42 U.S.C. § 8235: “Residential building” defined

As used in this part, the term “residential building” means any building used as a residence which is not a new building to which final standards under sections 6833(a) and 6834 1 of this title apply and which has a system for heating, cooling, or both. 1 See References in Text note below. to establish a program under which the Secretary of Energy may provide assistance to State and local governments to encourage up to four demonstration programs that make energy conservation measures available without charge to residential property owners and tenants under a plan designed to maximize the energy savings available in residential buildings in designated areas; and to demonstrate through such program prototype residential energy efficiency plans under which State and local governments, State regulatory authorities, and public utilities may participate in a cooperative manner with public or private entities to install energy conservation measures in the greatest possible number of residential buildings within their respective jurisdictions or service areas.”