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White ultrasonic humidifier with transparent 1.11 gallon tank and adjustable mist control

Optimus Enterprise Inc

Optimus Enterprise Inc U31001 1.5 Gallon Cool Mist Ultrasonic Humidifier

SKU CH-HSDR-PMJVY MPN U31001

A 1.5 gallon cool mist ultrasonic humidifier runs up to 18 hours with adjustable mist volume and automatic shutoff when empty

  • Product typeHumidifier
  • Key features1.11 gallon tank capacity Output of 1.5 gallons in 18 h Feat
  • Product colorWhite
  • 18-hour continuous operation from a single fill
  • 5 gallon daily moisture output for large spaces
  • 11 gallon transparent tank with easy-fill handle
  • Whisper-quiet ultrasonic performance suits bedrooms
  • Auto shut-off and refill light prevent dry running

1.5 Gallon Ultrasonic Humidifier

The Optimus U31001 is a cool-mist ultrasonic humidifier designed for residential spaces needing consistent moisture output. It produces up to 1.5 gallons of mist over an 18-hour runtime from a 1.11 gallon tank. The unit suits bedrooms or living areas where quiet operation is essential for comfort.

Check power and placement before use

Verify a standard household outlet is accessible near the intended location, as the unit requires mains power for the ultrasonic transducer. Ensure the surface is level, water-resistant and large enough to hold the humidifier with its removable tank attached. Keep the device away from electronics, vents and direct sunlight to prevent condensation issues.

Transparent tank with handle and auto shutoff

The white housing features a transparent 1.11 gallon water tank fitted with a carry handle for easy refilling at a sink. A water-empty automatic shutoff switch stops the transducer when the tank runs dry, while a refill indicator light signals when attention is needed. Adjustable mist volume control lets you set output up to 230 mL per hour for daily comfort.

How it compares

Measured against everything we stock in Ultrasonic & Evaporative Humidifiers, at today’s prices. Recalculated every night.

Price $40.99
Typical for this category: the median of 21 items is $40.99.

Specifications

Product
Brand nameOptimus
Model nameU31001
Product typeHumidifier
Product colorWhite
Size & build
Shipping weight0.91 kg
Package size330 × 279 × 254 mm

Questions about this item

Does the Optimus U31001 come with everything needed to run it, or must I buy a filter or cartridge separately?

The unit includes the humidifier base, a removable 1.11-gallon tank with handle, and the built-in auto-shutoff switch with refill light. No separate filter or cartridge is required for operation.

The specs list both 1.5-gallon output and a 1.11-gallon tank — which capacity should I base my room-size decision on?

The 1.11-gallon tank is the physical water volume you fill; the 1.5-gallon figure is the total moisture the unit can disperse over an 18-hour run. Use the tank size for refill planning and the output rate for coverage estimates.

What does the 230 mL per hour output mean for actual humidity in a bedroom overnight?

At the maximum 230 mL/hour setting the humidifier can run for the full 18 hours on one fill, delivering roughly 1.5 gallons of cool mist — enough to raise humidity noticeably in a medium-sized bedroom through the night.

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