Multi split ?

Hi, I have a 1500 sq ft house in zone 4 ( close to DC).  I currently have a gas furnace and AC which is a downdraft and my ductwork… Hi, I have a 1500 sq ft house in zone 4 ( close to DC).  I currently have a gas furnace and AC which is a downdraft and my ductwork…Read MoreGreenBuildingAdvisor