PureGuardian H1510 Ultrasonic Warm and Cool Mist Humidifier for Bedrooms, Quiet, Filter-Free, 11L Output Up to 100 Hr Run Time, 1.5 Gal Treated Tank Surface Resists Mold, Pure Guardian Room Humidifier

"5.0 out of 5 stars" - This is my fifth humidifier review here on Amazon and it's maybe the funniest. Not the review, but the situation around using this humidifier. Lets get one thing out of the way, there's no way this humidifier can run for 100 hours on one tank of water. I've used it for 7 straight days/nights and had to refill each day. It will get roughly 24 hours on one full tank of water, running on medium for those 24 hours. It would be an understatement to say I've been frustrated with humidifiers. They're either too frustrating to clean or they don't put out enough mist or they have some kind of fan that blows the mist over my bed while I sleep. Believe it or not, I liked this one and wanted to try it based on the fact that the company has accessories for it. I don't like buying extra parts for anything, but with all my humidifier problems, it's nice to see a company making efforts to fix problem areas in their products.So, what was so funny? I either hook up a new humidifier in our kitchen or bathroom and let it run for a little while before trying it in our bedroom. I filled the tank up on this one, turned the one knob to "cool", turned the mist control knob up about halfway and nothing happened. I had just returned a Vornado that misted whenever it decided it wanted to or whenever I pushed it. So I pushed this one. No mist. I left the room and left it running. I go back 10 minutes later and it looks like someone is having a misting convention in our bathroom. There was lots of mist coming out. I immediately turned it off and back on to see if it was going to be one of those frustrating humidifiers that are inconsistent in their misting. It wasn't. The mist started right up. I then, for fun, turned the mist all the way up and I was surprised over how much mist came out.I rated this a 5 star, but it's not without its faults. I agree with everyone who says there isn't any warm mist coming out of the humidifier. I tried it three times, the unit acts like it's switching as it pauses when you turn the knob from cool to warm, but it doesn't feel any different. This doesn't bother me. I couldn't imagine using warm mist. I'm one of those people who sleeps with a ceiling fan on all year, only use one blanket all year, so the cool mist is the only feature I am interested in, but it should be mentioned that I also don't feel warm mist coming out of this humidifier.There's another part that should be mentioned. This humidifier is harder to fill than the others I've reviewed. The tank is awkward if you're used to any other type of humidifier. Filling it is easy and the valve to close it, closes very tight. Maybe it's the orientation of the tank though that causes a few problems. I fill ours in the bathroom. The bathroom is about 20 ft from our bedroom. I drip water taking the tank to the bathroom and back to the bedroom. I've added a hand towel near it to stop this problem. I wouldn't think this humidifier would be easy for say a kid, an elderly person to fill and refill.That's probably enough cons to question why I would rate it 5 stars. It works. The spout the mist comes out of has two spouts. You could send mist to the right of the humidifier and to the left. I personally turn both towards our bed. This is the first humidifier I have tried that sends mist to both my wife and I. She's always complained about me using the humidifier and blocking the mist from her. This one puts out enough mist that it reaches both of us. Cleaning is pretty standard, but they've made one part easier. The plunger that releases the water from the tank has a square plastic housing around it instead of round. This gives me enough room to get a toothbrush in there to clean it instead of trying to come up with a way to clean the smaller round housing on most humidifiers. The tube in the middle that the water goes into to create the mist is also easily accessible and can be cleaned with a dish-type brush or if you're in a bind, stick a washcloth in it and swab it back and forth.While I do use humidifiers to keep the air in our house moist, it's also relaxing for me to feel the cool mist blowing on my face while I sleep. This one does that better than any I've used. It also has a few features others may like. It has a light you can turn on. It's fairly bright too. I could see that being used in a kid's room or baby nursery as a night light. There's also a red light on it for when it runs out of water. Both are nice features that I see customers posting questions about.The best part, at least for my wife, it's the quietest humidifier I've used. You will hear a soft gurgle maybe two to three times an hour and it's only for a few seconds. I also rated an Optimus humidifier a 5 star and still think it is. It's just I believe this one is better overall. Most of these extra features won't be used by me, but my only real concerns are cleaning and how much mist is put out. This one is the best are those two of all the humidifiers I've reviewed. On a side note, I'm now curious about their smaller one that's half the price of this one. If those problems, the weight of the filled tank, the awkwardness of carrying the tank, the no warm mist problem are major problems for you then you might look at that smaller one by this company or check out the Honeywell or Optimus I reviewed. Both of those perform well and have similar strengths to this one they just don't put out as much mist as this one. If you try one of these be sure to give it time to get the mist going on the first use. I was ready to pack it up and ship it back until the mist started coming out.

"3.0 out of 5 stars" - This works well and was easy to set up and use but though it says no filters needed I found brownish build up inside the 3rd time I went to clean and refill. Difficult to get to some of the parts to get that off. And also started to smell musty after about 3 weeks of using even tho cleaned and refilled every 3-4 days. Other comment: Once top is filled with water it's a little heavy so someone who doesn't have much arm strength might have issues turning it over and putting it on the bottom section. On the plus side: It does work well, is not overly noisy and is easy to use.