Our installation plan is designed to be as simple and easy to read as possible. It includes a legend that corresponds to all of the symbols used and relevant heating element information. In the installation plan, the start of the heating product is represented by triangle between two lines. The heating product will need to be installed by following the rest of the directional arrows. Turns and "free-form" areas are visually represented by call-outs in the installation plan. For cable heating elements, the half-way point on the plan is marked with a red circle. The end point of your heating product is always represented with a black square.