Blueair - Mini Max Air Purifier, 2-pack

That is an absolutely SHIT product and it's shameful Costco is selling them. You see how it says it cleans the air in a 432 ft² room in 60 Minutes? That means it's actually rated to clean a 100 square foot room, at best, when it's on high. It's an utter garbage product and shouldn't exist. They're only produced to take advantage of people that don't understand air purifiers. Introducing something like this into your home with have an extremely negligible impact on air pollution, while raising the noise pollution in your home. Again, on the loudest fan setting, it's rated to clean a 100 square feet room. $120 at Costco is about the least you can spend per bedroom, and it will be loud. You need to spend more on a larger unit if you want to turn the fan down to a reasonable volume. I've got severe allergies and starting using air purifiers in the 90's, and you're going to need to spend a big chunk of change if you want clean air at a low volume level, and it's going to take up quite a bit of floor space.

For whatever it is worth, purchased this two pack for $100 from Costco “blue pure mini max” to put in our less inhabited rooms of the home. We have coway in primary living spaces. https://www.costco.com/Blue%20Pure%20Mini%20Max%20Air%20Purifier,%202-pack%20By%20Blueair.product.1896710.html?COSTID=iosapp_25.8.2&TRACKING=NO&adobe_mc=TS%3D1755361137%7CMCMID%3D47448641111624073557868459186739136500%7CMCORGID%3D97B21CFE5329614E0A490D45@AdobeOrg&sh=true&nf=true

I have one in a 14x10 kids room and it’s been great for two years. The winix ones are better for more space

Box fans with filters are cheap and foolproof and BIFL or close to it, but if you want something prettier I’ve had good luck with the BlueAir from Costco. Dead simple and effective in bedrooms.  https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box https://www.costco.com/blue-pure-mini-max-air-purifier%2C-2-pack-by-blueair.product.4000339230.html

I have them and have had two other blueair purifiers for a couple of years. To quote from another reddit thread on the same topic: Blueair air filters meet CARB (California Air Resources Board) certification standards, so they emit less than 50 parts per billion of ozone as an upper limit. It seems that some people feel there is no safe amount of ozone generation and claim adverse health effects (lung/throat irritation) but this will be specific from person to person. Knowing Costco has a generous return policy, why not get it and if it makes you feel worse then return it?

Own Levoit 400 for our main living area (1,100 sq ft apt), the smaller one in our bedroom (toddler sleeps with us). Had them prior to Covid and love them. I vacuum the filters when I can per the manual. I got my mom the blueair 311i max because she was closer to one of the “minor” fires here in LA and she loved it so much she got the mini for her bedroom along with my dad’s (they sleep in separate rooms lol). I ended up getting the mini to bring to work.

This particular model is designed for a 100 sq ft room. You would probably need to run both purifiers on the highest setting all the time to cover even a small 400 sq ft studio, and that would be kinda noisy. These are not designed to clean an entire apartment, just a single room. You can put them in a single room and close the doors and windows to that room to get the best filtration possible. Just make sure you still have a little ventilation (like a ceiling vent or leaving the door cracked open a bit) if you're planning to do it for a long period of time so that you don't get too much CO2 buildup. If you are cleaning the air with the purpose of removing pollen, close your windows. If you were running them to clean viruses out of the air, then leaving the windows open would improve ventilation, so that would actually help. However, if you are running them to help with allergies or wildfire smoke, then keep the dirty air outside so they can do their job on the air that's inside. According to BlueAir's marketing, their HEPASilent filter is supposedly even better than a HEPA filter. I'm no expert but in my experience they work at least as well as HEPA filters. I like them because they're quiet, cute, and effective. I can see all the junk in the air that got trapped in the filter when it's time to change the filter out. If you want to run just one machine on a quiet setting, then look for one that is rated for the size of your apartment.

I bought this two pack. Love them. Really quiet.

Again another vote for Blueair, I have the max mini for our bedroom and whilst it isn't smart so doesn't show in Home assistant I do have it linked to a window sensor so it only comes on when the bedroom window is closed, but also set to run during the night regardless. Works well and definitely helps with the dust and makes the air feel cleaner.

I just bought them too! They’ve been great so far.