What is an ERV / Green Building & Sustainable Home Renovation Information & Advice

...an ERV and an HRV? How to choose between an HRV and an ERV? How much fresh air is required in homes and the best way to provide it are important issues. Energy recovery from exhaust air is becoming common place in cold regions, and two types of equipment can do this - an HRV (Heat Recovery Ventilation) and an ERV (...

...what is an ERV? Energy Recovery Ventilation (ERV) is the process of exchanging the energy contained in normally fan extracted stale or humid air from homes and using it to treat (precondition) the incoming outdoor fresh air in residential and commercial HVAC systems. During warmer days, an ERV system pre-cools and dehu...