Home / Air purification / eTree Ambient Air Purifier
02 • Air purification • Ambient air
Cleaner air where people breathe
eTree is a patented outdoor air purifier shaped like a tree. It draws in polluted street-level air, removes dust and fine particulates, and reports air quality live. One eTree does the air-cleaning work of about 20 trees.
The challenge
Millions breathe unsafe air on their way to work and school
Our answer: eTree purifies air at street level and reports PM2.5, PM10, O₂ and CO₂ live from every unit.
Why choose it
Key benefits
Purifies air at street level
Cleans the air at the height where pedestrians, commuters and children breathe.
Data you can report
Sensors track PM2.5, PM10, O₂ and CO₂ so cities and companies can show measured results.
Very low running cost
About 0.3–0.5 units of electricity a day, with no filters to replace in the primary stages.
Designed for public spaces
A tree-like form that blends into roads, parks and campuses, on a 2.5 ft square footprint.
How it works
Three-stage purification
Air rises from the base to the top of the unit and is cleaned in three stages.
Ideal for
Where it is used
View full technical specifications
| Technology | Patented air pollution filtration system (Indian Patent No. 422515, valid to 2042) |
| Purification stages | Cyclone, coaxial corona discharge and activated carbon |
| Air flow | 300 CFM per unit |
| Monitoring | PM2.5, PM10, O₂ and CO₂, online |
| Trunk size | 3 ft × 3 ft × 9.5 ft, with 8 ft diameter branches |
| Weight | About 150 kg |
| Power | 230 V, 5 A; about 0.3–0.5 units per day |
| Site needs | AC supply, a 2.5 ft × 2.5 ft flat concrete base and an internet connection |
| By-product | Collected dust and carbon, weighed and reported |
VJTI Mumbai is carrying out an independent performance evaluation of eTree.
See it in action
Photos and video
Impact parameters
Impact we measure and report
Every installation is tracked against clear, verifiable parameters so you can report outcomes to regulators, boards and CSR committees.
20
Trees’ worth of purification per unit
300 CFM of continuous street-level purification.
4
Parameters monitored live
PM2.5, PM10, O₂ and CO₂ on a dashboard.
Dust and carbon collected
Kilograms captured in the tray, weighed and reported.
Local air quality
Before and after readings around the site.
Policy & SDG alignment
Aligned with national priorities and global goals
UN Sustainable Development Goals
Central government policy
National Clean Air Programme (NCAP)
Supports cities working to reduce PM10 and PM2.5 levels.
Finance Commission air-quality grants
Million-plus cities can deploy measurable air-quality interventions.
Green Highways Policy, 2015
Complements roadside plantation at non-plantable points such as toll plazas.
Prime Minister’s vision
Mission LiFE
Healthier, more liveable cities.
Swachh Bharat
Clean air as part of clean cities.
Make in India
Patented Indian clean-air technology.
CSR alignment
Schedule VII (iv)
Environmental sustainability and ecological balance.
Schedule VII (i)
Preventive health care through cleaner air.
Testimonials
What our clients say
“We installed eTree at our central student quadrangle where foot traffic is highest. Beyond being a striking green installation, it creates a clean-air zone. Students sit and study under it, and the real-time display shows visible drops in PM2.5 and PM10 levels during peak hours.”
Dean of Infrastructure & Student Affairs, Educational Campus
“Reducing traffic emissions at congested road junctions is a key NCAP priority for our municipal corporation. The eTree units are an ideal decentralised intervention. Their filtration captures vehicle soot and particulate smog continuously without taking up large sidewalk space or needing heavy civil work.”
Executive Engineer, Smart City Development Corporation
Frequently asked questions
Questions about eTree Ambient Air Purifier
How does eTree purify air?
Air enters at the base and passes through a cyclone that removes coarse dust, a corona-discharge stage that captures fine particulates and carbon, and an activated-carbon stage that neutralises ozone. Clean air leaves at the top.
What does eTree monitor?
Each eTree tracks PM2.5, PM10, O₂ and CO₂ online, so you can see and report air quality around the unit.
How much power does eTree use?
About 0.3–0.5 units of electricity a day on a 230 V, 5 A supply.
Where can eTree be installed?
At traffic junctions, toll plazas, bus and railway stations, campuses, hospitals, parks and industrial estates. It needs a 2.5 ft square concrete base, power and internet.
Can eTree be funded through NCAP or CSR?
Yes. Cities can use NCAP and Finance Commission air-quality funds, and companies can fund eTree under CSR Schedule VII for environmental sustainability.
Get a proposal
Get an eTree proposal for your city or campus
Tell us your location and how many sites you want to cover. We will recommend the number of units and send a proposal with monitoring and maintenance.
- ✓ Site and air-quality assessment
- ✓ Number of units and placement
- ✓ Live monitoring dashboard
- ✓ NCAP, CSR and green fund guidance