CleanAirKits - Triple Exhalaron

https://www.cleanairkits.com/products/exhalaron Or https://www.cleanairkits.com/products/triple-exhalaron-stylish-compact-for-medium-rooms I had one in my old econobox and it cleaned up the car inside air super well during all the bad air days we’ve had. Runs off USB-C so I plugged it into a USB cigarette lighter adapter.

Replying to this late but the most efficient AND quietest air purifiers are the ones made with PC cooling fans from cleanairkits.com . I have their Exhalaron and it’s barely audible on high

As others have mentioned, build yourself a Corsi-Rosenthal cube or get a cleanairkit that uses MERV 13 filters. I'm severely allergic to dust and dust mites and I have been astounded at the amount of dust my cube picks up. We even bought a 3d printed frame for ours off of Etsy so it looks a bit nicer than a bunch of air filters with tape. I've had one running in my home continually for 2 years. Equally if not more important: get rid of every shred of carpeting and decorative rugs in your home. I have a small rug under my desk chair to protect my hardwood floor and that is all.

My wife built two of these for our house. She despises dust. They work pretty well.

One is in the front door foyer to blow up the stairs. The other is in the living room. We have a dog that sheds a lot and that's where he spends much of his day.

Look up corsi-rosenthal boxes. I just built one last week and I'm way happier with it than my levoit.

They work. Most are over priced though and the filters cost an arm and a leg and are where the profit is at. Most people could get away with a Corsi-Rosenthal Box, connected to a smart plug and turn it on when they cook for a drastic improvement in indoor air quality for cheap.

This is true. Web-search for a "Corsi-Rosenthal box." Actually more effective than most commercial air purifiers because it moves much more air. It's simply several MIRV-13 furnace filters taped to a cheap fan.

Depending on where you are you can spend way less and get good stuff. It really depends on how dirty the air is and how clean you want it. **H**(igh)**E**(fficiency)**P**(articulate)**A**(ir) filters are good because they capture more particles than others. Below them are MERV filters rated 1-16, and [as you can see here](https://www.epa.gov/indoor-air-quality-iaq/what-merv-rating) anything less than 12 nabs under 80% of PM2.5 and imo isn't worth it. These are also more common in home HVAC from what I've seen as well - for mobile units, it's either HEPA or "HEPA-type" which means nothing. If you want the most efficient unit and to spend next to no money, [Corsi-Rosenthal boxes](https://corsirosenthalfoundation.org/instructions/) are the way to go - you need to be able to build and rebuild them, and tolerate a decent amount of noise though. Otherwise, the size of your rooms matters. BlueAir, Coway, Honeywell, Lasko/GermGuardian, Levoit, and Smart Air are some brands that are reputable and have a range of units and sizes. Keep in mind most purifier marketing advertises performance on only the **highest** setting, while advertising noise on the **lowest** setting. Most makers do not have data on other settings, though there are rare exceptions [like Medify](https://medifyair.com/collections/air-purifiers/products/medify-ma-40?variant=39663322628163).

The best? Really? You really want the best? Here you go: https://aghealth.ucdavis.edu/news/corsi-rosenthal-box-diy-box-fan-air-filter-covid-19-and-wildfire-smoke this is the absolute best air purifier, backed by science. And cheap too. I have one too.

You want something genuinely good and cheap? Make a Corsi-Rosenthal Box or two.

If you don’t have an air purifier you can make a corsi rosenthal box for cheap. Or you can make a more efficient one using pc fans (we have one of those. They are super quiet, super cheap to run and the filters only need to be changed every 6 months or so. Plus we can get them for cheap when they go on sale). It makes a load of difference in air quality.

The Corsi-Rosenthal box is a fabulous option for folks on a budget. It works great and literally saved lives during the thick of the pandemic (you need a higher rated air filter for removing viruses). You want to balance air flow with filtration. Obviously the higher the filter rating, the harder the fan is going to have to work to pull air through, so you want to use the lowest rating for the stuff you want to filter out: MERV 8 is good for regular dust/pet dander, pollen; MERV 10 will catch smoke particles; MERV 13 is going to filter out virus sized particles. Also $$ for higher ratings. Some filter shapes are more expensive than others, but you can use corrugated cardboard (apartment building recycle bin, or liquor store for good free cardboard) and tape to fill in gaps and make the cheapest filters work.

I built a Corsi-Rosenthal box for $60. It doesn't look pretty but it works really well for our small house at that price range. 

