ERV/HRV – Ratio of supply and exhaust ducts

I recently moved into a home that is 25 years old. All of my previous homes were newish and had HRVs. Proper ventilation and indoor air quality are important to… I recently moved into a home that is 25 years old. All of my previous homes were newish and had HRVs. Proper ventilation and indoor air quality are important to…Read MoreGreenBuildingAdvisor