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.
For ceilings this height we recommend a flush mount ceiling fan. 9ft â 10ft 6â. For ceilings this height we recommend a 12â drop rod. Our flush mounted ceiling fans-the Mayfair, Capri, Gemini and Amalfi-require a Conversion Kit to fit a drop rod.