In a mini split system, which lines typically need to be insulated?

In a mini split system, both the suction line and the liquid line require insulation to ensure optimal efficiency and performance of the system. The suction line, which carries refrigerant vapor from the evaporator back to the compressor, must be insulated to prevent it from absorbing heat from the surrounding environment. When the suction line is uninsulated, it can lead to increased temperatures of the refrigerant, which affects the efficiency of the system and can ultimately harm the compressor.

The liquid line, on the other hand, carries high-pressure refrigerant in liquid form from the condenser to the expansion device and should also be insulated to prevent condensation on the outside of the pipe. If the liquid line is not insulated, moisture from the air can condense on its surface and create water damage or mold issues in the surrounding areas.

Therefore, insulating both lines is essential for maintaining the intended temperature of the refrigerant, preventing energy loss, and ensuring a high-performance mini split system.