Customer Reviews

Pure Guardian H4500 120 Hour Ultrasonic Humidifier

5 star:		(21)
4 star:		(7)
3 star:		(7)
2 star:		(10)
1 star:		(12)

 

 

When I first moved to the high mountains (8400') of Colorado, I used a wick-type humidifier constantly. I also had a nasty little cough that stayed with me for 18 months. Finally, I took my doctor's advice and junked the humidifier. End of cough, due to things growing in the unit. I have been shopping for humidifiers again for a while, and found them all to be lacking severely. Either they were the same type of filter construction that had caused my illness, or they were cheaply made, or low-capacity. This unit may have a tippy storage tank when turned upside-down to fill, but it is well made. The screw-on cap for the reservoir is sturdy and has a rubber gasket. There are carrying handles on the top and bottom of the water container to make it easy to manage, and it puts out a LOT of humidity. At 2/3 setting, it ran the humidity in my bedroom from 22 to 35% the first night, all while being completely silent. The (silent) piezo-electric ultrasonic element is the same as is used in the tweeters of my big PA speakers, and these are practically indestructible if kept clean. The huge water reservoir does mean that it is big, and the styling is retro, which is OK, I guess. More expensive units from the same manufacturer have useless and noisy digital features with the same overall construction. Overall, a solid five.

I bought this humidifier because it seemed perfect:

1, Large capacity - 2 gallons or so lasts about 24 hours and isn't too heavy to re-fill

2, Cool mist OR warm mist capability - I prefer warm mist, but the heating elements usually take too much cleaning

3, Virtually silent operation - no loud fans, just the occasional bubble from the reservoir

4, Nice design

5, Great reviews - durability and performance were both praised

6, Germ prevention - not sure this is strictly necessary with a warm mist humidifier (boiling water, etc), but apparently a nice to have for cold mist humidifiers.

Believing this justified the cost, which is 2.5 times more than any other humidifier I've ever bought, I bought one. It worked pretty well for just less than 2 weeks. Then there was a loud popping noise and now it doesn't work anymore.

I will bother to exchange it for a new one, but I won't be buying any others from this maker. At the price, I would expect much greater durability (even the forty dollar humidifiers last a couple of years or so) and there should be an electronic humidistat so that you can regulate the humidity. This model only has a dial that seems to govern output. The model with a humidistat is twice the price (daylight robbery, instead of this one, which is merely standard burglary).

I'm upset with this product, but I'm even more upset with humidifier manufacturers in general. I know water and electronics don't mix, but what I'm discovering is that the only genuinely bulletproof humidifiers on the market are the buckets of water with fans ("evaporative"). Really?? That's state of the art for you guys? Can you at least hook up with Dyson and make the fans quieter?

--UPDATE--

I've now got a replacement and I've noticed a couple of differences: Firstly, the dial on the new machine does much more to regulate the amount of visible mist than the dial on my original machine. Second, the tank now lasts for at least three days instead of one or less. I already knew the original machine was faulty (it broke within 2 weeks), but based on this new information it looks like it was running at maximum, regardless of what the dial was set to. This leaves me with two important takeaways:

1, If you just bought the machine and want to know whether it's working properly, you should see a substantial change when you turn the dial, from almost no mist to lots.

2, Can the machine handle being left on maximum output continuously? I don't know, and after last time, I dare not risk it.

--UPDATE II: The sequel--

Well, the second unit that I received lasted the season and is now in storage, clean and dry. Cleaning is simpler than some of the humidifiers I've had in the past. There are no exposed tea-kettle elements, so it's just a case of washing in a weak vinegar solution. If it doesn't successfully start up again next season, I'll update this again. I will re-iterate that this humidifier is expensive. I expected it to work first time and it didn't. However, if it had I would have been as happy with this device as everyone else seems to be, so feel free to take my star rating with a grain of salt.

By the way, to partially address the comment I've had so far, this review only represents an n of 2 (not 1, smartypants). I think it's useful to tot up the star scores from all the reviews to get a reasonable proxy for the failure rate. For instance, if you do this for Samsung LCD televisions you get a 10% failure rate for a sample size that's approaching 1000. That compares pretty unfavorably with the other major marques like Sony and Sharp... but is borne out by what I've heard from sales people at electronic retail stores (ie, quasi-independent experts). Anyway, for this humidifier it's unclear because of the small sample size. At the time of writing, the failure rate looked like it was hovering around 20%, which doesn't sound great - until you compare that to the failure rates of other humidifiers!

Bottom line: if I need another humidifier, this is my benchmark and I'd definitely consider buying it again ... from a store with a great return policy.

