AIR TREATMENT APPARATUS

An agricultural vehicle has an operator environment (12) with a roof portion (22), and an air treatment apparatus installed within the roof portion. The air treatment apparatus comprises a vehicle HVAC system (26) having an inlet plenum, other HVAC components (50, 52) and an outlet to the operator environment (12). The air treatment apparatus further comprises an air filtration system having at least one external inlet (28) and first and second filtration devices (34, 40) located between the external inlet (28) and the HVAC inlet plenum. The roof portion (22) is a hollow structure having upper and lower surfaces and front, rear, left and right sidewalls, and the first and second air filtration devices (34, 40) are disposed along one of the left and right sidewalls within the hollow structure of the roof portion. The HVAC system (26) is preferably disposed along the rear sidewall within the hollow structure of the roof portion (22).