An ERV (Energy Recovery Ventilator) is a type of mechanical ventilation system that helps to improve the air quality in a home or building. It works by exchanging the stale air inside with fresh air from outside, while at the same time recovering the energy from the outgoing air. This helps to reduce the amount of energy needed to heat or cool the air, resulting in lower energy bills. The ERV also helps to reduce the amount of pollutants and allergens in the air, making it a healthier environment for occupants. In addition, the ERV helps to reduce the amount of moisture in the air, which can lead to mold and mildew growth. The ERV is an important part of any home or building’s ventilation system, and can help to improve the air quality and reduce energy costs.