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Key FactsHomemade Air Purifier Cuts Delhi's AQI Sharply
Nov 7, 2025 · Reading time: ~30 sec.
Summary created with AI assistance · Source: indianexpress.com
  • A Reddit user created an affordable air purifier for less than Rs 2,000 using a 150mm exhaust fan and a HEPA filter.

  • The device reduced the air quality index in a 12x12 foot room from 400 to 50 within 15 minutes at its lowest speed.

  • Basic materials such as a switch, wire, cardboard, and glue completed the simple yet effective setup.

  • The post went viral on Reddit, sparking calls for tutorial videos and workshops to help others replicate the design.
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