These units, said to be capable of producing 40-100 gallons of clean water per day, can be powered by solar or solar plus grid power. The device uses a combination of salts, fans, solar heat, and a condenser and the installation of the units is "about the same cost as installing a hot tub." Multiple units can be stacked for more water generation capacity for larger homes or businesses. Humid air is pulled into to the unit using energy efficient fans, which is circulated through patented desiccant technology. During the extraction phase, water is baked from the desiccant using warm air and condensed into pure, clean water. Minerals are added back into the water and can be piped directly into your home, garden, or external water tank. The quality of the water meets WHO’s standard for drinking water – even when created from polluted air, like Los Angeles smog. How? Because the salt only absorbs H20 from the air, not contaminants, so pure distilled water is baked out of the salt.