The new "AT-MU" line of chilled water fresh air makeup air handlers replace the draw-through (ducted) models and offer many improvments over the existing units. AT-MU air handlers are designed  for use in fresh air make-up systems where outside air is drawn in by the air handler, cooled, dehumidifed, and reheated to room temperature, and then ducted to various areas in the vessel. The unit consists of a water coil, valve, electric heater, and a blower mounted on a condensate pan with rubber isolation mounting feet.