--UPDATE III: Comparison with SPT SU-4010--

I recently purchased the SPT SU-4010 from Amazon, which is another highly rated cold/warm mist humidifier. I like it for many of the same reasons that I now love the Germ Guardian. The chief difference is the SPT model is quieter (virtually silent) but puts out less mist over the same time period and has a smaller tank. If your [bedroom] is under 500 square feet and you need a silent humidifier, I'd recommend the SPT SU-4010. The ion exchange filter in that model even minimizes the "glugging" that is often the loudest noise from these type of humidifiers. If you have a larger room, or are aiming to maximize the volume of water you can get into the air over a given time, I still recommend the Germ Guardian. Note that I cannot yet speak to the reliability of the SPT SU-4010, but Consumer Reports rated it very highly. Please refer to my review of that model on this website if you'd like to progress updates for that model.

This is our second humidifier we've purchased from this manufacturer. We originally bought the one with the alarm clock, which is a great product and now we decided to buy this one. It is much more powerful & keeps our house very comfortable. (the original one we bought is in our bedroom). It's definitely a benefit that you don't have to constantly buy new filters.

As reported in other reviews, this humidifier will leave a while film if the water used is not filtered or distilled. This film is not as benign as described in some other reviews (explanation below). If I had easy and/or inexpensive access to filtered water I would give this product 5 stars - it works great, virtully noiseless as advertized, and virtually maintenance free with there being no filters to replace.

I've got one at home and one at the office. The tap water I have access to at work is treated (clorine), but not softened, and it's likley rather hard considering all of the minerals in the water here. After a few days running in the office the white film appeared on nearly every dark surface in the room (especially computer keyboard, printer, phone). Then my printer in my office started malfunctioning, then our copier. The copier repairman discovered the white film inside the copier, fouling up sensors and causing malfunction. He told us we'd have to stop using the humidifier or it would continue to cause problems. I now know why I had to just spend $400 on a new office printer as well. This dust that is emitted from the humidifier can float through the tiniest of cracks and holes and can deposit on nooks and crannies everywhere - plenty of places you can't reach with a dust rag, much less a Q-tip. Pressurized air dusting spray does not seem to remove the dust effectively either.

I've got another at my home, 35 miles away, where our tap water is well water, which is untreated hard water. Here I've only noticed a small bit of the white film, on only a few of the darkest, shiniest surfaces. What appears on this humidifier that does not appear in the humidifier in the office, however, is a pinkish - amber colored slime mold / mildew on the bottom side of the reservior (visible only when you refill the reservoir). This is probably becasue this water is not treated with clorine, and this part of the humidifier is creating a perfect breeding ground for bacterias, mold, mildew, etc. I'm not sure exactly what this slimy substance is, or if it's presence in the humidifier raises any health concerns. So I'm going to deduce that my water at home has less minerals in it that can turn into this white dust. I'm not sure if clorine in city water could also cause this white dust as well.

The bottom line is, if your water is perfect, this humidifier is close to perfect. If your water is not perfect, you may have some serious problems with this unit, and I would not reccomend it. I would strongly warn anybody against using this in a room with electronic devices if they are not totally sure their water is filtered properly.

So we got this the winter/ fall of 2010 at our local wholesale club. We used it all winter. While it provided great relief from the winter woes, after a month or so, we realized the issues with this little guy. It's really more difficult to clean than it should be. More than any humidifier should be in fact. Filling it is a whole other headache.

The blue part is the water container. It's awkward to fill and then carry. Loading it on the base, is in my opinion, backwards. You carry it one way, but must rotate the entire filled jug, which is quite heavy, 180 degrees in order to get it on the base properly. Note: I'm a righty, maybe lefties have an easier time with it.

Now if that wasn't annoying enough, the cleaning is an almost pointless venture. You take off the blue container, which is probably empty by now, but might not be. So, you unscrew the 'cap' to the water container and begin to pour water out. You get to the very last drops and realize and good 1/4 cup will not exit the container. I've stood there shaking the bejesus out of this thing and still can't get it out! The issue with this: the device will mold and from what I saw, allow for growth of the orange bacteria, staph I believe. While I'm not worried, usually an issue where we live (it's really humid), so I just clean it really well with soap and water. While that works for the base, it doesn't work as well for the water container. You can load up some soap and shake it around, but even after rinsing I've found it's almost impossible, without outside assistance, to remove all the water. (which just allows for more growth of nasty yuckiness, plus a headache when putting away to store for the warmer seasons).

So, I have found one solution to solve both problems, cleaning the blue container and getting rid of all water to allow it to fully dry. (FYI the best way to ensure all bacteria has stopped growing, ensure completely dry before reuse) I dump in about 1 cup rubbing alcohol, replace the cap and shake it, 'bejesus' style, out of it. After about 15 seconds, I unscrew the cap and shake as hard as I can again to really get as much out as possible then leave it to dry out with the hole upwards. Not down, as would seem obvious with most things, this will not dry out with the hole down. (5 days later and that 1/4 cup still wasn't gone with hole down). I really recommend just putting it in front of a fan or small heater (very low heat, it's plastic and WILL MELT) blowing into the hole. That seems to work faster.

