What type of copper tube may be used in HVAC systems?

Copper tubing plays a critical role in HVAC systems due to its excellent thermal conductivity and corrosion resistance. The type of copper tube that is most commonly utilized in HVAC applications is type L.

Type L copper tube is characterized by its thicker walls compared to type M, which provides increased durability and is better suited for various pressures and temperatures that HVAC systems encounter. It is often used in both residential and commercial HVAC systems, particularly for refrigerant lines and hydronic heating applications. Its versatility makes it a preferred choice among HVAC professionals.

Other types of copper tubing have specific applications but are not as widely used in HVAC. For example, type K, while it has the thickest walls and is suitable for underground services, may be over-engineered for typical HVAC uses. Type M, while lighter and less expensive, has thinner walls which can limit its suitability for high-pressure situations typically found in HVAC systems. The term DMV does not refer to a recognized standard for copper tubes and is not applicable in this context.

The robustness and reliable performance of type L ensure that it meets the demands of HVAC systems effectively, which is why it is the preferred option in this scenario.