Water heater appliance exhaust system for recreational vehicles

A water heater appliance for a recreational vehicle, the water heater appliance defining a vertical direction, a lateral direction, and a transverse direction, the vertical, lateral, and transverse directions mutually perpendicular, the water heater appliance comprising:

• a cabinet defining a front side, a back side, a first side, and a second side;
• a heat exchanger positioned within the cabinet;
• a combustion chamber positioned within the cabinet, the combustion chamber comprising a burner assembly, the combustion chamber in thermal communication with the heat exchanger;
• an exhaust tube fluidly coupled to the combustion chamber;
• and
• an exhaust box defining a front side, a back side, a first side, a second side, a top side, and a bottom side, the exhaust box fluidly coupled to the exhaust tube at the back side of the exhaust box, the exhaust box comprising:
• a first divider extending between the first side and the second side of the exhaust box, the first divider positioned in line with the exhaust tube;
• a second divider extending between the first side and the second side of the exhaust box, the second divider positioned at least partially below the exhaust tube;
• and
• an exhaust outlet positioned at the front side of the exhaust box.