What is the minimum vertical height a B-Type vent must extend above the highest connected flue collar?

For a B-Type vent, the minimum vertical height it must extend above the highest connected flue collar is 5 feet. This requirement is crucial in preventing backdrafts and ensuring proper ventilation for gas appliances. The height allows for adequate dispersion of combustion gases, maintaining safety and efficiency in the ventilation system.

The 5 feet requirement is established to create a reliable upward flow of gas, which is vital for preventing the buildup of harmful gases in enclosed spaces. It helps maintain the proper draft, which is necessary for the safe operation of vented appliances. Essentially, the specified height helps to ensure that the gases can rise and disperse safely above the roofline, away from windows and other openings.

Understanding this height requirement is essential for compliance with local codes and standards, as well as for the safety of the installation. Thus, the clear specification of 5 feet in vertical height for B-Type venting is fundamental to its function and efficiency.