Winix One Year Ultimate Washable Filter Cassette; (fits size 21 models plus P300, U300, 5000, 9000, 9500)DetailsWinix WAC9500 Ultimate Pet True HEPA Air Cleaner with PlasmaWave Technology FREE Shipping. Buy "Winix One Year Ultimate Washable Filter Cassette; ...” from Amazon Warehouse Deals and save 53% off the $119.99 list price. 18.4 x 14.4 x 4.4 inches 3.3 pounds (View shipping rates and policies) #9,484 in Home and Kitchen (See Top 100 in Home and Kitchen) #2 in Home Improvement > Power & Hand Tools > Power Tools > Dust Collectors & Air Cleaners I have two WAC9500s from Amazon: one from 2011 and one from 2012. This NEW cassette fits perfectly in my old Winix WAC9500 Ultimate Pet True HEPA Air Cleaner with PlasmaWave Technology. I don't understand why other reviews had problems.Here's how to tell the old design from the new: the new Winix cassette #114190 is black, while the old cassette is light grey. The new also has black tabs on the front, which the old grey lacked.

The new black cassette is a perfect replacement for the light grey cassettte.In short, if you have a Winix WAC9500 Ultimate Pet True HEPA Air Cleaner with PlasmaWave Technology, this is the perfect replacement cassette!hitachi air purifier ep-a3000 reviewThis new cassette is actually a slight improvement over the older one as you now have black tabs to make installing and removing the filter from the purifier easier for maintenance and cleaning. honeywell air purifier 21500It is also much easier to see dust and hair on the black pre-filter.holmes air purifier 2400I don't feel satisfied that Winix had to go and do this change, other than to force people to buy new cassettes, however this new cassette itself is a good product, which is why it justifies the 5-stars.

Girl of the North Exactly the one I needed! Filter is expensive but it makes all the difference since my unit performs as good as new. Fit in my wac9500 like a charm. Good price as well. Fits great and easy to use I have the 9500 model and this fit my machine. The handle does not match the location where the handle inset is on the machine, but it doesn't matter as you can push the filter... just started to use it, so have no idea how good it will be, hopefully as good as they say I have two of the Winix 9500 air purifiers and this is the exact same filter that Winix sends out from their website. It was even in a Winix box. These are expensive but great. I have two Winix air cleaners, have pets and I need to buy new filters once a year for each. THE best air purifier for allergies of which mine are VERY bad. Have one in my bedroom and also find SO much less dust on the tops of my bureaus! Less dusting for me !!!!! If you are already a seasoned Winix user, you can skip through the text by scanning for your

Some air purifier lines don't really need a filter buyer's guide, but I wouldn't say that about Winix, where numerous buyer reviews express frustration and misunderstanding concerning replacement filters. Korean air purifier maker Winix has prospered in the US market by offering good value and superior quality relative to Chinese competitors. To remain competitive on price, Winix wisely cuts features (as opposed to cutting quality), and evolved a dual feature strategy for the product line. Each of three chassis/bay sizes, Size 17, Size 21, and Size 25, are offered as economy models and separately as premium ("ultimate") products. The primary difference is the filter trains. Economy two-filter setups, which I will refer to as "value" packages, leave substantial empty space in the filter bay, while Ultimate Cassette systems fill it with a plastic frame ("filter cassette"), add a lot more carbon, some additional antimicrobial treatment (not recommended here), and a permanent washable fiberglass prefilter screen.

The issue for me is the substantial price differential Winix charges for the Ultimate packages, when laser particle counter testing has demonstrated very good particulate removal using their value filter train (with tape-sealed HEPA edges and additional prefilter material added). Ultimate Cassette systems, photo at right, will NOT accept value filters without removal of the cassette. Numerous users have tried to force the slightly larger value HEPA into the Ultimate Cassette frame, I guess I need to add "NOT recommended." Some user reviews say they have attempted to cut down the value HEPA to fit the tray, a huge NO-NO! To retain the Ultimate package, users MUST buy the whole bundle every time. Again, there are NO individual replacement filters available for the Ultimate packages. Downgrades are permissible, but Ultimate Cassette users can NOT substitute the cheaper filters without discarding the screen prefilter and cassette tray, and accepting the reduced odor capacity of the value package prefilters.

