Word-of-the-Month: Energy Recovery Ventilation (ERV)
Energy Recovery Ventilation (ERV) is the recovery process of exchanging the energy contained in a normally exhausted building and using it to treat (precondition) the incoming outdoor ventilation air in HVAC systems.
During the warmer seasons, the system pre-cools and dehumidifies while humidifying and pre-heating in the cooler seasons. The benefit of using ERV is the ability to meet ventilation and energy standards while improving indoor air quality and reducing total HVAC equipment capacity.
There are four types of ERVs for different applications, including a rotary heat exchanger, plate heat exchanger, heat-pipe heat exchanger, and runaround coils. This technology has been around for more than 20 years.
Stahl is using an ERV system for the renovation of Wallace Elementary School in Johnston, IA.