A Genius COVID-Era Hack Is Clearing Minnesotans Smoky Air

There are a lot of do-it-yourself hacks floating around the internet, some great, some not so much. But this quick, easy, and most importantly, affordable DIY hack might be a lifesaver this summer.

Canadian Wildfire Smoke Impacting Air Quality in Minnesota

Thanks to our friends in Canada, large areas of the United States, including Minnesota and Wisconsin, have been blanketed in thick smoke from more than 100 wildfires classified as “out of control” by the Canadian Interagency Forest Fire Centre.

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This smoke has been affecting people outdoors after just a short time. Trouble breathing, irritated eyes or throat, and other serious medical issues can arise due to prolonged exposure.

The smoke has been so intense that it’s even affecting indoor air quality. Many have turned to home air purifiers, but with steep prices, people are now looking for more budget-friendly solutions.

Enter the Corsi–Rosenthal Box

Originally developed during the COVID pandemic, the DIY air purifier known as the Corsi–Rosenthal Box is an affordable option made with materials from stores like Target or Walmart, typically costing between $50 and $150.

Here’s how it works: Four or five air filters are sealed together with duct tape to form a cube. A box fan is placed on top, blowing air down through the filters to clean it.

It Actually Works—And It’s Safe

In studies of home-built air purifiers, the Corsi–Rosenthal Box proved to be quite effective at reducing wildfire smoke particles. Data showed particulate matter was reduced by up to 75%.

It’s also safe to use. According to Underwriters Laboratories, attaching filters to box fans does not create an increased fire hazard.

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