An air-handling system includes an evaporator core and a downstream arranged heater core disposed in an air-handling casing. A primary flow path is formed within the air-handling casing and leads to a primary zone of a passenger compartment. The primary flow path is divided into a primary cool air pathway bypassing the heater core and a primary warm air pathway passing through the heater core. A secondary flow path is formed within the air-handling casing and leads to a secondary zone of the passenger compartment. The secondary flow path includes a secondary cool air pathway branching from the primary flow path downstream of the evaporator core and a secondary warm air pathway branching from the primary flow path downstream of the heater core. The secondary cool air pathway bypasses the heater core and the secondary warm air pathway passes through the heater core.