A refrigerated merchandiser is provided including a case having a first case section. The first case section defines a first product display area and an air passageway. The air passageway supports a fan and is in fluid communication with an airflow inlet and an airflow outlet. The air passageway is at least partially defined by a refrigeration system including an evaporator. A portion of the air passageway is further defined by a plenum having a stepped profile configured to channel and adjust a direction of an airflow within the first air passageway prior to entering the evaporator. The refrigerated merchandiser may further include a second case section defining a second product display area and including a glass panel. A first airflow portion of an airflow is configured to flow through the airflow inlet toward the evaporator and a second airflow portion is configured to flow through a second airflow outlet via an evaporator bypass channel. The first airflow portion is cooled by the evaporator and the second airflow portion is uncooled by the evaporator. The second airflow portion may be further directed through the second airflow outlet over an exterior of the glass panel of the second case section. Possible advantages include keeping the display glass clear or smoothing the airflow in the first air passage before it enters the distributor, so as to have greater efficiency.
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