In DS' room the humidifier is on the wooden built in bookshelf ledge on top of a towel. It is not a crane fwiw. For DD's nursery, I am getting a crane and from experience with my mom's it needs to be elevated at least a little off the ground. So I plan on putting it on the dresser with a towel underneath it as well.
We have hardwood floors throughout our house. I put plastic/rubber pet placemats with rims underneath humidifers to protect the floor. Something like this: http://www.petco.com/product/113796/Petco-Oval-Pet-Food-Placemat.aspx
when we put ours in our room, it went on the carpet. just be sure it's not directly blowing on any wood furniture. we had no issues when it was on the floor.
right now ours is on top of the fridge downstairs. the one that will be in DS' room will go on the dresser, i'm not worried about it damaging the wood. we have the teardrop and it points up... we've never had any problems with condensation/moisture at any point in time with the one we've had (and used all winter long) for 3 years.
MissYouDietCoke:I bought a 99 cent square plastic plate from target to set the humidifier on. All of it sits on the carpeted floor in DS's room!
I read the manual and it says not to put on carpet or put a towel under it. I didn't think it would hurt anything but don't really want to go against what it said...