Air-O-Swiss AOS 7147 Ultrasonic Humidifier - Warm and Cool Mist

Quiet, accurate but difficult to fill water tank
The 7147 is the quietest humidifier we have ever owned. It has easy to read digital controls, and the humidistat stays within one degree of one that also hangs on the wall in our bedroom. The filters do their job nicely and the warm mist setting keeps the room from feeling clammy.

The only issues I have with this humidifier is the way in which it is refilled. The oddly shaped top tank lifts off the pedestal control base and the refill opening is on the bottom of the tank. When you lift the tank off the pedestal daily to refill water drips everywhere as the tank sits in a pool of water. You then flip over the tank and remove the fill cap, which also happens to be connected to the filter! When you pull the filter out (which is filled with water) it drips everywhere! You then hold the oddly shaped tank upside down to refill. Since the top is now the bottom, and it is not flat you cannot set down the tank to refill. You also must contend with the nozzle where the mist...

Whisper quiet & accurate humidity control. Highly Recommended!
We have been so pleased with the performance of the original Air-O-Swiss AOS 7145 Ultrasonic Humidifier - Cool Mist in our 300 sq.ft. bedroom that we decided to upgrade and put the 7145 in our son's room. The AOS 7147 is identical to the 7145 with some excellent additional features. I love the controls that provide; readings of the current humidity level, ability to set the desired target humidity level, and the ability to pre-heat the water to improve efficiency.

The one thing about which I have a minor complaint is the mist output level control. The 7145 has a dial control that allows for a continuous adjustment of the mist output. The 7147 touch controls provide only 3 absolute settings: low, high & high+. Frankly, I prefer the continuously variable mist output control of the 7145.

We are relegated to using well water which pretty much "eats up" wicks in evaporative type humidifiers,...

Does the job, quietly
Researching humidifiers on Amazon was a somewhat tiresome exercise. Almost all products I looked at are subject to very serious complaints, most importantly noise, leakage, and lack of reliability. I decided to go with the AOS 7147 because most reviewers agree that it is really quiet, and because I liked the clean look and the features.

Here is what I can report after about a week of usage (will update if anything changes over time):

Noise level: Both my wife and I are extremely noise sensitive, but this unit can operate in our bedroom without affecting our sleep. Yes, there is a bit of a humming noise, but it is barely audible. Also there is a bubbling noise once in a while when water flows out of the tank into the tray. All-in-all, it seems about as quiet as can reasonably be expected.

Effectiveness: We use the auto setting that lets the device decide the target level of humidity and the output level. This works very well and hassle free, keeping the...

Click to Editorial Reviews