To determine the correct length of Heat-Line electric heat tracing for pipes, first decide whether a factory-finished or cut-to-length system is suitable for your application. Factory-finished systems offer ease of installation since they do not require on-site termination. However, for custom installations, professional installers can opt for our Cut-To-Length series, which is terminated on-site. To determine the correct length for a factory-finished electric heat tracing for pipes, accurately measure the length of the pipe that requires freeze protection from the starting point to the end of the run. For detailed measuring instructions, refer to the measuring tab on each product page.