Perhaps evaporative will work better where you are since your heat needs to run more than ours does. Here it's dry, but not all that cold, so we didn't get much benefit from the evaporative unit. (and IIRC, it was much smaller than 14x14).
Way back, when we used the console humidifier, it could put about 5 gallons a day into the house, and then the cool damp air would cascade down from the upstairs hall to where I was sitting on the sofa in the evening. Brrr... And the ultrasonic humidifier in the bedroom got gross.
With either setup, we were still getting shocked.
Looking at our bills, we may be paying $10-15/month above baseline for the steam humidifier and the warm floor in the bathroom, which is another story.
In your case, a flow through would probably be cheaper to run and work well enough.