I installed this one a few years ago, works great:
http://www.canadiantire.ca/en/pdp/d...furnace-humidifier-0643101p.html#.UpgBcXiVvYU
Because there's no cloth or anything, it is less prone to mold and other issues, and it's easy to clean. I ran a drain line with a valve, once in a while I'll turn the valve to drain it to get rid of any sediment. You can buy an automatic valve as well that does it like daily.
I have to watch how high I set it though, it will actually fog up all the windows.
This is a whole house unit, so it hooks up to the furnace. My furnace (and I imagine most others) have a "hum" terminal. It basically provides 24vac when the furnace is on. You can feed the humidifier off that so it only turns when the furnace is on, and when the humidistat is calling for it. I just put the humidistat on the return vent but you could technically put it somewhere else in the house, I'd imagine.