Enviracaire EWM-300W Warm Mist Humidifier

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EWM-300W Warm Mist Humidifier


May we suggest:
Enviracaire EWM-211D Humidifier

Enviracaire EWM-300W Warm Mist Humidifier

Now you can add moisture to the air without the risk of mold and other microorganisms growing in the humidifier reservoir. Enviracaire Warm Mist Humidifiers are unique, with a dual germicidal process featuring both ultraviolet light and boiling water, creating a mist virtually free of mold, mold spores, and bacteria. So unlike many humidifiers, where the water can be a stagnant source of microbial growth, the Enviracaire EWM-300 destroys 99.99% of bacteria found in tap water.

The Enviracaire Warm Mist Humidifier uses a two-step approach to eliminate potentially harmful microorganisms before they are spread into the air. First, a special UV germicidal bulb shines on the water, as it passes from the cold water reservoirs to the hot. Second, the water is boiled in the hot water reservoir, just before the mist is distributed to the room.

EWM-300W Product Features
  • Humidifies room with comforting, warm mist, virtually 100% free of bacteria, mold, and spores
  • Variable humidity control
  • 2.75 gallon capacity, for maximum humidity output
  • Exclusive dual germicidal process uses ultraviolet light and vaporization
  • Stainless steel hot water reservoir
  • Refill/Reset indicator light
  • Replacement bulb indicator light (replace bulbs annually)
  • Three-Year Warranty
EWM-300W Technical Specifications
  • Dimensions: 14.09"L x 13.03"W x 12.52"H
  • Model: Enviracaire EWM-300W
  • Weight: 7lbs 8oz
  • Capacity: 10.4 Liters/2.75 Gallons
  • Operation Range: 400 Sq. Ft.
  • Continuous Operation: 24hrs.
  • Voltage: 120VAC, 60Hz
  • Current: 2.57 amps
  • Power: 300 +/- 10% watts

Product Reviews

Write A Review | Read all 4 reviews.
  So pleased I bought a second unit
Reviewed by: Satisfied customer from Grantsburg, WI

Our house is terribly dry and we've had all sorts of humidifiers to battle the dryness. I had always shied away from warm mist humidifiers because of the dreaded 'white residue' early models were famous for. I had heard Enviracaire solved the problem and was skeptical, but the thought of a warm-air mist unit was inviting so I thought I'd try one. I got our first EWM-300 unit toward the beginning of last year's heating season. It worked as advertised with no white residue. I run our unit at almost full output and get 24-hours worth of humidity per each fill. At full output, the unit does gurgle, but with the radio or TV on, even normal conversation, the noise is not noticeable. I clean the EWM-300 weekly, and that seems to extend the life of the unit. When I put it away at the end of last season, it looked almost brand new. The UV light which came with the unit lasted the entire first season and I replaced it at the start of this season. The replacement was a simple matter — and coming from a guy with all thumbs, that's saying something. The absorption pads which come with the unit last about two weeks, so you may need more than come with the unit to start with. I was so impressed with the EWM-300 last year, I bought a second unit for the second floor of our home this fall. I am a notoriously light sleeper, at least when I'm trying to get to sleep, so initially I was concerned the gurgling from the upstairs unit may have kept me awake. I have found that concern unwarranted — quite the opposite in fact. The gurgling is quite a restful noise and perhaps even helps me fall asleep.
  Enviracaire EMW-399 - the ultimate humidifier
Reviewed by: Bob A from Reston, Virginia

The Enviracaire EMW-300 Humidifier is an excellent humidifier that eliminates the white dust problem, is easy to fill, and is extremely quiet.
  Not quiet like the Slant/Fin
Reviewed by: Bob and Vicky in Colorado from Colorado

We already owned this version of the humidifier when it was sold by Slant/Fin. When Enviracaire took it over there were supposedly no changes. The look is nearly identical but there were no instructions included with the packaging and thankfully we already owned its predecessor so we knew how to clean and operate it. This unit is not as quiet as the Slant/Fin. The water gurgles louder and more often as it operates. Overall we are quite satisfied with the product and it performs well.

Customer Q & A

Q1: Is it ok to fill the tanks with warm water on a EWM-300W humidifier?
A: Yes.

Q2: Can I buy a UV Bulb for a slant/fin humidifier model 210w?
A: Yes. The Enviracaire UV Bulb we have available fits nearly all Enviracaire humidifier models, including the 210W.

Read all Q & A

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Enviracaire Humidifiers Reviews
Enviracaire EWM-300W Humidifiers

The EWM-300W Enviracaire Warm Mist Humidifier is germ-free humidifier with a large capacity that puts more moisture back into the air than comparable models. This warm mist humidifier is designed for larger spaces with all the convenient features you expect of Enviracaire humidifiers. Running up to 24 hours per filling, the EWM-300W humidifier has an exclusive dual germicidal process to kill bacteria and other possible contaminants. Automatic shut-off when humidity level is reached and refill / reset indicator lights offer a no-hassle approach to operating your humidifier.

What I like about the EWM-300W Humidifier

This Enviracaire humidifier is great for allergy and asthma sufferers or those simply concerned with bacteria and viruses associated with stagnant water. The dual processes of boiling the water and treating it with UV light destroys almost all bacteria and microbes commonly found in tap water. These features make Enviracaire Germ Free humidifiers some of the most hygienic available.

The large, dual tank reservoirs hold over two and a half gallons of moisture than will last a maximum of 24 hours. Set at lower humidity levels, these large tanks will require only one filling for up to a 2 day period.

The medicine cup is a common, yet convenient, Enviracaire feature. For those use use vaporized medication, this is a major benefit.

What I do not like about the EWM-300W Humidifier

One drawback with this model is that, like many other warm mist humidifiers, it is only a warm mist humidifier. The water has to be heated to create the mist and this could be dangerous if tipped over by a young child.

Though the dual tanks increase the overall capacity of the unit, they can be a bit awkward to handle at time. So while moving or refilling the tanks, take care to not drop them.

Overall, the Enviracaire EWM-300W is a larger capacity humidifier that is one of the most hygienic available. The size of the tanks means no refilling more than once a day, and the dual germicidal processes give peace of mind while relieving the symptoms of dry air.

Why buy from AchooAllergy.com
AchooAllergy.com Customer Testimonials
My son has always had a nagging cough when the weather gets colder, that persists all winter long. The Vornado Humidifier  seems to have helped him feel better, and I don't hear nearly as many late night coughing fits. Thanks!
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Humidifier Resources

Additional Resources

Enviracaire Humidifier Maintenance
Compare Humidifiers
Humidifier Buying Guide
Humidifiers FAQ
Benefits of Home Humidification
Using a Humidifier


3 Year Limited Warranty


EWM-300W Warm Mist Humidifier (Item#: SL0001) (Discontinued)

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