立法要求美国联邦政府的每个机构到2015年将其建筑物的总能源使用指数降低30%，与2003年的基准相比。拨款可用性的下降意味着能源绩效合同将是实现这一目标的关键。然而，从历史上看，能源绩效合同仅能比基线减少20%左右的能源使用。通过绩效合同实现30%的节能需要能源服务公司（ESCO）和机构采取新的方法，并将重点放在实现更高的节能上。本文描述了联邦机构应对这一挑战的一些方式，并介绍了美国总务管理局（U.S.General Services Administration）为在传统节能绩效合同中实现更深层节能所做努力的结果。引文:伊利诺伊州芝加哥ASHRAE交易——第121卷第1部分

Legislation requires each agency of the United States Federal Government to reduce the aggregate energy use index of its buildings by 30% by 2015, with respect to a 2003 baseline. The declining availability of appropriated funding means that energy performance contracting will be key to achieving this goal. Historically, however, energy performance contracts have been able to reduce energy use by only about 20% over baseline.Achieving30%energy reductions using performance contracting will require new approaches and a specific focus on achieving higher energy savings, both by energy services companies (ESCOs) and by agencies. This paper describes some of the ways federal agencies are meeting this challenge and presents results from the efforts of one agency -- the U.S. General Services Administration -- to achieve deeper energy savings in conventional energy savings performance contracts.