These operators provide an optimal application for general commercial or industrial use. They are suspended from the ceiling and are directly attached to the door for control
These operators work on a motor that powers a gear and chain, most commonly for rolling type doors. They are attached parallel to the door on the wall as opposed to suspended from the ceiling.
This opener is most common on residential doors. It utilizes a chain to pull or push a trolley that moves the door up and down. They are the most affordable type of operator and are overall most reliable.