If a trolley style operator is installed it would require an additional 2” of headroom to allow for the operator rail to be mounted above the door/track assembly. It requires a grounded outlet installed in the ceiling (by others) approximately 10’6” back from the center of the opening for a 7’ door.

If a side mounted jack-shaft operator is being installed it would require 3” above center of spring shaft, it also requires 1”-5” of spring shaft beyond the bearing plate and another 8” form the end of the shaft to the wall. It can be mounted on either side of the opening, and does require a grounded outlet within 6’ of the operator location.