Ventilation systems and methods for internal cabins of vehicles

A method for a system including one or more distribution nozzles associated with a seat within an internal space, a return air grill associated with the seat, wherein the return air grill is attached to seat track fittings of the seat, wherein the seat track fittings secure the seat to the floor within the internal space, a side return air plenum grill secured to one or both of a sidewall or a floor of the internal space, and an air conduit fluidly coupling the return air grill to the side return air plenum, the method comprising:

• associating the one or more distribution nozzles with the seat within the internal space;
• associating the return air grill with the seat;
• securing the side return air plenum to one or both of the sidewall or the floor of the internal space;
• fluidly coupling, by the air conduit, the return air grill to the side return air plenum;
• and
• directing airflow from the one or more distribution nozzles toward and into the return air grill.

A vehicle comprising:

• an internal cabin;
• a plurality of seats within the internal cabin;
• and
• a ventilation system comprising:
• one or more distribution nozzles;
• a return air grill associated with each of the plurality of seats, wherein the return air grill is attached to seat track fittings of one or more of the plurality of seats, wherein the seat track fittings secure the plurality of seats to the floor;
• a side return air plenum secured to one or both of a sidewall or a floor of the internal cabin;
• and
• an air conduit fluidly coupling the return air grill to the side return air plenum,
• wherein airflow is directed from the one or more distribution nozzles toward and into the return air grill.