter bedrooms.
Run time per fill
24 hours
Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Why it matters

The Honeywell HE300A1005 Humidifier is an ultrasonic humidifier with a 18 gallons per day tank.

Run time per fill, per the maker: 24 hours.

Aim for 40 to 60 percent relative humidity indoors: drier air irritates airways and skin, wetter air feeds dust mites and mold. Use distilled or demineralized water to avoid the white mineral dust ultrasonic mist leaves behind.

Its stated run time of 24 hours is one of the shortest run times we cover: 4 of the 69 humidifiers with a stated figure come in lower, and the range runs from 10 hours to 130 hours.

Price-wise it sat in the dearest third of the 74 ultrasonic models we cover when we checked; the button shows today's price.

It qualifies for our list Best Cool Mist Humidifiers, where it is ranked against every model that meets the same rule.

Compared with the Honeywell HUL520BC Humidifier: run time 24 hours here vs 20 hours.

Who it's for, and who should skip it

Good fit if

  • Dry winter bedrooms
  • Owners who will clean it weekly

Look elsewhere if

  • Rooms far larger than its rating

Pros and cons

Pros

  • 18 gallons per day tank
  • Runs 24 hours per fill

Cons

  • Needs regular cleaning to stay hygienic
  • Ultrasonic mist leaves white dust with hard water

Limitations to weigh

  • Not stated on the Honeywell HE300A1005 Humidifier listing: rated room size, noise level, power draw. Ask the seller or check the manual before relying on it.

Specifications

The bracket shows where each figure comes from.

Model numberHe300a1005Retailer
Capacity18 gallons per dayRetailer
Run time per fill24 hoursRetailer

Alternatives worth comparing

More room humidifiers we cover

All room humidifiers, compared in one table · Every Honeywell product we cover

Final verdict

A well-matched choice for dry winter bedrooms. Confirm the model it fits before ordering.

Where to buy

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

How long does the Honeywell HE300A1005 Humidifier run on one fill?
The listing gives 24 hours from its 18 gallons per day tank, on the setting the seller measured; on high it runs out sooner.