0ur opinion: :Compact and unobtrusive, the Honeywell HWM255 quietly humidifies a room with an area of up to 350 square feet, providing comfort in very dry environments. Geared to provide up to 3 gallons of daily output, the tank itself holds about 1-1/2 gallons of water. This helps keep the unit size relatively compact so you can conveniently place the HWM255 virtually anywhere in your room. A built-in humidostat advises how much moisture has been emitted. There's also a built-in timer so the machine only works when you need it, great for maximizing comfort and saving energy. Auto Shut 0ff turns the device off when out of water. Honeywell's EZ-Care system makes filling and emptying really simple. The water tank is dishwasher safe for quick and thorough cleaning.
Features and Benefits: Automatic shut-off at desired humidity or when unit is empty EZ Care System - Easy to fill, carry and clean Dishwasher safe medicine dispenser Replacement Filter - No replacement filter required Dimensions - 16.00 x 13.25 x 10.50 inches Weight - 8.0 pounds Warranty - 5-years limited warranty
Testimonials
Average Buyer Rating:

Buyer's feedback: 
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* HORRIBLE AND ON MY 2ND UNIT. ...
The first one broke, i returned it to the company under the warranty. They sent me a new one, and this one lasted a couple of months and now, it won't turn on. Furthermore, the heating elements builds up all kind of hard minerals and it becomes caked on the heating unit. Same with my old unit. No way to remove, they claim using vinegar but that doesn't work. Stay away from these units. Besides, i don't think Honeywell is going to give me a 3rd replacement.
Buyer's feedback: 
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Pretty good humidifier
I have had several humidifiers over the years. This is one of the better ones I have had. It works well, is VERY QUIET which is important as we use it in a bedroom. I would not use it in a really large room say over 20x20 because of it's water capacity but it works just fine for us. I like the ability to set humidification in percent using the display. Ah the display it is hard to see in anything but bright light, but that is a minor flaw. I often wonder why displays on equipment like this are not backlit, I mean this is not a battery operated device so what's the problem? Buy the way it does not hold 3 gal.(it can dispence 3gal.in a day) only about one, but even on high that gets you through the night.
All things considered we are certainly happy with this humidifier.
Buyer's feedback: 
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* misleading advertising/listing ...
Overall, I'm happy with it (been almost 2 weeks), but they bill it as "3 Gallons" but as the other reviewer said, it is not a 3 Gallon Tank, but 3 Gallon output per day. It also says it is a dishwasher safe tank, but actually it is the medicine cup that is dishwasher safe - the directions clearly state to ONLY clean it with bleach.
I still like it, and it works well, but sometimes I think the humidity reading is inaccurate (on the low side). I know my apartment is really dry, but it often can't even get up to 30% humidity, yet it feels quite tropical in the room...
Buyer's feedback: 
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A Honey of a humidifier
This really puts it out. It is easy to refill and operate. We use it for large areas in our Southern California (very dry a lot of the time) home. It can also be turned down lower for smaller rooms.
Buyer's feedback: 
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* Simply the easiest and QUIETEST humidifier around ...
This is simple to use and reliable. The library quietness makes it all the better. I have had others that can make a high hissing noise when you raise the humidity controls. Long lasting is another key factor. Getting another before I can't find it again!