The A2WH system produces pure potable water from air using only solar
energy. It operates with a much lower operating cost than other
AWG systems because it does not require large amounts of electricity.
The A2WH system absorbs moisture at night when humidity is relatively
high and converts what it absorbed the prior night into liquid water
the following day using solar thermal heat. Well over 90% of the energy
used in the system is solar heat.
In this system all condensing occurs at near ambient and it does not
require any refrigeration. High quality filters are used to filter the
air before the absorption at night which keeps the interior of the
system very clean.
A small amount of energy is delivered by Photo Voltaic panels which
operate a microcomputer control system, sensors, blowers, pumps, etc.
New A2WH Version:
Our new A2WH version is less expensive and can be more easily produced
at a large scale.
- Install as little as one square meter system to produce 32 ounces gallon per day
- Very few moving parts and very low maintenance
- Each 1.2 square meter unit will produce approximately 0.8 gallon per day during the summer
- Thousands of Units can be combined to produce large volumes of water
- The initial order for every country must be large enough to pay for patent filing in that country
- We will license this unit for regional manufacturing
Producing water where it
Imagine the ability to deliver safe drinking water in places where
there is no power, no safe ground water, no available surface water and
no viable rain capture. Imagine doing this where there isn't
any salt water or where the salt water is too contaminated to allow
Every day solar heat cycles 1,356 cubic kilometers (358 trillion
gallons) of water through the atmosphere. A portion of this
over land where our AWG units can capture it and turn it back
into fresh, pure liquid water usable for drinking, cooking
crops. Our A2WH units can do this in the
deserts and in fact run best in hot sunny locations where water is
needed the worst. We do not need rain,
fog or any
other form of precipitation.
Our A2WH design has few moving parts which are easily serviced and can
use low grade heat from simple solar collectors. This systems
unique design makes it environmentally friendly and suitable
cost effective scaling from small household models through
industrial and institutional systems producing many million gallons per
Water is essential for human life. We drink it and use it for
crops. Water is already scarce and becoming ever
valuable. In fact the UN has predicted wars over access to
water. Shortages of water in California have already caused
than 100,000 acres of farmland to lie fallow as a result of the 2008
Over 70% of earths surface is covered with water but very little of
this water is useful for humans to drink or grow
crops. 97% of all water is saline
contained in the
oceans which leaves only 3% as freshwater. 70% of
freshwater is locked up in ice leaving 22% as ground water and surface
water. Ultimately less than 1% .of the world total is
in lakes, rivers and wetlands.
Adequate water is essential for economic and political growth
stability. Our technology is specifically designed to deliver
water in locations where unsafe or insufficient water is
available. It was invented to allow continued
in areas where all other water sources have been exhausted or are fully
Ultimately we hope to see our water from air technology used to reverse
desertification by providing sufficient water to establish green zones
in the deserts. This will ultimately reduce food insecurity, reduce the
risk of drought induced famine and reduce the poverty
induced when people are forced to scavenge on a day to day basis just
to obtain enough water to meet their basic needs.
How does A2WH work?
The A2WH system uses a desiccant
to absorb moisture from the
air. The higher the humidity the more water our
can absorb per pass which increases production.
We use solar heat to drive both the
airflow for the absorption process
and to provide heat during the regeneration process which extracts the
moisture from the desiccant and allows us to capture the water in
A sophisticated micro controller
based sensor system determines when to
switch between absorption and regeneration modes. We use
different types and amounts of desiccants depending on the local
conditions to optimize the performance of the
system. A small Photo
Voltaic solar panel
provides power for the micro controller, sensors, various valves,
We have an optional enhancement that
uses wind energy (wind over 4.5
MPH) to drive circulation at night when the relative humidity is
higher. To make this work best we increase the
the desiccant used in the system. In some areas
nightly wind this allows the unit to work in areas with daytime
humidity as low as 10% We have optional enhancements which
electric fans and heaters to augment or replace the solar heat.
The input air is filtered before it
enters the absorption chamber where
the desiccant absorbs water out of it. The air is re-filtered
when heated for regeneration. A final stage of filtering is
as the air enters the condensation phase where the H2O is turned into
liquid water. As a result the output water is very
pure. We still recommend treatment using
a NSF 54
grade filter prior to consumption because we do not have any control
over the cleanliness of the storage tank.
Our difference from common
Most Air to water systems use refrigeration to chill air to the
point that means that as the dew point drops the more the unit must do
more work to sufficiently chill the
air. This causes them to use large amounts of
electricity. It is fairly common for electric units to consume of
2.2Kwh per gallon produced which gives them a high variable operating
costs which can exceed 40 cents per gallon.
