Convertible top single package heat pump unit

Single package heat pump unit that comprises a cabinet that mounts onto an exterior wall of a structure and includes a return air duct in a back wall of the cabinet that communicates through a penetration in said exterior wall with room air in a comfort space within said structure, and a supply duct positioned on one of a top wall and said back wall of the cabinet to communicate through a penetration in said structure with said comfort space to supply treated air thereto;

• a room air heat exchanger within said cabinet for treating room air that flows into said cabinet through said return air duct;
• blower means in said cabinet for discharging the treated air out through said supply duct to said comfort space;
• and outdoor heat exchange means in said cabinet for exchanging heat with an outdoor environment;
• wherein said cabinet includes a reversible supply duct panel that has one blank wall portion and one duct wall portion containing said supply duct, and means permitting removable attachment of the supply duct panel onto the cabinet in either of two configurations including a horizontal discharge configuration in which the blank wall portion of the panel is disposed on the top of the cabinet and the duct wall portion is disposed on the back of the cabinet, and a top discharge configuration in which the duct wall portion is disposed on the top of the cabinet and the blank wall portion is disposed on the back of the cabinet.