estimation of annual rather than instantaneous dehumidification performance of ventilation dehumidification systems, AHRI Standard 920 further defines a test protocol for measuring a system's "integrated seasonal moisture removal efficiency". This metric is analogous to the seasonal energy efficiency ratio (SEER) that is used to compare cooling energy efficiency of competing equipment.

Like the SEER test methodology, AHRI Standard 920 requires that the dehumidification equipment be tested at several discrete combinations of inlet air