The Energy Recovery Ventilator (ERV) is an effective method to pre-condition the incoming fresh air. The fresh air is conditioned by the heat exchanger which recovers both latent & sensible energy from stale air without coming in direct contact with each other. The fresh air goes through a 3 stage Filtration process. The energy exchange core can reduce indoor energy loss through counter flow and convective flow technology, the polymer nanomaterial / ER Paper exchange core ensures the heat exchange rate is up to 70%.