Archive · 8 Nov 2025
Delhi Man Builds DIY Air Purifier for Rs 2,000, Claims Significant AQI Improvement
When the air in Delhi gets really bad, a person shared how they made their own air cleaner for about $25.
They used a fan and a special filter, putting them together with some cardboard.
This homemade cleaner worked so fast that they say it made the air much cleaner in just 15 minutes, even better than a store-bought one they had.
Many people on the internet thought it was a great idea and are excited to try making one themselves.
It's a smart way to get cleaner air when pollution is high.
A Reddit user from Delhi built a functional air purifier for approximately Rs 2,000.
The DIY air purifier was constructed using an exhaust fan and a HEPA filter, along with other common materials.
The user claims the homemade device reduced indoor AQI from 400 to 50 within 15 minutes.
This cost-effective solution was created in response to Delhi's severe winter air pollution.
The Redditor stated their DIY purifier performs effectively, even outperforming a commercial Philips air purifier they own.
- Who
- A Reddit user from Delhi (username 'shukrant25')
- What
- Built a functional DIY air purifier and shared its construction and effectiveness online.
- When
- During a period of severe air pollution in Delhi, with AQI levels touching 347.
- Where
- Delhi
- Why
- To combat worsening air pollution and provide a cost-effective alternative to commercial air purifiers.
DIY Air Purifier
Commercial Air Purifiers
Cost
DIY Air Purifier
Built for approximately Rs 2,000, utilizing readily available components.
Commercial Air Purifiers
Commercial units typically cost significantly more than Rs 2,000.
Effectiveness Claim
DIY Air Purifier
Claimed to reduce indoor AQI from 400 to 50 within 15 minutes, even outperforming a Philips model.
Commercial Air Purifiers
While effective, the builder suggests this specific DIY model's performance is superior.
Assembly
DIY Air Purifier
Constructed using an exhaust fan, HEPA filter, switch, regulator, wires, cardboard, and glue gun.
Commercial Air Purifiers
Purchased as a complete manufactured unit, requiring no assembly by the user.
- Cost of DIY Purifier
- Rs 2,000
- Key Components
- Exhaust fan, HEPA filter, switch, regulator, wires, cardboard, glue gun
- Location
- Delhi
- Claimed AQI Reduction
- From 400 to 50 within 15 minutes
- Room Size Addressed
- 12x12 foot room
- Fan Speed Used
- Minimum setting