We designed A2WH units to operate entirely from solar energy. This
is mostly solar heat with a small amount of solar electricity used to
operate valves, sensors and the electronic control
system. This allows our system to operate much more efficiently which
especially important in areas where electricity is expensive such as
islands where electricity is generated using imported
Most AWG systems are built around a refrigeration system which is very
similar to that used in small electric air conditioners. The
units consume 600 to over 3,000 watt hours per gallon of water they
produce. The industry average trends show consumption over 2,2000 watt
hours per gallon which rise rapidly as
A2WH functions with no external electricity. This saves 3,000
watts per gallon. Our novel design and control system allows it
to efficiently extract
water in a wide range of conditions including conditions where electric
AWG units become inefficient or do not work at all.
We recently received a
letter from a man who has a 40 acre ranch in a remote part of
Arizona. He purchased an electric refrigeration
unit. After investing $29,000 in solar
batteries his unit still doesn't work when the humidity drops
below 48% RH and still does not deliver the rated production.
Our units can reduce carbon emissions by over 5 pounds of carbon per
gallon produced as compared to grid powered electric systems. (2.2
pounds carbon per KWh saved * 3000 watts per gallon =
pounds of carbon per gallon of water). Even a small 6
gallon per day system this adds up to nearly 11,000 pounds reduced
carbon emissions per year.
Our system uses solar thermal heat to harvest water from air even when
the air has low humidity. Unlike radiant
systems this system actually produces during the dry months even when
there is no dew and it's production can go up in windy locations which
can prevent radiant chilling systems from working at
all. Our technology can work in conditions where the dew point is far
the chilling level delivered by radiant chilling panels.
Our most important difference is the compatibility of the core design
for scaling efficiently into millions of gallons per day at a
reasonable cost. It's other major benefit is compatibility
remote areas where grid power is either unavailable or
expensive. In some areas our units can be installed
mountains outside of towns and provide both water pressure and
electricity for the town. Rather than exaggerate summer power
shortages our system can actually help reduce these shortages.
The Rosenthall Group, Asia, Inc. Korea
July 2012 - The Rosenthall Group, Asia, Inc. Korea has been granted an Exclusive Patent License from A2WH USA to build, market and distribute the Water Harvesting Product based on the technology of A2WH, to the Korean market. They have also been granted have a non-exclusive write to market the A2WH technology worldwide provided A2WH has not granted a exclusive right in a given country. The Company has agreement to have a partnership with Jintec Co. Ltd., Korea, an Industry Leader in Water Dispenser and Others to establish SPC called “Aqua Global Corporation” in Korea.
Typical Cost of water
A2WH system :
per liter per day
to 50 gallons per day
- $0.15 per gallon
to 500 gallons per day
- $0.10 per gallon
to 5,000 gallons per
- $0.08 per gallon
to 50,000 gallons
- $0.05 per gallon
to 500,000 gallons
- $0.035 per gallon
gallons per day
- $0.015 per gallon
gallons per day
- $0.006 per gallon
a cost per gallon range is supplied the high end is qty 1 while the
low end is qty 5,000. All costs are basic
estimates and are
influenced by region and fluctuating materials costs. All
be pre-paid and we lock prices in when the payment is
pre-purchasing the supplies at that time.
use this to calculate capital investment. Choose a system size such
as 5,000 gallon per day system at $0.09 per gallon. Multiply
daily production by 365 days per year to find the system will
produce approximately of 1,825,000 gallons per year and 36,500,000
gallons during it's useful life. To obtain the capital cost you then
multiply 36,500,000 * $0.09 per gallon = $3,285,000 purchase price. You
should add local installation costs of about 20% and 7% annual
Want to Help?
We can use a wide variety of
us and let us know how
you wound like to be involved 206-601-2985 USA
- Qualified investors who want
to help bring a truly world changing
technology to market.
- Co-inventors willing to work
for stock and or help defer
development and testing costs are always appreciated..
- Industry leaders who need
water to locate factories in water
- Plastic Fab,
Welders, Machinist, Electronics
designers and many others.
- Land developers who have
land in mind which can not be developed
due to lack of water. Work with us to prove our system as a
source. Most effective where additional of reliable water
can increase the parcel value by more than $100K if only
water was available.
- Partner with those looking
to develop fallow land for high value
water wise agriculture where no water is available or where the water
has minerals such as Boron which are unhealthy for the plants.
This file last modified