What is the maximum allowable horizontal length for a vent connector based on its diameter according to the IFGC?

The maximum allowable horizontal length for a vent connector is determined by the diameter of the connector and is based on guidelines outlined in the International Fuel Gas Code (IFGC). Specifically, the code stipulates that for each inch of the diameter of a vent connector, the horizontal length should not exceed 1.5 feet. This guideline ensures that the vent connector operates effectively and maintains proper airflow, which is crucial for the safe removal of combustion gases.

Using a proportional measurement, if the diameter of the vent connector is, for instance, 3 inches, the maximum horizontal length would then be 4.5 feet (3 inches x 1.5 feet). This directive helps prevent issues like backdrafting and ensures that the venting system functions correctly. Proper adherence to these measurements is vital for maintaining efficiency and safety in venting systems, making it essential knowledge for anyone involved in mechanical practices related to gas appliances.