When I looked into conventional dehumidifiers and air conditioners, what stopped me from systemically re-using air conditioner condensate even as gray water was finding out that it can contain trace amounts of heavy metals and industrial oils from the condensate going through less-than-ideal materials used for the coils and evaporator parts. Also, if you live in an area with air pollution, the condensate contains concentrates of the pollution, as well as allergens and biological contaminants. I'm hoping someone reading this might have looked into it more than I have, and can point me to some reading material that can help me either further work through or dismiss those concerns.<p>When I read through the article, I didn't see any links to potability test results. So there might be a purification step after this gasifier powered water generator to turn the output of this into truly potable water, so the cost won't really be below two cents per liter in the field. Purification itself is an energy-intensive endeavor, whether to create purification materials or straight use of energy in more active systems, and is why potable water is a rough order-of-magnitude proxy for energy.