All of the following statements about compressor mufflers are true except for which?

Compressor mufflers play an important role in HVAC systems, particularly in reducing noise generated by compressor operation. The correct choice highlights that they are not limited to being located on intake openings only. While it is true that mufflers can be present on intake openings to diminish the noise produced by air entering the compressor, they can also be found on discharge openings where the noise from the exhaust can be quite significant.

Mufflers are designed to minimize sound levels across various parts of the compressor system, ensuring a quieter operation overall. Additionally, they can contribute to system efficiency by reducing the turbulence and related losses associated with sudden changes in pressure, as they help to smooth airflow. This improvement in efficiency, alongside their function in modern compressors, further enhances their importance in HVAC applications.

In contrast, the other statements about compressor mufflers being capable of reducing noise pollution, improving efficiency, and being used in various compressor types correctly reflect their multifunctional advantages in HVAC systems.