CleanAirKits - Triple Exhalaron
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Reddit Reviews:
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Based on 1 year's data from Feb 25, 2026 How it works
Liked most:
3
0
"It's really effective for larger sq footage rooms"
"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."
"Actually more effective than most commercial air purifiers because it moves much more air."
8
0
"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."
"It's really effective for larger sq footage rooms"
"It makes a load of difference in air quality"
3
1
"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. ... 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."
"it’s barely audible on high"
"They are super quiet"
4
0
"PC fans and Box fans are made by dozens of different brands and can be purchased anywhere - Walmart, Amazon, Home Depot etc. ... HVAC filters are cheap, efficient, and abundant. ... These purifiers do not lock you into one brand and all parts are user replaceable. ... 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."
"The box fan was $20 and the filters are $40 every couple of months. ... They're inexpensive"
"It's simply several MIRV-13 furnace filters taped to a cheap fan."
7
0
"The box fan was $20 and the filters are $40 every couple of months. ... They're inexpensive"
"the filters only need to be changed every 6 months or so ... we can get them for cheap when they go on sale"
"they're cheaper and more efficient than commercial air filters"
Disliked most:
3
1
"tolerate a decent amount of noise though"
0
1
"you need to be able to build and rebuild them"
Legitimate_Ocelot491 1.0https://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.
SurvivalistLibrarian 0.3If you're driving a car that you own, then upgrade the cabin air filter to a HEPA filter if you haven't already. Keep the car's fan running as it brings it quite a bit of fresh air. I've seen this ventilation keep the interior's CO2 levels near outdoor air levels or just above even with 2-3 people in the vehicle. Then I've used a Clean Air Kits Exhalaron in the middle of the back seat to mix/filter the air that's farther away from the vents.
bookittymew 0.1Look up corsi-rosenthal boxes. I just built one last week and I'm way happier with it than my levoit.
Catapooger 0.1Corsi-Rosenthal boxes are what they're called! I have a lot of allergies and I use one of those. They're great.
Combat__Crayon 0.1How handy are you? A Corsi-Rosenthal box is pretty easy to construct out of a box fan and 4-5 filters. Or I've seen ones that use 2 filters and some computer fans that run quieter.
ConBroMitch2247 0.1Corsi-Rosenthal box. Many people love them on this sub, if done right. They’re great! Although I believe you’ll want a MERV-13 at a minimum. :)
Creepy-Tangerine-293 0.1Its ugly as sin and huge, but I made a CR Box and it is the best HEPA I've ever owned. They were invented during COVID to help reduce viral particles in the air but they have proven useful for any kind of indoor air quality improvement like fire smoke, dust, allergies, etc.... [https://engineering.ucdavis.edu/news/science-action-how-build-corsi-rosenthal-box](https://engineering.ucdavis.edu/news/science-action-how-build-corsi-rosenthal-box) Editing to add the other helpful thing (besides replacing furnace filters regularly) has been to increase vacuuming. I got a really great vacuum - a Miele C1 - and I've noticed much less overall dust since I got it and started a regular vacuuming rotation.
Disgusted_Mac_Lifer 0.1This 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.
Duke_Of_Halifax 0.1Corsi-Rosenthal box. You can make one yourself, or buy the kits. The ones with computer fans are wood or metal and will last forever, and because it uses MERV-13 furnace fans you only have to replace them every few years.
FreeDogRun 0.1Depending 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).
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