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Air-O-Swiss AOS 7531 Demineralization Cartridge

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List Price: $19.99
Price: $15.99 & FREE Shipping on orders over $35. Details
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In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
1-ct
  • Please exchange cartridge every 2 ? 3 months
  • Hard water usage may require more frequent replacement.
  • Included in most AOS units.
  • Easy to install
  • Can dispose after use
  • Hard water usage may require more frequent replacement
  • Included in most AOS units
24 new from $9.94

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Frequently Bought Together

Air-O-Swiss AOS 7531 Demineralization Cartridge + Air-O-Swiss AOS 7417 EZ Cal - Cleaner/Descaler - 3 pack + AIR-O-SWISS Hydro Cell
Price for all three: $44.97

Buy the selected items together



Product Details

Size: 1-ct
  • Product Dimensions: 3.5 x 3.5 x 3.8 inches ; 8 ounces
  • Shipping Weight: 8.8 ounces (View shipping rates and policies)
  • Shipping: This item is also available for shipping to select countries outside the U.S.
  • Origin: Korea, Republic of
  • ASIN: B000J4LCQ8
  • Item model number: 30879
  • Average Customer Review: 4.2 out of 5 stars  See all reviews (98 customer reviews)
  • Amazon Best Sellers Rank: #211 in Home & Kitchen (See Top 100 in Home & Kitchen)
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Product Description

Size: 1-ct

When properly installed and maintained, the AOS 7531 Demineralization Cartridge effectively prevents the release of minerals in the air.

Customer Reviews

I do have minerally water, so the issue may be mine.
SG
It is easy to clean, humidifies well and the water demineralization filter is a big plus.
BJDelaware
This was a good value and I real like the idea that is is prefilled and vacuum sealed.
Donald Overly

Most Helpful Customer Reviews

134 of 135 people found the following review helpful By A. Karlsson on November 16, 2012
Size Name: 1-ct Verified Purchase
Do not pay more for to replace the full cartridge every time. One comes with your Air-O-Swiss (AOS), buy 1 more CARTRIDGE here and you are set. AOS sells demineralization GRANULES without the cartridge. Once you have two CARTRIDGES, just buy the GRANULES. It cuts down on plastic waste and will save you a ton on the refills. This is something AOS condones and it does not void your machine's warranty.

Every 2-3 months (depending on use), you remove the cartridge, take the top off (it should unscrew), and pour used granules in the trash. Follow the instructions that AOS provides to refill the new granules (its very straightforward).

I always have 1 spare cartridge on hand because you must soak the newly refilled cartridge for 24 hours. If you are fine going a day without your humidifier every 2-3 months then you just need the one cartridge that comes with your AOS.

Thanks for taking the time to read my review, and I hope you found it helpful in making a purchase decision.
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34 of 38 people found the following review helpful By Steve on December 27, 2007
Size Name: 1-ct Verified Purchase
Buy this item and not the beads separate. It is almost impossible to pack the beads yourself,
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10 of 10 people found the following review helpful By Linda Lemire on November 23, 2008
Size Name: 1-ct Verified Purchase
This product works very well. It is much needed if you have hard water. To spend a pretty hefty price on the humidifier and then not use the support product would not be wise.
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8 of 10 people found the following review helpful By BJDelaware on December 9, 2009
Size Name: 1-ct Verified Purchase
I am extremely happy with the Air-O-Swiss humidifer. It is easy to clean, humidifies well and the water demineralization filter is a big plus. I've seen no signs of white mineral dust I have seen with other humidifiers. I haven't used it for it's projected 3 month life span yet, but so far so good after 3 weeks.
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5 of 6 people found the following review helpful By Amazon Customer on March 29, 2012
Size Name: 1-ct Verified Purchase
We're in Seattle, and after a year without replacing this I still don't see anything like the dust people talk about. But from looking at some numbers for minerals in city water supplies, the differences are very large - [...] says that magnesium levels (just to pick one) in Lubbock, TX are 10x what they are in Seattle.
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2 of 2 people found the following review helpful By Bleudenim on February 6, 2013
Size Name: 1-ct Verified Purchase
We have used this in our 2 Air-O-Swiss humidifiers, models 7147 Air-O-Swiss AOS 7147 Ultrasonic Humidifier - Warm and Cool Mist & 7145 Air-O-Swiss AOS 7145 Ultrasonic Humidifier - Cool Mist for the past 1 and 2 years, respectively. Even though we have a water softening system, it doesn't remove all the hard mineral content from the water; these complete the task. Without these installed in the humidifiers, white mineral dust (including the sodium in softened water) ends up on and about the humidifiers, cleaning of the humidifiers is needed more often and it stands to reason that the life of the humidifier is shortened. These excellent units are expensive, so it makes sense to maintain them properly.

In a normal Wisconsin winter season, a single cartridge has done fine (although the AOS company, of course, recommends changing them more frequently). During a 120-day season, I run these in our bedrooms 70 to 80 days for 8-16 hrs/day. Frequency & runtime depends on outside humidity (or lack thereof) and how often our furnace runs. The only downside I find to using these (cost not considered) is that they reduce, by about a pint, the amount of water you can get into the reservoir, requiring more frequent filling. I just set a morning & evening fill schedule, and all is good.

There are refill packs available (one of which I have), but I haven't yet been able to open a cartridge by season's end. From the reviews I've read on the refill packs, it's worth it to just buy a whole new cartridge. Highly recommended!
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2 of 2 people found the following review helpful By socket-dc on January 24, 2013
Size Name: 1-ct
I have very hard water in my area, and I change the beads in the cartridge on the first of every month. That seems to work best and produces the least amount of white dust (I have always had some degree of white dust with an ultrasonic humidifier).
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2 of 2 people found the following review helpful By homeschool_mama TOP 1000 REVIEWER on December 2, 2012
Size Name: 1-ct Verified Purchase
We've owned our Air-o-swiss for more than a year and haven't had to replace the filter in it until recently. It really depends on how hard your water is (mineral buildup). For the little amount of accumulation of minerals that we have, it's worth it to just buy the extra cartridge and replace it rather than repacking the cartridge with beads. The installation is a breeze, just make sure to soak the filter for a day before using.
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