America’s existing housing needs help. Many of the 128 million homes in this country were constructed before modern energy and building codes were established. These homes often suffer from performance problems ranging from inflated energy consumption to poor thermal comfort to indoor air quality issues.

We are a national standards development and credentialing organization for residential energy efficiency retrofit work – providing training through a network of training affiliate organizations, individual certifications, company accreditations and quality assurance programs. As an independent, not-for-profit organization, we bring together leading building science experts from across North America to develop our standards using a consensus-based methodology.

The result? Sustainable, green-collar jobs in local communities that improve the comfort, health, safety, durability and energy efficiency of America’s existing houses.