Energy Recovery Ventilators (ERVs) are devices designed to improve indoor air quality while conserving energy. They work by exchanging stale indoor air with fresh outdoor air, transferring heat and moisture between the two airstreams. This process helps maintain comfortable humidity levels and reduces the energy needed for heating or cooling. ERVs are particularly beneficial in tightly sealed buildings, where natural ventilation is limited. By using heat exchangers, they minimize energy loss, making them an efficient choice for both residential and commercial spaces. Overall, ERVs contribute to healthier indoor environments and lower energy costs.