Which of the following connects sections of trunk line in gas furnace installations?

The connection of sections of trunk line in gas furnace installations is typically made using S connectors. These connectors are designed specifically for ductwork and trunk line applications, allowing for flexible and secure connections between different sections of ducts. The S connector's design aids in maintaining an appropriate air seal and minimizes air leakage, which is crucial for efficient system performance and energy savings. Additionally, S connectors facilitate easier alignment and assembly of trunk lines, ensuring a smooth transition between sections.

Understanding the specific role of S connectors helps in recognizing their importance in the overall installation process, ensuring that the furnace operates efficiently and effectively. Properly connecting trunk line sections with S connectors contributes to optimal air distribution throughout the home, thereby enhancing overall comfort and performance.