Model # U31002

Internet #205326965

Optimus 1.5 gal. Cool Mist Ultrasonic Humidifier


1.5 gal. Cool Mist Ultrasonic Humidifier

$3779 /each
store icon Loading Buying Options...
package icon Loading Buying Options...
Sorry, but we ran into issues loading these options. Please try refreshing.

Frequently Bought Together

Product Overview

This Optimus U-31002 cool mist ultrasonic humidifier features a 1.1-gal. tank capacity and runs up to 18 hours per filling to help keep your space comfortable. Adjustable mist-volume and humidistat humidity controls offer customizable operation. The whisper quiet operations ensure your sleep won’t be disturbed.

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents.  Download a free copy from the Adobe Web site.



Product Depth (in.)
Product Height (in.)
Product Width (in.)


Air Treatment Product Type
Tabletop Humidifier
Color Family
Control Type
Humidifier Features
Tank Empty Indicator
Humidifier Tank Capacity (Gallons)
Included Items
No additional items included
Minimum run time (hours/tank)
Moisture dispersion type
Cool mist
Number of Fan Speeds
Product Weight (lb.)
Room Size (sq. ft.)
Small (Less than 400 sq. ft.)
Voltage (volts)
Water Filter Replacement Model#
No replacement filter required

Warranty / Certifications

Certifications and Listings
No Certifications or Listings
Manufacturer Warranty
Optimus 1 Year Limited Warranty

More Products With These Features


Customer Questions & Answers

Does this leave "white dust"?

Many cool mist humidifiers can leave a white dust on any and all nearby surfaces. Does this?
Asked by: Kathy

Best way to clean unit

can a bleach and water mix be used to clean the water tank ,to prevent mold. thank you ,greg
Asked by: gj
  • y_2017, m_7, d_25, h_2CST
  • bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasquestions, tq_2
  • loc_, sid_205326965, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 13ms

Customer Reviews

1.5 gal. Cool Mist Ultrasonic Humidifier is rated 4.3 out of 5 by 3.
Rated 4 out of 5 by from Simply Good but, 1st ever my humidifier! i can smell something like plastic or chemical from water vapor which is not good. night lamp switch is hard to push so every time you turn on or off you have to hold unit with other hand. Vapor is good and with force. but you can not have it on full flow as you will have water wet around your unit as force is not that much that can flow vapor away when it is in full flow. otherwise it is good if you use 75% of regulator. Price is Okay. Noise is not too much. but you can hear even it is 10 feet away from you at night. but it is not bothering me. I will buy another one for my main room but i will try something else just to try out. I AM HAPPY With This UNIT. BUT, I am expecting that if cleaning instruction was included. i dont know how to clean as water stays in all time and it is not good if you dont clean a week.
Date published: 2015-01-06
Rated 4 out of 5 by from Very Good Product - Inconvenient to fill The unit seems to work very well as far as a humidifier so the overall quality seems very good to excellent. My only minor complaint is that the bottom section gets filled with water so in order to refill each night, one has to unplug the unit and take the whole unit to a sink to first empty the bottom section, then fill the reservoir. Humidifiers I have owned in the past were much easier/simpler to fill.
Date published: 2015-01-05
Rated 5 out of 5 by from Love it! The product performs exactly as described. The mist is fine enough to prevent the carpet or tabletop from getting wet and the amount of moisture produced prevented static electricity in a medium sized room.
Date published: 2015-01-13
  • y_2017, m_7, d_25, h_9
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_3
  • loc_, sid_205326965, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 15ms