Some of HEPA filter units put the carbon behind the HEPA filter, and some put it in front. The Vornado has the carbon as a pre-filter, saving the expensive HEPA portion for particulates. I find I change the carbon filter rather often, and so a four-pack for me is a sensible idea. I absolutely notice when the carbon has loaded with whatever muck is in the air. Then it's time to install a new one, which is not terribly difficult. I'd rather not have the HEPA filter pick up volatile components from the air, so I'd say this pre-filter works very well.
So I was dismayed when I opened the latest box of presorb filters and discovered that they are of very poor quality-half the thickness of the presorb filters I'd been getting and transparent!
We're all struggling to survive in a bad economy and I can understand cutting the cost of production, but I was pretty disappointed to see this. I'll probably use up my remaining supplies and go shop for some other brand of air purifier.
Buy Vornado AQS 15 Replacement PreSorb Filter Now
These came rather quickly and are exactly as described. Each filter is sealed in it's own bag so they stay fresh while in storage. I've heard that the AQS 15 filters are being discontinued so I'm going to bite the bullet and stock up as I go through these filters at a rate of 1 pre-sorb filter every 2 months.Read Best Reviews of Vornado AQS 15 Replacement PreSorb Filter Here
Overpriced but they work. I guess I should be glad I can still purchase them. They do not seam as durable as the previous replacements I purchased a few years back, which survived several cleanings.Want Vornado AQS 15 Replacement PreSorb Filter Discount?
I have had my Vornado for a little over 10 years... This Presorb filter is great. Gets rid of most smells and extends the life of the Hepa Filter. For $15 for a 4 pack. It's a great value.Save 24% Off
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