It works really well and moves air great. No matter how tight you make it, it will slowly sink down to be shorter then what you want and NOTE, this is NOT a 20" fan!! It even says ON THE BOX 18" but I was told it is the right fan I purchased! If you don't mind it being 18", which is pretty big, and do not mind it not staying tall for very long, it is a great fan and not to noisy.