![Richard Barrow on X: "After my tweet about my DIY air purifier, someone suggested I should check out one by AirDeveloppa, a Chiang Mai company. It's listed on Lazada for ฿1,495 Baht. Richard Barrow on X: "After my tweet about my DIY air purifier, someone suggested I should check out one by AirDeveloppa, a Chiang Mai company. It's listed on Lazada for ฿1,495 Baht.](https://pbs.twimg.com/media/EtZGoYXVIAMNvJj.jpg:large)
Richard Barrow on X: "After my tweet about my DIY air purifier, someone suggested I should check out one by AirDeveloppa, a Chiang Mai company. It's listed on Lazada for ฿1,495 Baht.
![Chiang Mai begins to operate an air purifier to filter micro PM 2.5 air pollution (prototype) [Chiang Mai News] | PTT Global Chemical Chiang Mai begins to operate an air purifier to filter micro PM 2.5 air pollution (prototype) [Chiang Mai News] | PTT Global Chemical](https://sustainability.pttgcgroup.com/storage/newsroom/videos/2021/10/20211020-213600-1.jpg)
Chiang Mai begins to operate an air purifier to filter micro PM 2.5 air pollution (prototype) [Chiang Mai News] | PTT Global Chemical
![Chiang Rai running out of air purifiers as pollution increases | Thai PBS World : The latest Thai news in English, News Headlines, World News and News Broadcasts in both Thai and Chiang Rai running out of air purifiers as pollution increases | Thai PBS World : The latest Thai news in English, News Headlines, World News and News Broadcasts in both Thai and](https://www.thaipbsworld.com/wp-content/uploads/2023/03/Thai-PBS-World-logo-3-5.png)