The OpenERV is a decentralized Energy Recovery Ventilator that transfers clean outdoor air inside and moves polluted air outdoors, while harvesting around 85-90% of the heat energy. The device is designed to provide fresh air without the downsides of heating or cooling it. It has a high air flow rate, is extremely quiet, and has a long lifespan of over 50 years. The device can be controlled over WiFi and has optional features such as a HEPA filter and heavy duty attenuator.