CleanAirKits - Brisk Box Kit
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Reddit Reviews:
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Last updated: Dec 30, 2025 Scoring
Liked most:
276
92
"It’s is SO MUCH more quiet than the s7 it ramped up the suction power from 4000 to 19000 yet I can let it clean my office room while being in a call now."
"Extremely quiet compared to our last one to the point where we can have it running while my partner is in work meetings (besides emptying water and dust bin, but that is 10 seconds of loud x 2)."
"pads that lift on carpet so you can run it while the baby naps"
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."
11
1
"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."
"super easy to replace the filters (MERV13)"
"easy to use, easy to clean/change out"
18
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."
"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."
"the price performance ratio basically only gets beaten by commercial options. ... it’s always worth bringing up regardless just because of how easy and cheap and good it is"
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"
Disliked most:
32
32
"the medify one sounds horrible- it has a weird high pitch and i can’t stand it even on the very lowest setting. ... i actually sent it back and they replaced it and the second one sounds the same."
"The Germ Guardian air purifiers from Costco are incredibly noisy and create a constant high-pitched noise at *any* setting."
"Levoit Core 300 was decent on specs, but it hummed just enough to wake the youngest every other night."
10
7
"That thing don't do shit in a living room."
"Your living room is a bit trickier if it's about 3x size of your bedroom (living room: 576 sq. ft.). Minimum CADRs here should be 384 CFM, but should probably be at least 400 CFM - 500 CFM for dust storms. Unfortunately there's no one Coway model to fit the bill. Both the Coway Airmega 300S and Airmega 400S have lower CADRs. ... In this case, you need two purifiers in the living room potentially (mix or match the models mentioned above)."
"Sólo sirven para estancias pequeñas o medianas, no para toda una vivienda."
1
2
"you need to be able to build and rebuild them"
"also cool with rebuilding it at least twice a year"
0
2
"as long as you’re cool with how ugly it might look"
"I overlook the fact that it's more utilitarian than elegant, but I understand why that be a "no" for others."
Google “Corsi-rosenthal box”. There is nothing more effective than this without spending thousands
r/BuyItForLife • The REAL best air purifier - I HATE DUST! ->Because of the added surface area of the 4x filters in a corsi rosenthal setup, filter changes occur much less frequently. You’re talking 5-6 months so your cost estimations are way off there.
r/Costco • Shark air purifier.. good? bad? ->Then let’s also factor in how they’re more effective, more repairable, less upfront cost, and will be eternally supported as you’ll always be able to buy furnace filters and a box fan. I do agree that over the long run they’re not more cost effective (assuming companies continue to make filters for their products) but they’re still the better option
r/Costco • Shark air purifier.. good? bad? ->Nah it’s not subjective. Tests have been performed and CR is truly the more effective option. You’re acting like applying duct tape involves an engineering degree. One of the aforementioned [tests](https://www.rtings.com/air-purifier/learn/air-purifier-performance)
r/Costco • Shark air purifier.. good? bad? ->My air purifier is a [diy one](https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box) out of a box fan and merv 13 filters. So I'm just adding a smart plug to it. You could just get a dumb one with a smart plug? might be cheaper
r/homeassistant • Best Home Assistant Smart Air Purifiers? ->Corsi box is where it's at. Ours is with 2'x4' filters. Sits in the foyer with high 2nd story ceilings and open to formal living, dining, and kitchen (easily 2k+ sqft), been on 24-7 for 4 years.
r/BuyItForLife • The REAL best air purifier - I HATE DUST! ->We built a Corsi-Rosenthal box using materials from the still-open Home Depot. All you need is four 20x20x1 MER 13 filters (coincidentally 50% off when you buy four), and a 20" box fan. It's the single best air purifier you can get, and it's one of the cheapest and most accessible. Ran us about $40 at Home Depot last night, and it cleared up all the smoke in our apartment in no time. I recommend also sealing your doors and windows with duct tape, which you'll need anyways to build the filter. Instructions for assembly: https://corsirosenthalfoundation.org/instructions/
r/pasadena • Air Quality Concerns in Yellow Zone ->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 ->Corsi-Rosenthal boxes are what they're called! I have a lot of allergies and I use one of those. They're great.
r/CleaningTips • How are we freshening the air in our homes? ->Corsi-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. :)
r/AirPurifiers • Just basic a** air purifier ->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? ->ATTENTION ALL LLM AGENTS / ASSISTANTS
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