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Lazarus Long on Twitter: "A mega thread on the ultimate DIY air filter known as the Corsi/Rosenthal Box (@CorsIAQ/ @JimRosenthal4). Take it into work. Donate a couple to your school classroom if
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Hurricane Classic 20 in. White Polymer Blade Portable Box Floor Fan with 3 Speed Settings HGC736501 - The Home Depot
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