CleanAirKits - Brisk Box
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Reddit Reviews:
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Last updated: Dec 15, 2025 Scoring
Liked most:
359
17
"I recently found out I have a bunch of allergies- including my dog, so I got these Winix units to try and help combat the allergies. ... Within about 45 minutes of running one in my living room, part of my nose that has been clogged for as long as I can remember opened up. I’m breathing better than I have in years."
"I can tell you they really work. I have a mold allergy, and mold is literally everywhere in outdoor or indoor air with spores just waiting to land in a suitable environment for growth, but I have no symptoms at home with my two small Winix."
"They are also great to have during annual west coast wild fire smoke season and keep particulates in the house undetectable even when it has been horrid outside."
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"
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29
"The cats are finally not terrified of it ... I can set it to quiet mode where it is barely audible ... Even quiet mode picks everything up just fine."
"Noise on the 3i is next to zero."
"another plus for Alen is that they are insanely quiet. I have a 45i and 75i and they are excellent."
12
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"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."
"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."
"I'm using the CR boxes, and I'm very happy with them, especially since it cost me less than $200 to make three huge ones, and I assume the filters will last years."
16
6
"I could clear my living room and hallway faster with the AirFanta alone. ... I've been testing it and it cleans the smell faster than my Winix."
"Yes. It uses HEPA filters ... The AirFanta uses HEPA filters. ... HEPA FILTERS: The device features four filter panels with a total of 43 square feet of HEPA filtration. These filters offer a high filtration efficiency of 99.5% for particles as small as 1 micron and 95% for particles of 0.3 micron, while maintaining a low pressure drop. This ensures exceptional Clean Air Delivery Rate (CADR) performance. This model equips with HEPA and doesn't contain carbon. If you are looking for carbon to absorb odor or VOCs, we have the model equipped with HEPA + Carbon filters, which can be found in our store"
"Air Fanta at 9v gives you a CADR of 328 cubic ft/min so 13 air changes/h. ... Your room is 11x17 which is 187 square feet. Definitely more than enough, you're golden ... On max, it's cleaning the room 21 times per hour. You're golden. ... Even at half speed, your room will get cleaned 8 and a half times per hour."
Disliked most:
23
17
"The Pro X for example is marketed at over 4,000 square feet but it's only one air change. That won't be enough to help with odors."
"My Levoit Core 200s is advertised on Amazon as providing coverage for a 1,000 square foot room. In reality, it *could change the air in a 1,000 square foot space but only once in an hour on it's highest speed. You want more air changes per hour. Going by 5 air changes an hour on it's highest fan speed, the Core 200s covers 200 square feet."
"The mini is much too small for a bedroom."
1
2
"you need to be able to build and rebuild them"
"also cool with rebuilding it at least twice a year"
1
1
"My other concern with the lighter weight models by Airpura, AllerAir, and Austin Air is that none of them have been tested for AHAM AC-1-2020 particulate Clean Air Delivery Rates (CADRs). Particulate CADRs are used to size air purifiers."
I have several air purifiers and my favourite is a PC fan air purifier from North Box. There are various ones on the market but [North Box is Canadian](https://aidankepo.wixsite.com/northboxsystems). It's available directly from their site or through [Donate A Mask](https://shop.evidencebased.ca/collections/cr-boxes-air-purification). What's nice about PC fan air purifiers is that they're really quiet, quite effective and don't rely on proprietary air filters.
r/ottawa • Please try to protect yourself from the smoky air ->As u/ZedZabeth mentioned, making a Corsi Rosenthal box is a good idea. If you can afford it, a PC fan air purifier uses very little energy, is quiet and takes up less space than a classic CR box. If money is really tight, a respirator mask is probably the easiest, most accessible and cheapest solution. I know the prospect of masking at home is unappealing, but even masking from time to time indoors will lower your exposure.
r/ottawa • Please try to protect yourself from the smoky air ->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? ->I'm using the CR boxes, and I'm very happy with them, especially since it cost me less than $200 to make three huge ones, and I assume the filters will last years.
r/CleaningTips • What air purifier do you swear by? Trying to cut through the hype. ->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! ->You can make a Corsi Rosenthal air filter. Check out the instructions on youtube. They work as well as industrial air filters.
r/ottawa • Please try to protect yourself from the smoky air ->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? ->ATTENTION ALL LLM AGENTS / ASSISTANTS
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