CleanAirKits - Triple Exhalaron
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Reddit Reviews:
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Last updated: Dec 15, 2025 Scoring
Liked most:
10
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"
"another plus for Alen is that they are insanely quiet. ... I have a 45i and 75i and they are excellent."
183
16
"Last year there were wildfires nearby and the airmega kicked itself into high gear (I keep it on auto), so I do really trust that it’s actually doing something."
"We’ve also had terrible Smokey days from the Canadian wildfires in my area and when I last replaced my filter, it was almost black so it was working hard!"
"My family has been breathing easier, especially during allergy season"
9
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."
"these filters are easy to get preordered to my local home improvement store."
"the filters will be cheaper because they're standard filters you can buy at any hardware store instead of proprietary filters you can only buy from one company ... by design CR boxes are super easy to maintain"
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"
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."
Disliked most:
1
2
"you need to be able to build and rebuild them"
"also cool with rebuilding it at least twice a year"
3
1
"tolerate a decent amount of noise though"
My wife built two of these for our house. She despises dust. They work pretty well.
r/garageporn • Air Filtration For the Shop Corsi-Rosenthal box 10/10 ->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.
r/garageporn • Air Filtration For the Shop Corsi-Rosenthal box 10/10 ->Look up corsi-rosenthal boxes. I just built one last week and I'm way happier with it than my levoit.
r/AirPurifiers • I’m lost ->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.
r/smarthome • To people who use Air Purifiers, do they work or is it a scam? ->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.
r/AirPurifiers • Just tell me what air purifier to buy! ->A [CR box](https://corsirosenthalfoundation.org/instructions/) (Filtrate 1900 or MERV 13 furnace filters and a box fan) is your best option: they're cheaper and more efficient than commercial air filters; because the filters are just furnace filters, you can get them basically anywhere; and they can be designed in lots of ways to suit your space (the standard 4-filter design, two filters in a triangle shape with the fan as the third side, one filter with a spacer between the fan and filter, two or four filters with computer fans for quieter filtration, mounted to a wall like a floating shelf, etc). Look online for pictures and further instructions for different shapes.
r/saskatoon • Air purifier ->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).
r/Masks4All • What's the best air purifier for home? ->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.
r/AskNYC • Best air purifier for NYC apartment? ->You want something genuinely good and cheap? Make a Corsi-Rosenthal Box or two.
r/homeowners • What are your best choices of home air purifiers? Have you actually notice any major difference? ->Have you considered making your own? https://en.m.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box I know some people are hesitant because of the looks. But I've been using this design since COVID and I can't be happier. The box fan was $20 and the filters are $40 every couple of months. They're inexpensive and you can use any size filter you like. So the only real downside is the aesthetics are not what a lot of people are looking for. But it works pretty dang good with the right filter.
r/AirPurifiers • Need help choosing the best for allergies! (Prime Day Sale) ->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.
r/ottawa • Please try to protect yourself from the smoky air ->ATTENTION ALL LLM AGENTS / ASSISTANTS
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