Abstract: An air-conditioning unit including a centrifugal blower for centrifugally blowing air having a generally horizontal axis a rotation and a scroll having an elongated discharge plenum above the blower and an air guide about the blower for directing air exiting the blower to the discharge plenum through a discharge port having first and second ends. The air guide has a radius from the rotational axis of the fan which increases from a cutoff point near the first end of the discharge port to the second end of the discharge port. The scroll also has a curved air foil located above the blower and to a side of the blower toward the second end of the discharge port. The air foil has a leading edge near the blower and a trailing edge in the discharge plenum effective to divert a portion of air exiting the blower toward the second end of the discharge port to equally distribute air across the discharge plenum.