Energy-efficient mortgage (EEM) cover the costs of energy upgrades. These mortgages let you roll the cost of those improvements into your home loan. With a really well-designed EEM, you end up not spending a cent for the energy measures. There are EEMs for remodeling (in some areas these are called energy improvement mortgages, or EIMS) and others for purchasing houses that are already considered energy efficient. The latter allows homebuyers to qualify for more house with less income because utility bills will be low.