The Facility Energy Decision System (FEDS) is an easy-to-use building energy efficiency software tool that quickly and objectively identifies energy efficiency improvements that maximize life-cycle savings.

• Models energy and cost performance of heating, cooling, ventilation, lighting, motors, plug loads, building shell, and hot water systems, plus central plants and thermal loops.
• Calculates energy consumption and electrical demand for each technology, end use, building, and the entire campus or installation.
• Evaluates thousands of candidate energy efficiency options via a site optimized life-cycle cost minimization process.
• Reports investment requirements, net present value, and payback period, plus pre- and post-retrofit energy consumption and costs, and air emissions impacts including greenhouse gases.

The basics about renewable energy and energy efficiency technologies: learn how they work, what they're used for, and how they can improve our lives, homes, businesses, and industries.