Energy codes for buildings are designed to set minimum legal standards for the energy efficiency of new homes. That is a good thing for the environment because it lowers carbon emissions. It’s also good for your bank account because houses built to stronger codes are up to 44% more efficient. This can save you hundreds of dollars a year on energy costs. The two hypothetical properties in the example below—a 1983 house and a 2012 house—show the evolution of the average home and a side-by-side comparison of how energy codes make such a big difference in home energy efficiency.
Click the image on this page to enlarge, or download the PDF below.