Did you know that a single-family home in Minneapolis, Minn. with ductwork in an unvented attic, insulated and air sealed with spray foam saves — on average — 5,638 kWh per year more than the same home with ductwork in a vented attic, insulated and air sealed with other products? That converts to a GHG reduction of 1,556 kilograms (kg) of carbon dioxide (CO2) per year, which is equivalent to reducing a car’s emissions by 33% annually!1 more.