A herniated disk, sometimes (incorrectly) called a slipped disk, is a common cause of severe back pain and sciatica. A disk in the lumbar area becomes herniated when it ruptures or thins out, and degenerates to the point that the gel within the disk (the nucleus pulposus) pushes outward.
The ceiling fan's downrod must be long enough for the fan's blades to clear the ceiling. A fan with a 12-inch downrod works for a vaulted ceiling with a one-quarter-to one-third-inch pitch. An 18-inch downrod is sufficient for a pitch that is five-twelfths to one-half inch.
Originally, it was recommended that ceiling fans sit between 8-10 feet off the floor for both form and function. With todayâs newer homes and the higher, more open ceiling spaces, it is recommended to set your ceiling fan blades between 9 and 11 feet from the floor (the closer, the more effective).