A refrigerator having a compartment assembly, said compartment assembly comprising: • a housing subassembly defining a generally enclosed volume; • an air outlet in fluid communication with the enclosed volume for providing chilled air thereto; and • a divider unit separating the enclosed volume into first and second compartments (22, 24), the divider unit including: • a central wall aligned with the air outlet and exposing respective portions (28, 30) of the air outlet to the first and second compartments (22, 24); • a flap disposed within the air outlet and rotatable about an articulation axis aligned with respect to the central wall and with a body of the flap extending in an upstream direction within the air outlet; and • a control element mounted external to the enclosed volume and operably coupled with the flap to drive rotation thereof, characterized in that the divider unit further includes a post rigidly coupled with the flap at the articulation axis to mount the flap within the air outlet, the post extending within an interior of the divider unit, and wherein the post includes a first link arm extending perpendicularly therefrom, the control element including a knob rotatably mounted on a housing of the divider unit about an axis perpendicular to the post and a second link arm extending perpendicular to the axis and slidably engaged with the first link arm. • a housing subassembly defining a generally enclosed volume; • an air outlet in fluid communication with the enclosed volume for providing chilled air thereto; and • a divider unit separating the enclosed volume into first and second compartments (22, 24), the divider unit including: • a central wall aligned with the air outlet and exposing respective portions (28, 30) of the air outlet to the first and second compartments (22, 24); • a flap disposed within the air outlet and rotatable about an articulation axis aligned with respect to the central wall and with a body of the flap extending in an upstream direction within the air outlet; and • a control element mounted external to the enclosed volume and operably coupled with the flap to drive rotation thereof, characterized in that the divider unit further includes a post rigidly coupled with the flap at the articulation axis to mount the flap within the air outlet, the post extending within an interior of the divider unit, and wherein the post includes a first link arm extending perpendicularly therefrom, the control element including a knob rotatably mounted on a housing of the divider unit about an axis perpendicular to the post and a second link arm extending perpendicular to the axis and slidably engaged with the first link arm. • a central wall aligned with the air outlet and exposing respective portions (28, 30) of the air outlet to the first and second compartments (22, 24); • a flap disposed within the air outlet and rotatable about an articulation axis aligned with respect to the central wall and with a body of the flap extending in an upstream direction within the air outlet; and • a control element mounted external to the enclosed volume and operably coupled with the flap to drive rotation thereof, characterized in that