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RE: Empty promises: Air pollution in Chiang Mai just as bad as ever
Air pollution is terrible. We breathe polluted air even at home. But luckily I found this site https://freshairdevices.com/germguardian-ac4825-vs-ac4300/ where I read the comparison of the GermGuardian Ac4825 air purifier with the Ac4300. This article helped me make my choice. Before that, I thought for a long time and chose between these two models of air purifiers.