A reverse osmosis filter will provide plenty of water with nearly no minerals. They're available to install under the sink/counter for a few hundred bucks and provide clean drinking/cooking water and work fine with ultrasonic humidifiers without the issue of depositing minerals everywhere / clogging up the ultrasonic emitter. So its a lot cheaper than buying it plus you get great water.

▲

VorpalWay 2 hours ago | parent [-]

Those aren't exactly common here, since municipal water is high quality and everyone drinks it as is. It is not like some parts of the world where the tap water is full of chlorine and barely drinkable (I ran into that when I went to Athens).

And if you have your own well, you generally do a cheaper filter targeted at whatever impurity you have (such as an iron filter), rather than a reverse osmosis filter.

With reverse osmosis the water also gets too pure for drinking and you need to add back minerals to it for safety, it is not healthy to drink ultra pure water for any prolonged period of time.

	▲	ssl-3 an hour ago \| parent [-]
		Man. It seems like every avenue of humidification is paved with difficulty. Ultrasonic humidifiers (and others) that spritz water droplets out? They need fed expensive water, or they spread particulates everywhere. Health aspects aside, it's nice living in a house that isn't bathed in something that looks like chalk dust. Evaporative methods? They're similar in their lust for pure water, and the particles tend to concentrate at the humidifier instead of everywhere else. That accumulation needs to be cleaned up periodically (or parts replaced, depending on how rent-seeking the design is). Distilled water from the store? That's gloriously clean water, but it represents a money pit that can never be filled up. RO water? Sounds nice (is nice), but they're expensive and inefficient (producing 1 liter of RO water wastes in the realm of 3 or 4 liters down the drain). The systems need installed, and not everyone has the capacity to wrangle their own plumbing projects. And as an added bonus: Drinking RO water saps our precious bodily fluids of the minerals and electrolytes that people crave to stay alive, so we also seek to deliberately impurify it. I guess that means that an ideal path to RO-oriented humidification, we end up with 3 taps at the kitchen sink, then? One that provides demineralized for the humidifier, another that provides remineralized water for drinking, and one for everything else? --- It's all ugly in some way. Isn't there some kind of evaporative humidification method that is easy and inexpensive to clean? Something I can just feed cheap tap water into, and that I only have to deal with cleaning once a month or something? That sounds like the path of least pain for me in my neck of the woods.