A refrigerator includes a cabinet and a refrigeration system having an evaporator. An ice-making compartment is positioned within the cabinet and includes a housing defining an inlet aperture on an upper portion of the housing and an outlet aperture. An ice storage bin is positioned in a lower portion of the housing. An ice tray is positioned above the ice storage bin. An inlet duct is in fluid communication with the inlet aperture and is configured to direct air into the housing from the evaporator. The inlet duct includes a first branch having a plurality of first branch channels to direct air to a plurality of first branch locations on a first surface of the ice tray. A second branch of the inlet duct directs air to a second surface of the ice tray. An outlet duct is in fluid communication with the outlet aperture and is configured to direct air from the housing to the evaporator.