What is a common disadvantage of forced warm air heating systems?

Forced warm air heating systems are designed to move heated air through ducts and into living spaces. One common disadvantage of this type of system is that it can be quite noisy, especially if the system is not properly designed or installed. Various factors can contribute to the noise level, including the speed of the blower, the size of the ducts, and how the air circulates within them. Noise may also arise from vibrations or turbulent airflow as air moves through ductwork.

In contrast, while forced warm air systems can ideally be energy-efficient, improper design can lead to inefficiencies that negate energy savings. Additionally, although the requirement for complex ductwork can be viewed as a disadvantage, it is not as universally applicable as the noise issue, which is often experienced by users regardless of the specific configuration of the duct systems. The portability aspect does not apply to typical installations of forced air systems, as they are primarily designed for permanent settings.