OK, maybe I repeated that enough times. Of course, value system owners could theoretically upgrade to $120 cassette systems for their $200 air cleaner, maybe a few do. Winix value filters, photo left below, are sold as bundles of one HEPA and four antimicrobial prefilters, forcing users who may not have odor issues to buy prefilters. Four-packs of prefilters are available, but are unfavorably priced. Winix, despite great products and undeniable success, has difficulty communicating effectively with American consumers, their instructions tend to be cryptic. Ultimate Cassette systems just slide in to replace the old tray, but value set-ups MUST have the HEPA in back with one prefilter fitting into a depression and lip of the HEPA, in the front ("prefilter"). Many users are installing the prefilter in back. One consumer review admitted to installing all 4 prefilters at the same time (a year's supply when changed out every 90 days, yes, they will fit).

Winix smoothed entry into the US market with a series of re-branded marketing deals. Winix standard-sized chassis and filter bays were sold, with different front covers, as Kenmore, Electrolux, and now Fellowes air purifiers. Cross-fit filter applications are common, see "Fellowes" below. Very expensive Ultimate replacement filters, and pricey value filters, tarnish the economy image, with many filter buyers searching for alternatives. I find the nearly-empty filter bays of the Winix value models ideal for experimenting with performance enhancing/money-saving extra prefilter combos. Many Winix owners were confused by the company's dual filter descriptors - size ("Size 21"), which refers to the filter bay size, and a six-digit part number ("115115") which identified the specific filter. While Winix has stopped using the 6-digit part numbers, they are still used by many vendors. But now Winix identifies filters by model series names: FresHome, PlasmaWave, Signature, and Ultimate Pet.

FresHome Series and PlasmaWave models use value filter trains, a HEPA with a single prefilter. This filter set, sometimes referred to as Model 21HC4, fits all Size 21 filter bays, but is specifically sold for: #115115, Winix Size 21, MSRP $79.99 Also fits Winix air cleaner models 9000, 9500 (must scrap cassette tray), 5000 (remove cassette), 5500, 5000B, and Electrolux EL491A. This HEPA filter measures 12 5/8 inches wide, by 16 3/8 inches tall by 1 1/4 inches deep, just a bit too big to squeeze into cassette trays. The 115115 Size 21 package has one true-HEPA with 4 odor prefilters, and sells at Amazon for $54 to $67. This is the "washable" HEPA, something I said would never work, part of the "permanent HEPA" marketing fad of a few years back. User reviews say this filter begins to deteriorate after a couple washes. PlasmaWave 5500 owners could install the standard Size 21 value package, #115115 (above), dropping the washable HEPA experiment

and its $50 higher price tag. The washable HEPA filter is available for about $71 at amazon; PlasmaWave 5500, and other Size 21 users who need more that four prefilters for each HEPA (smokers, pets, etc.) can buy the #115119, Size 21, carbon filter 4-pack. At amazon, price is around $57; Fellowes HF-300 HEPA, for a re-branded Winix purifier (AP-300), (Fellowes filter part number 9370101), is exactly the same as Winix size 21 HEPA, part number 115115. I recently ordered the Fellowes filter, which ships WITHOUT the 4 prefilters, and installed it in my Winix 5300. The Fellowes version cannot be distinguished from the Winix #115115 HEPA, and tested well with my laser counter. The "Fellowes" version (HEPA filter only) goes for $23 to $30 at amazon: The Size 25 value replacement filter set fits FresHome P450, and can be used to downgrade the Winix Signature U450 to a value filter train by discarding the cassette tray and permanent Winix #113250, Size 25, Replacement Filter Set

FresHome P150 uses Winix #113050, Size 17, HEPA and 4 prefilters, MSRP $59.99. Size 17 also fits Winix 9300 and 9000S. A user experiment, reputable but not personally verified by me, suggests a successful match of Fellowes HF-230 HEPA and Winix Size 17 chassis. "I have both the Winix P-150 air purifier and the Fellowes HF-230 replacement air filter with me and they are a perfect fit: the (Winix and Fellowes) filters are indistinguishable from each other." Amazon sells the Fellowes HF-230 (HEPA only) for around $29.99; Winix Signature Series and Ultimate Pet Series ship with Ultimate Cassette filter trains. Within the last few years, Winix made a few minor changes, tabs and indentations, to the Ultimate Cassettes and changed the color from gray to black. Signature U300 uses #114190, Size 21, Long Life Washable True-HEPA Filter, MSRP $119.99. 114190 is a full cassette with added antimicrobial treatments, extra carbon with zeolite, and a washable permanent prefilter.