Wadbros ERV (Energy Recovery Ventilator) is a mechanical ventilation system that provides a dual-airflow mechanism to exhaust stale indoor air and supply fresh outdoor air. The system recovers energy during the air exchange process by transferring heat between the outgoing and incoming air streams. In summer, it rejects heat from the incoming air and transfers it to the outgoing stale air, while in winter it retains heat and transfers it to the incoming fresh air. This process helps maintain optimal indoor air quality. The system filters common pollutants such as PM2.5, PM10, VOCs, allergens, and microbes. It also includes an activated carbon filter to neutralize unpleasant odors from incoming air.