HVAC - EPA Certification Practice Exam

In a split system HVAC unit, the component that is typically located outside is the condenser. The condenser plays a crucial role in the refrigeration cycle by releasing heat absorbed from the indoor space. It does this by compressing the refrigerant and then allowing it to flow through coils where it releases heat to the outdoor air, causing the refrigerant to condense from a gas back into a liquid.

The outdoor placement of the condenser is important because it allows for effective heat exchange with the surrounding air. The compressor, while crucial, is generally housed within the condenser unit. On the other hand, the evaporator is located inside the building, where it absorbs heat from the indoor air. The expansion valve, which regulates the flow of refrigerant into the evaporator, is also usually located inside. Understanding the layout and functions of these components helps to grasp the overall operation of HVAC systems.