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In dry California, some buy units that make water from air

 

By Haven Daley

The Associated Press

BENICIA, CALIF. » , and in parched California, some homeowners are buying the pricey devices.

The air-to-water systems work like air conditioners by using coils to chill air, then collect water drops in a basin.

“Our motto is, water from air isn’t magic; it’s science, and that’s really what we’re doing with these machines,” said Ted Bowman, design engineer at Washington state-based Tsunami Products.

The system is one of several developed in recent years to extract water from humidity. Other inventions include mesh nets, solar panels and shipping containers that harvest the moisture from the air.

Bowman said his company’s machines — made for use at homes, offices, ranches and elsewhere — dehumidify the air and in doing so create water that’s filtered to make it drinkable.

The technology works especially well in foggy areas and depending on the size can produce 200 to 1,900 gallons of water a day. The machines also operate efficiently in any area with high humidity, including California’s coastline, he said.

But they’re not cheap, with prices ranging from $30,000 to $200,000. Still, in California, where residents have been asked to conserve water because one of the worst droughts in recent history has depleted reservoirs, some homeowners are buying them to meet their water needs.

Don Johnson of the Bay Area city of Benicia, said he bought the smallest machine, which looks like a towering AC unit, hoping it would generate sufficient water to sustain his garden. But he found it puts out more than enough for his garden and his household.

“This machine will produce water for a lot less than you can buy bottled water at Costco for, and I believe, as time goes on and the price of freshwater through our utilities goes up, I think it’s going to more than pay for itself,” he said.

Besides the high price, the unit also requires a significant amount of energy to run. But Johnson said the solar panels on his roof produce enough power to operate the machine without additional energy costs.

Experts such as University of California-Davis hydrology researcher Helen Dahlke said the technology makes sense for individual homeowners, especially in rural areas. But she said it is not a practical solution for California’s broader water woes.

Dahlke said the focus should be on fighting global warming to prevent future droughts.

“We really actually need to curb climate warming to really make a difference again,” she said.

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