Pure Guardian H910BL Ultrasonic Cool Mist Humidifier, 14 Hrs. Run Time, 210 Sq. Ft. Coverage, Small Rooms, Quiet, Filter Free

I bought this to use for an elderly cat who had recently been suffering from allergies, which was causing a condition known as reverse sneezing & also some asthma attacks. My vet had recommended getting a vaporizer or humidifier to use where he sleeps to alleviate his symptoms and lung irritation. I had a humidifier & that helped, but it is a warm steam variety (not good in the heat of summer when the a/c is blasting in other rooms) and automatically shuts-off once the max humidity is reached (so it won't run continuously).I found this little cool mist vaporizer & have been very pleased with it. It was much smaller than I had thought it would be, even after reading other reviews & seeing the pictures. But it is sufficient & puts out a nice, constant stream of cool mist until the tank empties. It has about a 6' cord, which I wish was a little longer, but I guess that's what extension cords were invented for! It works virtually silently as well, which is nice so it doesn't disturb the cat (& also would be great for a nursery as well). I use refrigerated distilled water & haven't noticed any kind of build-up at all, or any white powdery residue. I have it on a tile floor, and while the floor around it does feel cooler to the touch, there is no moisture from the unit accumulating that I have noticed.The very top can be twisted to direct the mist flow. The on/off button has a small, unobtrusive backlight - blue when it is on & red when the tank needs to be re-filled. That one button is the one that cycles through the 4 combo modes. The blue nightlight feature lights up inside the water tank itself. It can be used when it is in either the low or high mist flow setting. I guess some people think it may be too bright, but I didn't find it any brighter than any other nightlight I've ever used.I think it only holds a little less than a quart of water at a time (per the manual, precisely .21 gallons), and on the low setting found it would run for about 10-12 hours I think, so enough to run through the night. The tank itself will be hard to clean - the opening is fairly small & the manufacturer recommends a bottle brush. The tank does have some coating to help resist build-up in the interior. There is a tiny brush snapped into the base, to be used to gently clean the ultrasonic disk. The only other recommended method of cleaning that part of the base is with a small amount of vinegar/water solution to help remove any build-up from the disk (without scraping or scrubbing it, which will damage it).So far it has worked great for its intended purpose. My cat's breathing has definitely improved (asthma attacks stopped!) & this is better than using the warm steam humidifier in the summer months. I'll switch back to that in the fall/winter. Hopefully this will stand up to daily use in the meantime - will update review if there turn out to be any problems later.

The media could not be loaded. This is a great compact cool mist humidifier for someone looking for something to have on while they sleep. It's not good for continuous use or to humidify a large room. It's really compact, which is nice, and consists really of only two parts, the top reservoir and the bottom base unit. It's easy to fill and once filled, all you have to do is turn over the reservoir and put it on the base. No further "locking in" required.It has 4 modes: 2 low mist modes and 2 high mist modes (each with and without nightlight). The nightlight seemed very bright to me, so I keep it off. There is a small "on" light that stays on while the unit is on (and turns red when it's out of water). I thought I'd be bothered by this light, but was not. But if you're bothered by any light at night, this probably will annoy you.Two great features it has that I was looking for: auto-off when it's out of water and an anti-microbial feature they call Silver Clean, which should prevent mold and mildew. You'll still have to clean the unit, and to do so they've cleverly included a brush in the base.I used it last night on high and it lasted about 8 hours. I'm assuming to get the full 14 hours you would have to have it on low. I experienced no leaking and absolutely no sound. It's pretty much silent.I highly recommend this humidifier for use while sleeping. Watch video for demonstration of how it works.

This is a great humidifier but probably not for the reasons most use it. It's actually the second one we tried in the last couple weeks. The first one was larger but it leaked, and that's never a good thing. I had also tried one from a local store, but it wasn't going to work out the way we needed either. This one is perfect! It's just smallish, so we need to fill up at least once a day, sometimes twice depending on how long my daughter lets it run.See, this is actually for her new pet iguana, who apparently needs a moist, rainforest-like atmosphere. I had looked at contraptions that were specifically for reptiles but they all had really bad reviews. I saw where someone made one out of a regular humidifier and figured if that was possible, then I could figure it out, too.What makes this unit well suited for that purpose is the nozzle is not tilted or uneven like on so many models. It's pretty flat on top so I could glue the plumbing pieces right on and there's no leakage (so far) around the nozzle. To fill it up is not a total pain. Yes, it would be nice if that could be done without lifting the thing out of the base, but none seem to work that way. The clear tubing I put in is just removed and then we can lift it freely out. You can hopefully see in the photo the mist going into the cage.We have not tried this on the higher setting but on the lower one, it seems to run on a single tank of water. One time, we lost track of time and it ran out, but it did stop as it was supposed to. It would be nicer if there were a knob that turned because, otherwise, you have to remember how many times you pressed the button. The first two are low, second two are high, and the difference between each is with or without light.At first, the low setting emitted an annoying buzzing noise but that seemed to go away once it ran a bit and now it's quiet all the time. This started to be a concern because soon Thing will be moved into the living area and I didn't want to have to ensure a high pitched buzz for him to have mist.

Got this for our first baby and loved it so much we got it for our second. The first one did quit working after five years, so we bought it again. Perfect amount of humidity for a bedroom on an average night. We do pull out the big one for illnesses but this is our everyday humidifier.