Okay, Cinder - how about the old-fashioned, low-tech way of humidifying that also beautifies? It takes a little commitment on your part .... Houseplants! Get something like geraniums, that needs to be watered every couple days. By keeping the soil moist, you help keep the room air more moist. You only part is to commit to not eating the plants, or digging them up, okay? A few in each room would be perfectly quiet, and help humidify, too! No more zappy doggies! (And you can even, if you look, get scented geraniums, so the rooms smell nice, too!)