根据热力学第一定律，在低能和低火用建筑中，辐射供暖和制冷具有良好的能效记录。然而，随着最近对全球变暖和环境退化的担忧，能源质量（即热力学第二定律中供需之间的火用平衡）也正在成为一个主导因素。尤其是在辐射板加热和冷却方面，为了实现辐射加热和冷却的好处，并认识到潜在的局限性，需要一种新的计量方法来指导设计师选择合适的能源质量和数量供应链。 引文:内华达州拉斯维加斯ASHRAE会议论文

In low-energy and low-exergy buildings, radiant heating and cooling are known to have a good track record of energy efficiency in terms of the first-law of thermodynamics. With recent concerns of global warming and environmental degradation however, quality of energy aka exergy balance between the supply and demand in terms of the second-law of thermodynamics is also becoming a dominant factor. Especially in radiant panel heating and cooling a new metrication that may guide the designer to choose the right supply chain for both quality and quantity of energy is needed in order to realize the benefits of radiant heating and cooling and to recognize potential limitations.