The energy recovery ventilators are tested according to ISO 16494 for static plate types (two different configurations of test apparatuses are included), ISO 21773 for rotary types or other relevant international and national testing standards. The indices such as energy recovery ratio (effectiveness) and exhaust air transfer ratio (EATR) can be referred to when products are chosen and integrated into ventilation systems in buildings. They are referred to also when energy consumption is calculated. The effectiveness is dependent on airflow and the ratio between supply and return air airflows, and total coordination among mechanical ventilation components is important for the sake of well-maintained amount of ventilation and energy efficiency for reducing heating and cooling needs and for air conveyance, namely for lower specific fan power.
There have been many research papers published on energy recovery ventilation, but there are still only limited documents for practitioners especially based on most recently developed standards on energy recovery ventilators.
A technical note will be developed to describe a guidance mainly for ventilation and HVAC system designers on how they can interpret the test results on brochures and how they should choose products and integrate into the ventilation and HVAC systems. This technical note will cover residential and non-residential uses, and static plate and rotary types of energy recovery exchangers.