How often should combustion air and vent pipes be supported when installing a direct-vent high-efficiency condensing furnace?

Support for combustion air and vent pipes is critical in ensuring the safe and effective operation of a direct-vent high-efficiency condensing furnace. The correct practice involves providing support every 5 feet. This frequency of support helps to prevent undue stress on the pipes, allowing them to maintain their structural integrity and functionality.

Combustion air and vent pipes must be securely fastened to prevent sagging or misalignment, which can lead to potential hazards such as blockages or leaks. By supporting the pipes every 5 feet, installers can ensure that the system operates efficiently while also adhering to safety and building codes, which often dictate specific installation practices for venting systems. Proper support contributes to the longevity of the piping and the overall reliability of the heating system.

The options suggesting longer distances between supports do not provide the necessary security for the installation, as longer spans could allow for movement or sagging of the pipes, potentially leading to complications with the exhaust of combustion gases or intake of air. Thus, the best practice of supporting every 5 feet helps maintain the intended function of the system while ensuring safety.