There are commercially available systems that do that now, one that seems popular in my area is https://www.aquaria.world/ .

As to your question, would it be a problem if everyone did it -- it depends obviously on your definition of "problem", but consider that most people doing this have no way to dispose of the water they take from the air except by putting it back in the air. It might increase regional power consumption, and smooth out nightly shifts in atmospheric humidity, but unless there is a new river running to the sea, the average atmospheric humidity will remain the same.

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largbae an hour ago | parent [-]

This is fun, thank you! I wonder why home HVAC units couldn't just capture the drain water to accomplish something similar for "free".

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LarsAlereon an hour ago | parent [-]

The condensate water is laden with bacteria, mold spores, and pollution concentrated from the air. It can definitely be filtered and sterilized, but in water scarce environments you usually can't pull enough water from the air to be worth it.

	▲	devmor an hour ago \| parent [-]
		Side-tangent, but this reminded me of the health nightmare that the incredibly common “kinetic mist” style humidifiers/vaporizers are. I think there may be a general lack of understanding to how pollution and bacteria concentrate in our daily environments.