How far must any air inlet and flue gas outlet of an appliance terminate from the vent outlet of a liquid fuel supply tank?

The requirement for the distance between any air inlet and flue gas outlet of an appliance and the vent outlet of a liquid fuel supply tank is based on safety regulations designed to prevent potential hazards related to flammable vapors. A distance of 5 feet is specified to reduce the risk of flammable vapors entering the air inlet or the flue gas outlet, which could lead to a fire or explosion. This distance ensures adequate separation, allowing for proper venting and airflow while minimizing the chance of ignition sources coming into contact with vapor emissions from the fuel tank. Adhering to this standard is essential for maintaining safe operational conditions in heating systems that utilize liquid fuels.