Review of pureguardian FLTDC Humidifier Decalcification Filter for H1500

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List Price: $19.99
Sale Price: $12.24
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I know that ultrasonic humidifiers leave white dust. However, this filter is supposed to eliminate that problem. I've tried these types of filters in other ultrasonic humidifiers (Crane for example) and they work. But this one, does nothing. What a shame. We love the humidifier, but wish the filter actually worked. It's a lot of work to clean up the dust all the time. Especially on drapes, curtains, etc.

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I may be wrong, but I expected that this filter would retain the minerals from the water so they did not get into the air during the humidifier process and are seen as a white powder on furniture, floors etc. Unfortunately this filter only slightly limited the amount of powder which escaped into the air, not prevent it. The name itself suggests that the minerals are removed during the process. I was very disappointed and would like to know where I can get a filter that really works. This is better than nothing, but still not good enough to do the job.

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While $17 every couple of months seems a little expensive for this item, I would pay it if it worked. As far as I can tell it does not help prevent the dust at all.

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It's not the fault of the filter (which explains the stars), but if your city uses lime water softening, also known as Clark's process, this will not help.

In fact, if you have lime-softened water don't even buy an ultrasonic humidifier. I wish I'd known that as it put lime dust over the entire room and ruined an expensive CD player (lime dust got on the lens and can't be cleaned off).

Lime softening is done by your city, not by your water softener. Check wikipedia for "lime softening".

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I own a pureguardian™Ultraonic Humidifier H4500. I was using tap water and noticed an accumulation of white dust on many plastic surfaces around the house including the dvds inside the player. I switched to distilled water and the problem went away. I ordered this decalcification filter in hopes that I would save money from buying distilled water. I installed the filter as resumed the use of tap water and the white dust problem came back just as before. I am returning the filter as is does not work at all.

I have found that the "Water Filling" machine at my local wal mart uses reverse osmosis which works great in the humidifier as it does not produce any white dust, and the price per gallon is extremely reasonable.