Winix - C535/C909

If you have a Costco membership the Winix C909 is the absolute best bang for the buck. It has a much great air capacity than the 5500-2 which means you can run it at a low (not noisy) setting and still handle a good amount of air (general guideline is that you want at least 5 air changes per hour to have a real benefit from an air purifier). The C909 is the same as the 9800, but it is a Costco exclusive. It is $199 and comes with two years worth of filters.

Oh, I mean I don't mean to discount anyone else's experience with it either. I'm just adding to the sample size. Figure this sub has at least a few hundred Winix owners who can chime in and add to the sampling. I've just been using Winix for a while and replacement filters are cheap. I still have 3 original 5500's from Winix still in use today - which is nice because it generally shares the same filter dimensions (except thickness) as the 5300-2 and 5500-2 - letting me slap on the bigger pellet sized carbon prefilters (sized for the 5500-2) on all 3 of these models (edit: and the Costco specific C535 - that also has similar filter dimensions).

There's a guy who did a youtube video on it - essentially the same filters except some of the prefilter and filter depth area is different. Meaning - the carbon pellet prefilter WILL NOT fit the 5300-2/C535. Basically you can try putting the carbon pellet cartridge/rigid filter in - but the mesh prefilter that clips on won't be able to "clear" it and lock into place flatly. If you don't mind a bit of bending or don't care to have a prefilter - it'll "fit". - But the filter can "fall out of place" since nothing is clipping it in. If its installed and the unit is never moved or knocked, the filters will stay in place - suction alone at speeds 3 and above can keep it fairly in place even when knocked around. The C535 and 5300-2 are basically the same. The 5500-2 is where the differences start - since the 5500-2 basically allows you to run any filters you want because it has the filter depth area to hold anything. Performance wise, they "feel" similar; acoustically - you wouldn't be able to tell filter to filter which is which unless one was defective or had something lodged inside the fan. For full disclosure - almost every single unit except for maybe 1 of my C535's are refurbished from Winix (often resold through woot/meh) which is why I have so many. (Usually I get them for $69/ea or less). So the act of "refurbishment" might have saved me from any defective noisy units. That or my batch - all of my 5500/5300's are over 6 years old. A quick check puts 3 of my C535's at 2018 vintage - and these are my newest units of the "5500" series. Summary: \- Remote control differences \- Different Filter Depth acceptance (5500-2 is larger) \- C535/5300-2 is the same \- Same acoustic performance \- Same airflow performance \- Carbon Filter differences

Hey OP. I've owned several different air filters over the years and they've all helped a lot to lower the dust level and subdue my allergies. Even the cheap ones do shit. One thing is you have to clean the filters! The pre- filter gets dirty. Fills up with dust. I do like the Winix filters from Costco. The one I've got came with extra filters, which is really nice, cause the filters are like printer ink.

This question has been asked a lot recently. I really like the Winix from Costco, about $100 and then turn off ionizers (produces small amounts of ozone). I barely get dust in my house since we run a few of them throughout the house.

Multiple Winix from Costco. Significant difference. Hardly any dust in our house. Affordable. Turn off ionizer on them!

That will go on sale from time to time for $99. The winix c909 costco carries is a better air purifier, which was down to $160 last week. it goes on sale every few months. the advantage of the costco air purifier is they come with a set or replacement filters so you essentially can run for 2 years. In my brief time in this thread, the square/rectangular purifiers are better then the circular ones. The winix c909 was a little to big for my bedroom, so I got the coway 160 which is plenty for my room. You need to figure how many square feet you need to clean, and then provide you with 4 air exchange an hour. The more the better, as you can run at lower speeds if noise is a concern.

I use a couple of Winix air purifiers from Costco. I have also used a Shark 3 in 1 clean sense. Both have HEPA filters and work well and are also pretty quiet, no problem with running them while I sleep.

yup had my winix since 2017. runs 24/7

Winix from Costco. It works well and at around $150 it comes with a bunch of replacement filters too

We have a Winix from Costco. We got 3 of them for around the house. We love them!

Winix from costco. I've stress tested it during a wildfire that got within a few miles of my home. I do not recommend Blue Air. Its more expensive and less effective.