What does a high sensible heat ratio typically indicate about an HVAC system's performance?

A high sensible heat ratio indicates a greater proportion of sensible heat being removed by the HVAC system compared to latent heat. This scenario generally signifies that the system is more focused on reducing the air temperature rather than effectively removing moisture from the air. Consequently, with a high sensible heat ratio, the ability of the system to control humidity diminishes, leading to potentially uncomfortable indoor conditions where humidity levels remain elevated even though the air feels cooler. This imbalance can create issues, especially in humid climates where moisture removal is essential for comfort and energy efficiency.

While high sensible heat ratios can correlate with lower energy costs in specific conditions, they are not synonymous with effective humidity control, which is critical for overall comfort and performance of HVAC systems.