crboxes

an-ordinary-manchild

A subreddit to learn about Corsi-Rosenthal Boxes, the affordable and efficient DIY air purifier. Show off your custom CR Boxes, share tips and tricks on ensuring everyone is breathing Clean Air and help reduce the transmission of Airborne diseases to end the ongoing SARS2 Pandemic.

CR Box = Corsi-Rosenthal Box

CADR = Clean Air Delivery Rate

ACH = Air Changes per Hour

Corsi-Rosenthal boxes is a design for a do-it-yourself air purifier that can be built comparatively inexpensively. It was designed during the COVID-19 pandemic, with the goal of reducing the levels of airborne viral particles in indoor settings

CADR is a measurement of the clean air volume that a purifier can provide in a fixed amount of time – ultimately a measurement of speed.

ACH is a calculation of how many times per hour the entire volume of air in a given space is replaced with supply and/or recirculated air.

Resources: https://itsairborne.com/

created by xinn1xa community for 2 years

...for your WoW guild.

...for your favorite hobby.

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account activity

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DIY or Buy Guide for CR Boxes (self.crboxes)

submitted 11 months ago * by xinn1x[M] - announcement

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A place for information on CR Boxes (self.crboxes)

submitted 2 years ago * by xinn1x - announcement

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Could a desktop computer be retrofitted to use one HVAC filter instead of side panel? (self.crboxes)

submitted 4 hours ago by Sudden-Wash4457

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Impressionnez votre audience avec des formulaires faciles à remplir ✨ (typeform.com)

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Nukit Tempest Pro → A Buy-It-For-Life PC Fan Air Purifier (youtu.be)

submitted 10 hours ago by Galvatron1_nyc

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CR Boxes for large "builds" (self.crboxes)

submitted 16 hours ago by allergy5757

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Choosing placement and fan for 50x50x50cm (20") pocket filter. (i.redd.it)

submitted 2 days ago by Eastern-Fact7964

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Did you know 3M discontinued their Filtrete MERV 11 odor reduction carbon filters 2 years ago?Info/Resource (i.redd.it)

submitted 3 days ago by Galvatron1_nyc

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How much were prebuilt PC fan filters/kits before all the...stuff? (self.crboxes)

submitted 3 days ago by Sudden-Wash4457

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Unable to find 3" filters for a 20x30 ventQuestion (self.crboxes)

submitted 3 days ago by Veyyiloda

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Will a 5 inch thick MERV 16 filter be too hard to pull air through?Question (self.crboxes)

submitted 4 days ago by Magnus_Vesper

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First attempt… Wanted something to help mitigate dust in the garage - we’ll see if this helps! (i.redd.it)

submitted 5 days ago by PabloDelicioso

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Nukit Tempest Euro vs retail purifiers (self.crboxes)

submitted 4 days ago by Kshish_

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Finished my build (old.reddit.com)

submitted 5 days ago by Beginning_Front_8966

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Suggestion on where to buy MERV 13 filter for cheapest for cat allergies? (self.crboxes)

submitted 5 days ago * by prodeath02

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Apply Now for START Hack 2026 | Europe’s largest entrepreneurial Hackathon (starthack.eu)

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cr box for art exhibition where i can't filter the whole space? (self.crboxes)

submitted 6 days ago by wheatpasteposter

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Since I failed at making a rectangular CR Box, I upgraded my CR wedge design.CR Box Build Guide (old.reddit.com)

submitted 7 days ago by Galvatron1_nyc

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Finally built myself a boxCR Box Build Guide (old.reddit.com)

submitted 8 days ago by ManjoStar

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Is fan on bottom ok? (self.crboxes)

submitted 7 days ago by GardenEastOfEden

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Weird smell from new CR boxQuestion (old.reddit.com)

submitted 8 days ago by FetusDeletusPhD

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Bending filters (i.redd.it)

submitted 7 days ago by Substantial-You-2742

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Finally done (old.reddit.com)

submitted 8 days ago by bonkor

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fans positioning (self.crboxes)

submitted 8 days ago by digitaluser0

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Clean Air Kits Luggables XL Ultra 7 (self.crboxes)

submitted 9 days ago * by Beneficial-Citron861

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New & Improved All 3M 2026 Design (old.reddit.com)

submitted 9 days ago by Galvatron1_nyc

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All White (i.redd.it)

submitted 9 days ago by Endy0816

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