Barley guy has the best water out of the air idea that I have read so far. Hot air can hold more water than cold air. So if air is cooled water can be extracted. Have you ever seen water dripping on the ground under a car idling at a stop light on a hot day. That is condensation coming off the air conditioner's condenser. To run such a system just to get water is inefficient. If you are going to have air conditioning you might as well gather water is the proper approach. There is another source for water using the same method, refrigerators cool air too. I rather doubt that using this system of extraction would provide enough water to survive on, but it would reduce the amount of outside water needed.
Any water gathered using these techniques would not be considered clean, dust, mold and mildew would be the most likely problems. I have been skimming, it's obvious that water filtration has been already discussed.
There is one thing that bears consideration. As this thread falls under the Going Green catagory I feel obligated to say that any of this technology will involve the creation of heat. Global warming is a bad thing yes? Internal combustion engines create heat too and with some electric vehicle owners aside we are guilty of burning fuel. I'm just sharing the knowledge, not passing judgement. Choices should be made based on as much information possible.
