Honeywell Up to 99.999% Germ Free Warm Mist Humidifier

I'VE ONLY HAD THIS ONE FOR A COUPLE OF DAYS BUT SO FAR IT HAS PERFORMED VERY WELL AS FAR AS PUTTING MOISTURE INTO THE AIR ALSO IT IS VERY QUIET AAA IN MY BOOK.

If you want a reliable, warm-mist humidifier that you plan to run continuously, this is a good choice.  I have been happy with mine since I got it 4 months ago.  I run it 24 hours a day, and I refill it once a day.  

You do have to make time weekly to clean it properly.  I do this by lifting off the water basin, pouring out the remaining water and the mineral pad from the base, and pouring in diluted vinegar or CLR.  Leave this overnight; in the morning, you can gently scrape the remaining mineral deposits from the base.  

I would also recommend cleaning the basin separately every few weeks by doing the following: pour out any water, put in a few drops of bleach, add several cups of very hot water, screw on the lid and shake the whole thing vigorously for several minutes.  Then you can pour it out, rinse it well and let it air dry.  

It is difficult to find a product with all of the features I want but the HWM-500 Warm Mist, Germ Free humidifier is the closest I have found. The only flaw in the one I received is an empty indicator light that comes on frequently when the unit is not empty, but Customer Service has offered to ship me a new unit when they receive back the one I recently purchased (at no additional shipping cost to me). I am experimentally turning down the humidity adjustment a little more each night until no condensation appears on the window panes; I am almost there! An automatic standby state when a desired humidity is reached would be great (that is, a true humidistat with a sensor rather than just a humidity control). The increased humidity definitely makes the 73-degree room temperature feel warmer. The UV light is a great assurance that we won't be breathing in bad creatures. And my upper respiratory passages and mouth are no longer dry and irritated. I plan on ordering a second unit with the promised15% discount coupon I will receive from writing this review. Thank you for a fine product.