Water Filtration: Safe Drinking Water from Thin Air?

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Dewpointe Hot/Cold ModelSafe drinking water from thin air? That’s the claim of San Luis Obispo, California, based Atmospheric Water Systems (AWS), which offers a product line of air-filtering water systems under the brand Dewpointe. Founded more than a year and a half ago by Co-owner Stephen Krauss, Dewpointe systems takes a different approach to creating safe drinking water. Rather than filtering the water that comes through a pipe, Dewpointe filters the moisture out of the air to create drinking water. There are no water pipes attached to the machine. The rectangular device simply plugs into a wall.

I caught up with Mr. Krauss on the second day of this year’s West Coast Green event held at Fort Mason in San Francisco, California, and found out more about the Dewpointe system.

How does it work? Magic?

No, similar to a dehumidifier, Dewpointe pulls moisture out of the air; but unlike a dehumidifier, the goal of this device is to make that moisture drinkable. A series of filters take out 99.99% of the impurities and create clean drinking water. Impressive as this may sound, it also means that there must be moisture in the air for Dewpointe to operate effectively. Hence, all tropical or even moderate humidity environments in the United States such as coastal states, the south and mid-west work well. In desert environments or low moisture areas such as the south-western US, the Dewpointe will struggle.

How much water does it create and what does it cost?

Depending on the relative humidity, a residential unit will create 3-8 gallons of drinking water per day. There is a hot/cold water model (DH9) and a cold only model (DH9x). Both models retail for $1,599. Commercial units are also available but were not at the show and therefore are not described in this article.

Is there maintenance?

Yes, similar to all other water filtration systems, the water filters need to be changed. Estimated annual filter changes is approximately $100. The filters are made of plastic and can be recycled in the same way you would recycle any other plastic. Units come with a 90-day labor, one-year parts and three-year compressor guarantee from the manufacturer.

How does it taste?

Anyone who has ever tasted “plasticy” bottled water or chlorinated tap water will know that taste is the real test of any filtration system. Dewpointe claims that its water is more pure than anything you’ll get out of your tap and will be much better than what you are accustomed to tasting from bottled water. Mr Krauss states that this is because the EPA allows 20 parts per million (PPM) of total dissolved solids in tap water whereas bottled water can have anywhere from 400-800 PPM. Dewpointe has 3 PPM. My completely unscientific and statistically meaningless test of drinking a cup of Dewpointe water confirms that it does taste clean, clear and overall excellent.

Graphic Display

How much energy does it use?

This is the downside of using an electric device to create clean drinking water. The hot and cold model uses around 10 kilowatt (kW) hours of power to create 3-8 gallons per day at a cost between $0.40 – $3.00/day. This is because the cost of electricity varies across the US with some areas paying only $0.04 per kW hour and other areas paying as high as $0.30 per kW hour. The higher your humidity, the more you will produce and the lower your per gallon cost. Worst case scenario is that the cost of a gallon of purified water is the minimum amount of water produced (3 gallons) and the highest cost of electricity ($0.30 * 10 kW hours = $3.00) meaning that a gallon costs $3.00/3 gallons = $1.00 per gallon. This is comparable to what you would pay at the store but means you do not have to waste a plastic bottle or make a trip Filtered air at the touch of a buttonto the store. The best case scenario for a Dewpointe system is that you produce 8 gallons of water at a cost of $0.40 or $.05 per gallon. As you can see, where you fall on the humidity/electric rate spectrum makes a big difference but even the worst case scenario is comparable to the price for a gallon in the store. Mr. Krauss states that the average cost one should expect to pay is somewhere between the extremes or around $0.50-$0.60 per gallon. Note that both models shut off when the water storage tank is full.

Off grid considerations

Since the Dewpointe system runs on electricity, anyone who wants drinking water off the grid could simply couple this unit with solar panels to create drinking water in remote locations. This is ideal for emergency relief areas, military applications, park ranger stations and a plethora of other situations.

Manufacturing source:

The compressors are built in the United States, the filters come from Japan and the body of the units is made in China. Mr. Krauss stated that he spent a long time determining the best place to manufacture the units and through his research realized that an entirely US built system would need to retail for closer to $4,000.

Cool to the last drop

Depending on where you live, the quality of your water and the price you pay for electricity, Dewpointe may offer a clean, cost effective, great tasting, and more sustainable way for you to enjoy drinking water. Magic? No. Innovative thinking? Yes.

To see the device in action and find out more about why it was developed, watch the video below:

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6 Comments

  1. Drinking water filter systems are not created equal by any means. There are standard cartridge filters systems, reverse osmosis systems and specialty cartridge systems like Aquasana. So which one should you look at? A standard cartridge system typically uses a sediment and carbon and/or specialty filter. For most homes using city water, this is actually a great system for such an economical price. Specialty cartridge systems like Aquasana are exactly the same thing except you are forced to use their filter. http://www.isopurewater.com

  2. “Nothing but pure water?” actually just a bunch of nothing… not wait loud noise and high electrical bills.

    I wish that there were reviews for me to read before i made this purchase. hopefully this will stop someone from making the mistake I did.

    The biggest waste of money I have ever spent!

    The first unit I received would power on then immediately shut off and flash the water leak indicator light. It hadn’t even generated any water to leak! Turned the unit on and off several times over the next few days then one day it decided to stay on. It took a long time to generate enough water to dispense, (a day and a half) You have to dump the first tank. I will say that the water did taste great when it was working, but that did not last long. All sorts of other errors happened. Then, one day it did start to leak water everywhere without even powering off and shutting down. The the cold water tank would stay empty while the hot would fill up. AWS customer service finally got in touch with me a month after i reported the leaking. I told them at this point I just wanted to return the unit and get my money back. They insisted that this was just a bad unit which it was and they sent me a new unit. They were supposed to take back the old unit and hopefully recycle it? I still have it and the Second Unit which is not working for me. I could go on and on… awful mold started growing in the fist unit…

    The second unit hasn’t generated a drop of water. I have boiled water and ran humidifiers raising the humidity just to try to get it to produce water. the unit is loud and uses excessive amount of energy. I have tried calling AWS and have yet to receive call backs even though I was promised to receive a call the next day. It has been 4 months since my initial purchase and weeks since i was promised a phone call and a refund. I have two useless machines

    I will update this review IF and when the company makes good on their word to refund me my money. The customer service representatives are really friendly and polite when and if you actually get to talk to one

  3. Wow! That’s the first time I have heard that the units don’t work at all. I was told that they have a really hard time in low humidity areas as the water in the air is what they use to create drinking water so if you’re in a desert or some other low humidity place, that could be the problem. The units I saw at West Coast Green seemed to be working but admittedly, I did not watch them all day long. Please update this post with the outcome of your situation. If the product is not working, people should beware. Thanks,

    -Jared

  4. Plantas Purificadoras on

    These new technologies will help many countries in development. And surely in the future we will have new technologies.

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