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MoistAir 9 Gallon Top Fill Cool Mist Humidifiers #821-000

MoistAir 9 Gallon Humidifiers
MoistAir 9-Gallon Top-Fill Cool Mist Humidifiers with Digital Humidistat

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MoistAir 9 Gallon Humidifiers

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Top-fill cool mist humidifier provides up to 9 gallons clean, natural moisture for areas up to 1900 square feet. Includes built-in digital humidistat and evaporative wick.

Why Green

  • Improves indoor air quality
  • Requires little energy
  • Protects wood, furniture and other household items from dry air

Expert Rating:


The MoistAir 9-Gallon top fill humidifier is an economical way to provide powerful cool mist for a larger area up to 1,900 square feet. Plus, the unique top air-flow design allows you to neatly stow the unit in a corner or against a wall while in operation. The evaporative wick humidification system requires little energy and helps retain minerals and bacteria for only clean, natural moisture. An impressive 6-gallon top fill reservoir eliminates the need to constantly refill and carry messy water tanks! Other features include a digital humidistat for automatic output control, quiet fan speed for nighttime use, easy-roll castors, refill light and evaporative wick to retain minerals and bacteria. The easy-to-use humidifier is an affordable choice for those seeking relief from dry skin, sore throat, chapped lips, sinuses and other symptoms from drier environments. Covers up to 1,900 square feet.


  • Cool mist humidifier for areas up to 1,900 square feet
  • Disperses up to 9 gallons of water per 24 hour period
  • Water capacity: 6 gallons
  • Top fill design: can use a pitcher or water can to fill into the top front of the unit
  • Built-in digital humidistat: automatically turns on and off to maintain a desired humidity level. Settings set from 25% - 65% in 5% increments. At 65% set point, the unit will operate continuously.
  • Room humidity readings of 30% to 90%
  • Fan speeds: 2 – low and high
  • Auto shut-off and water refill light when tank is empty
  • Equipped with evaporative filter wick which retains minerals and delivers clean, moist air. Wicks are easy to clean and replace


To help reduce bacteria growth and keep maximum efficiency, the filter should be replaced at least once per season depending on use or water conditions. It is also recommended to clean the base and tank bi-weekly depending on use.

How it Works

The MoistAir 9-Gallon Top Fill humidifier adds invisible moisture to your home by moving dry inlet air through a saturated wick. As air moves through the wick, the water evaporates into the air, leaving behind any white dust, minerals, or dissolved and suspended solids. Because the water is evaporated, there is just clean and invisible moist air.


Technical Specifications

MoistAir 9 Gallon Humidifiers
MoistAir 9-Gallon Top-Fill Cool Mist Humidifiers with Digital Humidistat
Room Coverage 1900 sq. ft.
Tank capacity 6 gallons
Humidification Performance Up to 9 gallons/24 hours
Auto shut-off Yes
Fan Speeds 2 - low and high
Power Supply 120V, 80 Watts
Weight 17 lbs
Dimensions 18" x 12 1/2" x 21"
Warranty 1 year parts, 2 years motor


The unit's simple design will help improve air quality and alleviate symptoms from dry air in a room with a comfortable cool mist. The cool mist will also protect furniture, computers, electronics and other household items from becoming too dry and ultimately prolonging use. The evaporative wick humidification method makes this unit very energy efficient as it only requires less than 80 watts on its highest speed. Overall, the MoistAir 9-Gallon top fill humidifier is a convenient, simple to operate unit that gets the job done quickly and effectively.

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MoistAir 9 Gallon Replacement Filters (2 Pack)

Shipping Costs*
Item #: ES-HU 821FLTK

  • Replace at least once per season
  • Includes 2 replacement filters

Availability: In Stock. Ships within 2 - 3 business days
The MoistAir 9 Gallon Humidifiers is only one of our humidifiers. See how the MoistAir 9 Gallon Humidifiers compares to other models in our humidifiers comparison. You can view other models around $1000000000 with good plus rating on all humidifiers. This page features one of our humidifiers - the MoistAir 9 Gallon Humidifiers.