I'm in New England, & have forced-hot-air furnace. I have a drum humidifier and hard water. So I have to use tablets every month and replace the pad twice a season. A pain. Not interested in a water softener (it would substitute, rather than eliminate the minerals).
Today I discovered a "drain timer". That would drain the humidifier twice a day.
It's from skuttle (same manufacturer as humidifier). I'm guesstimating that the pan holds a quart of water. (probably less). So that means it would cost me an additional 15 gal/month, which is trivial.
One concern - it would have to drain into my furnace H20 pump, not sure it would over tax the pump (i.e., too much water pouring into it at once).
Otherwise - Why isn't this an excellent idea?