Since 2010, all portable indoor air cleaning devices sold to people or businesses in California are required to be certified by CARB. As of October 2020, electronic in-duct air cleaning devices are also subject to the regulation. To be certified, all air cleaners must be tested for electrical safety. Electronic air cleaners must also be tested for ozone emissions and meet an ozone emission concentration limit of 0.050 parts per million (50 ppb).
File Type:
www
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Regulation/Standards
I scanned and uploaded this book to the Internet Archive 600dpi colour for anyone interested: https://archive.org/details/applications-of-germicidal-erythemal-and-infrared-energy-by-matthew-luckiesh