Lastly, but really not a function issue, just annoying, the BLUE LIGHT on the front is an always on thing. You can turn on a 'nightlite' but really with as bright as this things 'on' light is, you won't need it. Probably annoying for light sleepers. I am, but use an eye mask at night...

Would I buy this one again? Probably not. Not sure if I'd buy from this company again. I'll read Amazon reviews before I buy any other humidifiers.

I heat my house with wood heat and I needed two new humidifiers. After reading lots of reviews I liked this one because it has a large reservoir, it is quiet and it has the choice of cool or warm mist. After running them for a week they are great. The 2.5 gallon reservoir lasts all day and night set at about 80% setting. It is very quiet except for a little glug when the water drains into the unit. The mist is a little damp and could wet things where it falls, so plan accordingly.

The reservoir is not well balanced when filling but you get used to it. Cleaning is a snap and cleans up perfectly. The night light is too bright for a bedroom but the on/off light does enough of a night light for me.

Overall, I am very happy with these units and would buy them again.

I bought them from "Radio City Auctions" through Amazon and they came quickly and safely.

I almost bought this item online in December, but I didn't want to wait so I purchased it at BestBuy for $147. The next day I found it at Costco for $99 so I made the return excited to try out this highly rated humidifier. My wife was 5 mo pregnant at the time, and I was concerned about a low maintenance unit for our bedroom. I must say the unit was pretty easy to keep clean. My biggest gripe about cleaning is that they didn't use the same magic coating on the base that they used in the water container. The white base would get pink mildew at least weakly, so I wiped the area with peroxide swabs a couple of times a week. I have hard water, but I didn't have problems with it on the furniture (I did have some calcium build up on the outside of the unit) like others have mentioned. I was very cautious not to handle the all important 'disk' which is basically the heart of the unit. This disk is coated in what looks like brass or gold, and vibrates at 'ultrasonic' speeds creating the mist. Well after a month or so I noticed a slight darkening in the center of the dime sized disk, even though I had been using the small brush (the ONLY recommended cleaning utensil for the disk) mounted inside the unit. About 3 months in I decided to run some white vinegar through the base per the units instructions, which ended up being the kiss of death. After the vinegar treatment I still noticed the dark color on the center of the disk, so I pulled out the brush again. What I thought was a dark residue building up on the disk was actually the gold colored foil flaking off the surface of the disk, leaving roughly half of the surface of the disk un-coated. That was it I tried running the unit only to see a small fountain of water at the bottom of the mist chimney. Fortunately for me Costco's return policy is to take returns for ever (not on most electronics), and when I took it to the return counter I noticed the same model behind the counter having just been returned. I assumed this to be a funny coincidence, and was off to find a replacement in the store. Like so many things Costco no longer had the unit in stock, which is probably for the best. When I was leaving I saw a woman bringing back two of the exact same units. Four units within an hour? I will not be buying this brand again.

We wondered a bit about this product after reading a lot of reviews, but decided to buy it because we needed a humidifier and the price was right. We've had it running for several days now, and we are very pleased with it. The mist output is variable in quantity, and it can be either cool or warm. Some of the reviews we read said the warm didn't work, but I think they must have been expecting steam (which it doesn't do). The temperature of the warm is not a whole lot different from the cool, and you have to allow it 10-15 minutes in a closed room to take effect. The other comment that people had made was that the vents were at 180° from each other. Fact is, that you can turn the small one as well as the large one, so they can be adjusted to any direction you want. The tank has to be filled at the kitchen sink, but that's not bad because it sits upside down nicely supported by the walls of a double sink. The tank is heavy when filled, because it holds 2-½ gallons. With fairly high volume of mist, one tank lasted us about 48 hours. The mist from this is good enough that I have been able to sleep very comfortably without my nasal passages clogging up due to extreme dryness. I would highly recommend this product. It does what it is supposed to do. Don't forget to read the instruction manual!

From reading other reviews, these seem to be hit or miss.

You either get one that works, or you don't.

We, unfortunately, got one that did not work.

It was VERY NOISY; and because some reviewers said their unit was "quiet," we knew ours was broken. Ours sounded like a broken lawn mower.

We are returning it and giving up on this particular model.

For those of you who actually have a working unit, I would highly recommend using DISTILLED water to prevent sediment issues. And put a towel underneath the unit since the mist is very heavy. The "warm" mist is not warm; it's tepid at best.

I like the nightlight feature; but since the unit does not work, I did not want to pay this much money just for a nightlight.

So far so good !!!!.....a perfect 5 stars for me. No sound and pretty powerful. My apt. Is roughly 740 sq. Ft. And it covers it all. This is my first humidifier so we will see how it goes