A ventilation assembly (200, 308) comprising: a number of fan systems (202, 312) configured to purify air; and a number of air distribution assemblies (204, 314), each air distribution assembly of the number of air distribution assemblies (204, 314) configured to be removably installed on a seatback (326, 332, 338) of a passenger seat (328, 334, 340), and each air distribution assembly of the number of air distribution assemblies (204, 314) comprising: a pair of air distribution vents; ductwork configured to receive air from at least one fan system of the number of fan systems (202, 312) and direct air to the pair of air distribution vents; and a seat attachment device configured to removably couple the pair of air distribution vents to the seatback (326, 332, 338) such that each air distribution vent is situated on opposite sides of the seatback (326, 332, 338) for providing purified air to a seated passenger; and wherein the ventilation assembly further comprises a number of mounting plates, wherein each mounting plate of the number of mounting plates is configured to attach to a seat track of an aircraft (100, 300), and wherein each mounting plate of the number of mounting plates comprises a base configured to join to a fan system of the number of fan systems (202, 312). a number of fan systems (202, 312) configured to purify air; and a number of air distribution assemblies (204, 314), each air distribution assembly of the number of air distribution assemblies (204, 314) configured to be removably installed on a seatback (326, 332, 338) of a passenger seat (328, 334, 340), and each air distribution assembly of the number of air distribution assemblies (204, 314) comprising: a pair of air distribution vents; ductwork configured to receive air from at least one fan system of the number of fan systems (202, 312) and direct air to the pair of air distribution vents; and a seat attachment device configured to removably couple the pair of air distribution vents to the seatback (326, 332, 338) such that each air distribution vent is situated on opposite sides of the seatback (326, 332, 338) for providing purified air to a seated passenger; and wherein the ventilation assembly further comprises a number of mounting plates, wherein each mounting plate of the number of mounting plates is configured to attach to a seat track of an aircraft (100, 300), and wherein each mounting plate of the number of mounting plates comprises a base configured to join to a fan system of the number of fan systems (202, 312). a pair of air distribution vents; ductwork configured to receive air from at least one fan system of the number of fan systems (202, 312) and direct air to the pair of air distribution vents; and a seat attachment device configured to removably couple the pair of air distribution vents to the seatback (326, 332, 338) such that each air distribution vent is situated on opposite sides of the seatback (326, 332, 338) for providing purified air to a seated passenger; and wherein the ventilation assembly further comprises a number of mounting plates, wherein each mounting plate of the number of mounting plates is configured to attach to a seat track of an aircraft (100, 300), and wherein each mounting plate of the number of mounting plates comprises a base configured to join to a fan system of the number of fan systems (202, 312).