SPT SU-3750 Ultrasonic Penguin-Shaped Humidifier

Goofy-looking but effective and QUIET
I went looking for an affordable ultrasonic humidifier because I was tired of noisy fans and the other problems associated with evaporative machines. After a lot of research, I decided to try this one, partly because of its simplicity and partly because of pricing (i.e. not a disaster if it didn't work out). I was a little dubious about the small reservoir size, but it's not a problem at all. To keep a rather large room at ca. 35% in the dead of winter in MN (very dry subzero weather), one fill will last a bit over 24 hours, and of course longer than that in less extreme conditions. It's perfectly simple to fill and clean, and wonderfully quiet--just a steady hum that I barely notice, with occasional little glurps.
So far I've only seen a little white dust on the device itself, but not on nearby surfaces. The vapor seems to circulate best (i.e. up and out into the room) when it's placed well off the floor. On a 30" shelf, the vapor tended to flow downward, so I used a milk...

Great humidifier
I like to make it short
Pro
1) Quiet
2) put out just right amount of mist for my 20 x 16' bedroom
3) Cheap and good looking design
4) Filter-less - save money on filter

Con
1) White dust build up if using tap water - 2 days of using it
2) Expensive if using distilled water as recommended by manufacturer- $1/day - I used distilled water for 3 days and it is free of white dust

I ended up using filtered water after 5th day instead for cost saving, but I have to let it stand for 24 hours before I fill the tank up just to let the fluorine getting out. This works best me.
No more white dust, no more frequent trip to grocery store for distilled water, and best of it, no filter replacement but just my drinking water filter only

Super quiet and no filters!
I have been using this humidifier for several nights. It is so quiet that you barely know it is on. The mist is very fine and gentle. I have had no problem with leaking or condensation. I have always used distilled water in my humidifiers because we have very hard water in our area. So, I really have no need for an expensive filter. It is super easy to fill and use. Plus, it has the added bonus of being really cute! I also just ordered the pig shaped version for another room. SPT SU-3751 Ultrasonic Pig-Shaped Humidifier

I was looking for a very quiet humidifier for a bedroom. I had purchased a different brand (Hunter) humidifier because the box says that it is supposed to be "ultra-quiet." It has a much more forceful motor and puts out quite a bit of vapor, which may be useful in certain circumstances. But it sounds like a big truck motor compared to the quiet little penguin.

Click to Editorial Reviews