The Emerging Technologies (ET) Program of the Building Technologies Office (BTO) supports applied research and development for technologies and systems that contribute to building energy consumption. BTO?s goal is to deliver 50% primary energy savings in the year 2030, relative to the baseline energy consumption projected by the 2010 Annual Energy Outlook. The ET Program is helping to meet this goal by enabling cost-effective, energy-efficient technologies to be developed and introduced into the marketplace. The ET Program maintains support for the national laboratories in five core areas: Solid-State Lighting, HVAC (includes water heating and appliances), Sensors & Controls, Windows & Envelope, and Modeling & Tools. This Funding Opportunity Announcement (FOA) combines an early-stage research and development topic (Innovations) with a later-stage research and development topic (Frontiers) that complement the core funding provided to the national l abs and allow all interested parties, including corporations, universities, and non-profits as well as the national labs, to contribute to advancement in two of these core technological areas: Non-vapor compression HVAC technologies and advanced vapor compression HVAC technologies. These topics are combined into this single, relatively large FOA in order to reduce administrative costs and to ensure that only the best applications are supported.