LoginThe energy recovery ventilators are tested according to ISO 16494 for static plate types (including two different test apparatus configurations), ISO 21773 for rotary types, or other relevant international and national testing standards. Indices such as the energy recovery ratio (effectiveness) and exhaust air transfer ratio (EATR) can be used when selecting products and integrating them into building ventilation systems. They are also used when calculating energy consumption. Effectiveness depends on airflow and the ratio between supply and return airflows, and proper coordination among mechanical ventilation components is important to maintain adequate ventilation and energy efficiency, thereby reducing heating and cooling needs as well as air conveyance, namely through lower specific fan power.
Many research papers have been published on energy recovery ventilation, but there is still limited guidance available for practitioners, particularly guidance based on the most recently developed standards for energy recovery ventilators.
A technical note was developed to provide guidance, primarily for ventilation and HVAC system designers on how to interpret test results presented in brochures and how to select and integrate products into ventilation and HVAC systems. This technical note covers both residential and non-residential applications, as well as static plate and rotary energy recovery exchangers.