Where should an air filter be placed relative to the fan for best efficiency?

यह पेज हिंदी में उपलब्ध नहीं है| अंग्रेजी में देखें| For the sake of viewer convenience, the content is shown below in the alternative language. You may click the link to switch the active language. If you’ve been wondering whether the filter should go on the front or back of the fan, then you’re in […]

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Protect yourself from air pollution in polluted cities: Beginner’s Fact Guide

यह पेज हिंदी में उपलब्ध नहीं है| अंग्रेजी में देखें| For the sake of viewer convenience, the content is shown below in the alternative language. You may click the link to switch the active language. So you’ve arrived to a polluted city, be it in Beijing or Bangalore, Delhi or Shanghai. Here’s how you can […]

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Do we need add-on air purifiers?

यह पेज हिंदी में उपलब्ध नहीं है| अंग्रेजी में देखें| For the sake of viewer convenience, the content is shown below in this site default language. You may click one of the links to switch the site language to another available language. Soon after I started making DIYs, people emailed me asking if we could make […]

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Can I Clean or Wash HEPA filters? – Supplemental Data

यह पेज हिंदी में उपलब्ध नहीं है| अंग्रेजी में देखें| For the sake of viewer convenience, the content is shown below in the alternative language. You may click the link to switch the active language. This post contains supplemental data for the post “Can I Clean or Wash HEPA filters?“. It includes detailed information about […]

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Can I Clean or Wash HEPA filters?

यह पेज हिंदी में उपलब्ध नहीं है| अंग्रेजी में देखें| For the sake of viewer convenience, the content is shown below in this site default language. You may click one of the links to switch the site language to another available language. HEPA filters are a nearly perfect solution for air pollution. They are backed […]

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Can Activated Carbon Remove Formaldehyde?

यह पेज हिंदी में उपलब्ध नहीं है| अंग्रेजी में देखें| For the sake of viewer convenience, the content is shown below in this site default language. You may click one of the links to switch the site language to another available language.   In a previous blog post, I wrote about how I tested activated […]

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Is a 30 RMB HEPA Reliable?

यह पेज हिंदी में उपलब्ध नहीं है| अंग्रेजी में देखें| For the sake of viewer convenience, the content is shown below in this site default language. You may click one of the links to switch the site language to another available language. After I published directions for how to make your own purifier, people asked me: […]

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Does adding a carbon layer reduce particulate effectiveness?

यह पेज हिंदी में उपलब्ध नहीं है| अंग्रेजी में देखें| For the sake of viewer convenience, the content is shown below in this site default language. You may click one of the links to switch the site language to another available language. I recently published tests showing that carbon actually removes VOCs. But adding that […]

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Does Carbon Really Work?

यह पेज हिंदी में उपलब्ध नहीं है| अंग्रेजी में देखें| For the sake of viewer convenience, the content is shown below in this site default language. You may click one of the links to switch the site language to another available language. I wrote early on that my number one concern in China is particulate pollution. […]

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HEPA Longevity Test: Day 200

यह पेज हिंदी में उपलब्ध नहीं है| अंग्रेजी में देखें| For the sake of viewer convenience, the content is shown below in this site default language. You may click one of the links to switch the site language to another available language.   One of the biggest questions when I started doing the DIY was […]

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