What was the problem?
Delhi is one of the world’s most polluted cities. The city’s air quality regularly exceeds safe limits, cutting life expectancy by nearly 12 years and threatening public health, food security and sustainability.
Team Synergy saw this as a challenge they could no longer ignore. They wanted to do more than raise awareness, they wanted to build a real solution for cleaner, healthier air in public spaces.
What did they do?
They designed the Eco Air Defender, a solar and wind-powered mobile air purifier built to clean outdoor urban air. With real-time air monitoring, a two-stage filtration system, and full portability, their invention offers a clean-tech solution that’s both sustainable and accessible to public areas such as schools, parks and streets.
The device is scalable, energy-efficient, and designed to put the power of pollution control directly into communities’ hands.
RETHINK Traditional Methods
The team challenged the norms, moving beyond restrictive policies and stationary indoor devices to ask: what if clean air could move with the people who need it?
REDESIGN Clean Air Technology
They combined HEPA (High Efficiency Particulate Air) and activated carbon filters with a DC blower, powered entirely by solar and wind energy. The unit is mounted on wheels with a handle for mobility.
RESEARCH the Impact
Field testing in high-pollution zones like Karol Bagh and Shadipur showed significant AQI reductions after use, from 100 to 50 in one case. A built-in monitor displays live air quality data, creating instant awareness and engagement.
REPOWER with Renewable Energy
The team powered the entire unit with off-grid solar and wind sources. This not only avoids using fossil-fuel energy but also ensures the purifier is sustainable and accessible to communities with less resources.
What was the solution?
Eco Air Defender is a renewable-powered, mobile air purifier for outdoor use. It filters out harmful PM2.5, PM10 and gases, reduces pollution levels quickly and engages citizens through live data.
The result: a scalable, zero-emission solution that turns clean air from a luxury into a right.
What was the result?
Eco Air Defender was successfully tested in multiple outdoor zones with heavy air pollution, reducing AQI by up to 70%. Its portable design and renewable power system make it especially well-suited for deployment in urban areas that are typically hard to reach. The team now plans to scale production and partner with municipal authorities to expand its use across Delhi. You can follow their journey here.This project contributes to the following UN Sustainable Development Goals:
3. Good Health and Wellbeing
Eliminates toxic chemicals from food packaging, promoting safer consumption.
7. Affordable and Clean Energy
The solution is powered by renewable, available sources, reducing dependence on fossil fuels.
11. Sustainable Cities and Communities
Makes urban spaces safer and healthier through accessible air purification.
13. Climate Action
Tackles pollution and raises awareness through clean technology and real-time data.
Breathing clean air shouldn’t be a privilege – it should be a right. Living in Delhi, we felt the urgency every day. NXplorers empowered us to stop waiting for change and start creating it. With the tools and mindset, we gained through the programme, we turned our concern into action. That’s how the Eco Air Defender was born – a solution that could help entire communities breathe easier.
