How four energy efficiency upgrades pay off
A study of four energy efficiency upgrades in a two-bedroom Nashville home shows how they can pay off in lower energy costs and reduced carbon dioxide emissions by lowering energy use. The costs don't include labor.
Sets of bar charts show how upgrading a refrigerator is cheap but has low CO2 reduction value. Adding a heat pump or new windows is expensive but pays off. The biggest value comes form insulating the attic, which is relatively affordable and quickly pays off in energy costs and reduction CO2 emissions from energy use.
