The U.S. Department of Energy?s (DOE) Building Technologies Office (BTO) developed the Prioritization Tool to improve its programmatic decision-making by evaluating the long-term impact to energy consumption by technologies and activities. The tool provides an objective framework for most energy-saving measures and scenarios as well as methodology comparing long-term benefits and end-user costs applied to various markets, end-uses, and lifetimes. BTO seeks comments and information related to the Prioritization Tool that improves the tool's accuracy, applicability and influence technology planning within BTO. Specifically, this notice solicits comments and information on data, assumptions and outputs of various energy efficiency technologies and activities analyzed by the Prioritization Tool. The purpose of this Request for Information (RFI) is to gather feedback from stakeholders prior to DOE potentially issuing a Funding Opportunity Announcement (FOA). This RFI is not a FOA; therefore, DOE is not accepting applications at this time. All responses to this RFI must be provided as an attachment (in Microsoft Word format) to an e-mail message addressed to BTO_P_Tool_RFI@go.doe.gov. Responses must be received no later than 05:00PM EDT on 12/24/2013. The full content of the announcement can be found on the EERE Exchange website at https://eere-exchange.energy.gov.