Energy Recovery Ventilation (ERV) is a mechanical means of introducing fresh outside air and removing stale inside air.
An ERV provides the benefits of improved indoor air quality and also meets ASHRAE standards for new construction.
Back in the 1980’s when we had our major energy crisis, builders tightened up new homes which eliminated most of the normal outside air infiltration found in older homes. The new energy efficient homes presented a new problem which is known as SBS (Sick Building Syndrome). The ERV was designed to resolve this issue.
Main Benefit of an ERV
The main benefit of an ERV is that it continually introduces fresh air into a building while removing stagnant inside air. The ERV recovers energy from exhaust air to preheat the outside air. This reduces the load requirement of the HVAC unit and therefore reduces the required capacity of the equipment.