Model # H12 300HB

Internet #204234259

AIRCARE 5.4-Gal. Evaporative Humidifier for 3,700 sq. ft.


5.4-Gal. Evaporative Humidifier for 3,700 sq. ft.

  • Best square foot coverage per dollar spent
  • Save up to 10% off your annual heating bill
  • Many health benefits
$11560 /each
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Frequently Bought Together

Product Overview

The H12 300HB offers convenient whole house coverage in a single bottle design. It adds invisible moisture to your home by moving dry air through a saturated wick. Maintaining proper humidity levels between 30-50% in your home/office/workplace has been scientifically proven to help prevent the flu and allergies. It reduces static electricity, relieves dry skin and scratchy throat, and protects fine furniture and wood floors. Proper humidity makes you feel warmer allowing you to lower your thermostat setting which will save money.

  • 5.4-Gal. water capacity
  • Up to 3,700 sq. ft. coverage
  • Up to 11.83-Gal. daily output
  • Analog controls with digital display
  • 4-speed motor
  • Adjustable humidistat and automatic shut-off
  • Water refill and check filter indicators
  • Casters for easy mobility
  • Easy-fill water bottle w/refill hose

  • Click here for more information on Electronic Recycling Programs

Info & Guides

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


Air Treatment Product Type
Console Humidifier
Color Family
Browns / Tans
Control Type
Humidifier Features
Adjustable Humidistat,Automatic Moisture Control,Automatic Shut Off,Tank Empty Indicator,Water Level Indicator
Humidifier Tank Capacity (Gallons)
Included Items
No additional items included
Minimum run time (hours/tank)
Moisture dispersion type
Number of Fan Speeds
4 or More
Product Weight (lb.)
Room Size (sq. ft.)
Whole House
Voltage (volts)
Water Filter Replacement Model#

Warranty / Certifications

Certifications and Listings
ETL Listed
Manufacturer Warranty
2-year (less wicks/filters)

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Customer Questions & Answers

Can I return this in store? Will there be a restocking fee?

Can I return this in store? Will there be a restocking fee?
Asked by: LP
Thank you for your recent inquiry with The Home Depot, LP. This humidifier has a 90-day return policy. You may view our full return policy by clicking the following link: We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot.
Answered by: THDSupport
Date published: 2017-03-13


Asked by: RONDO
This model is not designed to be used with an automatic water supply.
Answered by: EssickAirProducts
Date published: 2016-01-03
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Customer Reviews

5.4-Gal. Evaporative Humidifier for 3,700 sq. ft. is rated 3.0 out of 5 by 15.
Rated 1 out of 5 by from This is a replacement for the same humidifier that I purchased and returned because the fan switc... This is a replacement for the same humidifier that I purchased and returned because the fan switch was defective. I ordered a replacement and find that this one has a defective fan motor, and will be returning it. I'm done with this brand and will be purchasing a humidifier elsewhere.
Date published: 2016-12-03
Rated 4 out of 5 by from given as gift Gave this to my brother as Christmas Gift. He uses a wood stove to heat his house in NH. He did say it is not convenient to fill it. Also did say it works great. Not too sturdy though so you have to be careful not to bump into anything when wheeling it to sink to refill with hose. I will say I am not sure what he thought they would be made out of !! Plastic is what they all are made from.
Date published: 2016-01-05
Rated 3 out of 5 by from ideal for the hard of hearing This unit replaced a console humidifier we had used for nearly 20 years. First thing I noticed was how thin the plastic housing was. It feels flimsy and fragile. I did like the single large wick, it fits well and the design makes sense. The single water tank is not large, so if you plan on treating a large area, plan on refilling 2 or 3 times per day. Also, several times the tank did not drain into the console refilling, and the unit stopped, display read it needed filling (F) and the tank was full. Customer service sent a replacement part and a pvc shim to help line things up. Works better now. The fan (which has 4 speed settings) was initially quiet, but in the course of a couple of weeks it went from quiet to very noisy. It rattles like crazy! This thing makes so much noise that we keep the door closed in the rooms we are using. I've checked and tightened all the visible screws, but it made no difference. The humidity level in the house is well maintained using this unit. If you don't mind the noise, buy with confidence.
Date published: 2014-01-07
Rated 4 out of 5 by from Very satisfied We've had the unit in service for a week. When we started it running the humidity in the house was 25%. In the last week it has fluctuated between 36-42%. (We have it set on 40, running the fan at the lowest speed.) Two downsides are that the fan is fairly loud at higher speeds (but we discovered we don't need to use those speeds), and, as another reviewer noted, the refill tank can be a bit tricky to set in place so that it drains properly. Being careful in putting it in the unit is necessary to insure the valve is properly seated to work properly. We are, however, quite pleased with our purchase. It is working very well. Within a couple of hours of turning it on we noted the house felt warmer. My wife's hands, which crack badly every winter due to dryness (even w/lotions), are much better this week, with no cracking. Throughout the week I have been wearing fewer layer of clothing around the house, without changing the thermostat setting. The controls are easy to use. The refill hose makes refilling the tank simple. We are operating the unit (which is rated for up to 2500 sq. ft.) in a home of about 1400 sq. ft.
Date published: 2013-12-21
Rated 5 out of 5 by from Excellent Unit Of course something plumbed so you don't have to add water would be better but at this price very impressive. It works very well in maintaining nice humidity levels. No more static shock!
Date published: 2015-03-24
Rated 3 out of 5 by from The product does not live up to its description on the website. The website description includes "Quiet night mode" but in reality it is just the lowest fan speed setting which is not quiet and reduces the output allowing overnight humidity to drop. Its bottle is much too small and requires at least three fillings per day just to maintain 40% in our 2400 square feet home during the heating periods. Disappointed but will keep it. Have to have one running for health.
Date published: 2013-12-31
Rated 1 out of 5 by from what a joke If you want to spend all your time adjusting the tank This is the tool for you. Its noise level is loud enough to drown out a naggin spouse. What a waste of money
Date published: 2014-10-10
Rated 3 out of 5 by from It works well, but is loud on the higher fan settings Worth the price but it is a little loud on the higher fan settings
Date published: 2014-01-07
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