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Amazon.com: Nu-Calgon 4900-20 - iWave-R Self-Cleaning Bi-Polar Ionization ION Generator for 6 Tons, 2400 CFM, 24-260 VAC (1) : Tools & Home Improvement
Eric Feigl-Ding on Twitter: "4) Global Plasma Solutions (GPS) is one of the country's top manufacturers of purifiers that use a technology called bipolar ionization: small machines, usually installed in air ducts,
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