Updated on September 25, 2023


Created on October 5, 2020

Vayujal (VJ-400 Lpd Unit)

Upcoming Update

Vayujal is a water harvesting technology that converts atmospheric humidity into drinking water.

Developed By VayuJal
Tested By Eco Services India Pvt Ltd

Product Description

Vayujal (VJ-400 Lpd Unit) is a 400-liter water harvesting and purifying device that extracts water from atmospheric humidity. It aims to solve the global water shortage problem by utilizing abundant water molecules in the air. The device is also known for atmospheric water generators (AWGs) and is commercially available. It was designed by Ramesh Kumar, Ankit Nagar, and Prof T Pradeep as a startup in IIT Madras, India. It uses an 8 stage water purification system before it reaches the consumer and meet the WHO drinking water standards.

Target Countries


Target SDGs

SDG 6: Clean Water and Sanitation

Market Suggested Retail Price


Distributors / Implementing Organizations

This product is distributed by the manufacturer itself.

Manufacturing/Building Method

This product is manufactured and assembled in India.

Intellectural Property Type

Patent Protected

User Provision Model

Users can obtain the product/service by directly contacting the manufacturer.

Distributions to Date Status

The product has served more than 6,500 people with 12 projects as of 2020. Interview with Manufacturer 

Water source

Atmospheric humidity

Water produced (L/hr)

400 Lpd (16.67 L/hr)

Catchment size (cubic meters)


Energy requirement (kWh)

5 kW (at 70 %RH and 30 0Celcius)

Description of integrated water treatment


Built-in storage capacity (L)

100 – 300, as required.

Required environmental conditions

Relative humidity range: 35 – 99 %RH, and temperature range: 20 – 40 0C

Design Specifications

Vayujal (VJ-400 Lpd Unit) is an air-water generator that produces 400 Liter of water a day by extracting water from atmospheric humidity. The patented technology utilizes nanotechnology like bio-mimetic to make evaporators and condensers. The working mechanism of the technology follow five simple steps; The air is filtered after fresh humid air is sucked in through a vent. Then water is collected in the stainless steel water tank after it is condensed on a bio-mimicked surface. Hot air is released back into the atmosphere after the water molecules are extracted. The collected water then goes through an eight-stage filtration process to meet the drinking water standards of the World Health Organization (WHO) & Bureau of Indian Standards (BIS). Lastly, in order to ensure the purity and pH levels stability, essential minerals are added which are then ideal for human consumption. Some of the design specification for the device is as follow: Dimensions: (90 x 100 x 160)cm Net weight: 360 kg Power rating : 5 kW at 70 %RH and 30 0Celcius Refrigerant: R410A Power supply: 380 Vac, 3 Phase, 50 Hz Noise level (dB)< 65 Air Purification: Al mesh supported HDPE fabric

Product Schematics

Technical Support

Provided by the manufacturer.

Replacement Components

Filter media


10-15 years

Manufacturer Specified Performance Parameters

The device was designed to provide pure drinking water by tapping abundantly available water molecules in the air.

Vetted Performance Status

Testing performed on this product by Eco Service Pvt. Ltd. and CVR Labs Pvt. Ltd., India determined the potability of drinking water. All the bacterial, chemical and physical parameters were in terms of the drinking water standard provided by IS:10500-2012 (reaff:2014).


No known safety hazards are related to this product.

Complementary Technical Systems

A reliable power supply with 380 Vac, 3 Phase, 50 Hz is required to operate this product.

Academic Research and References

Nagar, A. and Pradeep, T., 2020, Clean Water through Nanotechnology: Needs, Gaps, and Fulfillment, ACS Nano.

Sarkar, D. et al., 2018, Patterned Nanobrush Nature Mimics with Unprecedented Water?Harvesting Efficiency, Advanced Materials Interfaces, 5(19), p.1800667.

Faqih, A.R.A.K.M., Fakieh Res and Dev, 2003, Production of potable water and freshwater needs for human, animal and plants from hot and humid air, U.S. Patent 6,574,979.

Spletzer, B.L., 2001, Method and apparatus for extracting water from air, U.S. Patent 6,230,503.

Compliance with regulations

The product complies with the Bureau of Indian Standards(BIS) – ISO 2012 and WHO drinking water guideline standards.

Evaluation methods

The product is evaluated for a number of water quality parameters in certified third-party laboratories.

Other Information

Media coverage of Vayujal Video on introduction to Vayujal

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