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.
Fans should be at least 7 feet from the floor and 18 inches from any wall. If a room has a ceiling height higher than 8 feet, then it is preferable to mount the fan 8 to 9 feet from the floor to allow for optimal air circulation. A standard mount comes with a rod that is 3 to 5 inches in length. ceiling fan is a money-saving investment as well as a way to cool a room. Many fans have a reverse switch that is used during cooler days to push the warm air down from the ceiling and circulate the warm air.