The energy retrofit of a building is the analysis and implementation of energy efficiency measures such as energy efficient equipment, air sealing, moisture management, controlled ventilation, insulation, and solar control so that dramatic energy savings are achieved alongside optimal building performance. One of the greatest barriers to improving energy efficiency in buildings is the high capital cost of projects.  However, new financing techniques for energy retrofits have developed which include anchor tenant financing, shared saving agreements, capital leases, power purchase agreements,  property assessed clean energy bonds, green leases, and on bill financing.  These innovative financing methods now make it easier to complete retrofits which result in cost savings as well as an increase in the value of the property.