The research for the economic data base in support of SPC 90.2 was divided into three data base tasks: Task 1: Residential Energy Prices Task 2: Residential Thermal Envelope Energy Construction Techniques Task 3: Residential HVAC Equipment The results and descriptions of this research are presented in the following sections. Each data base has been produced in cooperation with ASHRAE and the National Association of Home Builders. Succeeding drafts have included additional data reflecting new requirements and input from members.