We installed 2 of the 16 footers in a pillow factory. When we powered them up all the pillow stuffing on the floor moved immeditaly to the outside walls. These units are quiet and powerful. The units I put in came with a VFD so the speed adjustment was easy. The supplied bracket was capable of hanging on a vaulted ceiling. These things are HEAVY, over 100 lbs so a lift is required, you will not be able to carry them up a ladder and install them. Just my 2 cents.
Life is tough, Life is tougher when you are stupid