Try a Corsi-Rosenthal box first. See if it makes an impact in your house. Then invest in a proper air purifier that is sized to process the air volume of your house at least 3-4 times a day

If you're looking to collect dust - you should make a Corsi-Rosenthal box. A HEPA isn't going to process enough air for really getting rid of dust. If you don't want to make one yourself, or want a nicer aesthetic, check out Clean Air Kit. Here's an [informative video](https://youtu.be/gaQTYrisieA?si=mjj8lAmHywe_exSu) on this topic.

Yep, the only right answer. https://corsirosenthalfoundation.org/instructions/

A box fan, tape, and a MERV 13 furnace air filter. Really! [Tutorial on how to create the filter from the University of Michigan](https://youtu.be/kH5APw_SLUU?si=RlMVyuw7oxgbx8cZ) A bit more of an advanced “model”: the [Corsi-Rosenthal box](https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box) [Study done on different versions of the diy air purifiers](https://ncceh.ca/resources/evidence-reviews/do-it-yourself-diy-air-cleaners-evidence-effectiveness-and) Anecdotally, I made one of these for less than 35$ and within days it cleared up my cat’s allergies! I noticed a big improvement in air quality, especially during the dry seasons while living in the desert.

I love the ugly-ass Honeywell tower one i have. You can get washable filters too, which is a nice money saver. It's relatively quiet and powerful. Everyone should make at least one Corsi-Rosenthal box though because they are super effective!

"Corsi-Rosenthal Box" is the way to go if you don't care about aesthetic. It's really effective for larger sq footage rooms

Anything with a HEPA filter and appropriate CADR for the space it's being used in will work. Corsi-Rosenthal boxes (made out of box fans and furnace filters) are pretty cost-effective and perform really well.

budget budget, build a corsi-rosenthal  otherwise, get a coway airmega. it's a little pricier than some but it has a carbon filter which is great for smells. prefilter catches a lot and saves wear and tear on the hepa panel

Look up a Corsi-Rosenthal box. The modern world has a ton of cheap, reasonably high quality air filters built for furnaces in every hardware store. The cost of high end air filtration vs what a CR Box can do is pretty silly unless you're allergic or have money to burn. There are even designs and builds specifically to be more permanent than the intial construction method so you can spend 50-75 bucks on parts, then just swap filters and have something that works for like a decade.

I've had quite a few air purifiers, most fans use bearings and bearings will eventually fail. I've had one purifier that's 7 years old and still running, but another failed after 2-3 years. I'm switching my air purifiers from Hepa to Corsi-Rosenthal boxes, though I'll probably still use small hepas in critical rooms but not sure. I'm looking at Clean Air Kits, 3D Handyman, AirFanta, or the NuKit Tempest. Corsi-Rosenthal boxes use Merv 13 or higher HVAC filters and usually a box fan, but people also use PC fans. Here's why this is a better choice for people who want to buy it for life. 1: PC fans and Box fans are made by dozens of different brands and can be purchased anywhere - Walmart, Amazon, Home Depot etc. 2: HVAC filters are cheap, efficient, and abundant. 3. These purifiers do not lock you into one brand and all parts are user replaceable. 4: Efficiency - because the filters are more efficient, it requires less energy to pull air through them. PC fans use DC motors, which use 1/10 of the energy and are much quieter than AC motors. They're also are engineered to be virtually silent. HVAC filters benefit from economies of scale and are cheap to replace. Since the whole system is made from replaceable parts, you won't ever have to throw it all away just because a model got discontinued or a brand went out of business. Many people think HEPA is the gold standard and there is no doubt if sized appropriately they filter air quite well. The problem is to get them to work you need to either run them at full speed all day or buy a huge and expensive unit that you can run at half speed to get a reasonable CADR. Surprisingly, data shows that Corsi-Rosenthal boxes are just about as good and that's because they can achieve higher CADRs, and a greater number of Air Changes Per Hour. The filters do not clog as quickly and can filter large volumes of air quietly which means you will leave them running all day. To get the same amount of air cleaning power one unit achieved with my winix 5200-2 I'd have to run it at turbo mode and it's just way too loud. Plus the corsi rose thal box built with pc fans pulled 8 watts vs the winix pulling about 60 at turbo. My electricity rates in CA are super expensive and it saves hundreds of dollars a year in energy and filter costs to go with a Corsi Rosenthal box. This is the video that convinced me this was the way to go: https://youtu.be/gaQTYrisieA?feature=shared Air filters are really just extra insurance - you'll do a lot more good with a solid Hepa vacuum cleaner and frequent vacuuming, as well as keeping up with your HVAC system's filter changes. You should run your HVAC fan a few hours a day to help filter massive volumes of air quickly.

Make a corsi rosenthal! It can really help.