NASEO released a new publication, Utilizing Home Energy Score to Prioritize Energy Efficiency Investments, outlining how State Energy Offices can prioritize residential energy efficiency spending. The paper proposes using Home Energy Score to identify the neighborhoods with the largest need for energy efficiency improvements. The Home Energy Score provides the energy efficiency of a home on a 1-to-10 scale and estimates the 1-to-10 result when improvements are made. The result is a delta between current and potential Home Energy Score that represents the magnitude of the need for energy efficiency improvements. The paper also reviews energy vulnerability terms to establish the need for this us of Home Energy Score.