The provision of garage door opener and installation together is standard practice for the dealers and retailers of electric devices designed to be professionally installed. These devices have single-piece rail which is delivered in a specially designed professional truck. The models with chain drive have a single-piece chain. The units for DIY installation have a rail, which consists of several pieces to enable transportation in a regular car. They typically have a chain drive which consists of a chain and a cable attached together.
The buyer can select an opener in line with his/her individual requirements and preferences. The device has to have sufficiently powerful opener that will be able to operate the door given its size and weight. Buyers can select from operators with chain drive, screw drive and belt drive. The choice of features and capabilities varies between brands and between models of the same brand. The installation process involves the assembly of the different parts, the mounting of the power unit and connecting it with the door.