Abstract: A compounding pharmacy includes at least one clean room for manually mixing pharmaceutical ingredients to form a specialized product. The at least one clean room has a heating, ventilation, and air conditioning with fluid paths that extend from at least one air intake to an exhaust within the at least one clean room. Each of the at least two fluid paths has at least two air dampers that can be selectively opened to allow flow through the respective fluid path or closed to prevent flow through the respective fluid path. Each of the at least two fluid paths include at least one evaporator coil. The at least one evaporator coil includes at least one tube for conveying a cooling fluid and a plurality of fins. The at least one tube and the plurality of fins of the at least one evaporator coil are made of aluminum or an aluminum alloy.