该项目旨在开发和展示一套设计因素，以协助HVAC（供暖、通风和空调）设计工程师确定空间供暖和制冷系统中辐射和对流组合的尺寸和位置。利用这些因素，设计工程师可以最大限度地提高热舒适性，并将燃油消耗降至最低。设计因素采用建筑舒适性分析程序（BCAP）方法制定。该方法是通过RP-657《将平均辐射温度（MRT）纳入建筑和暖通空调系统设计的简化方法》（Jones and Chapman，1994）开发的。存在许多技术和标准来精确确定强制空气加热系统的尺寸，以提供设计空气温度。关于辐射供暖系统的尺寸和布置，几乎没有可用的信息。 对流和辐射组合系统的可用信息更少。在组合系统中，空间内对流和辐射加热能力的相对部分将随建筑形状和空气渗透率而变化。因此，任何针对这一复杂问题的分析方法都必须准确地涵盖建筑材料、供暖系统和运行条件。

The effort of this project was to develop and present a set of design factors to assist HVAC (Heating, Ventilation, and Air-Conditioning) design engineers in sizing and placing combined radiative and convective in-space heating and cooling systems. Using these factors, the design engineer may maximize thermal comfort and minimize fuel consumption.The design factors were developed using the Building Comfort Analysis Program (BCAP) methodology. This methodology was developed through RP-657, "Simplified Method to Factor Mean Radiant Temperature (MRT) into Building and HVAC System Design" (Jones and Chapman, 1994).Many techniques and standards exist to accurately size forced-air heating systems to provide a design air temperature. Little information is available for sizing and placing radiative heating systems. Even less information is available for a combination convective and radiative system. In a combined system, the relative portions of in-space convective and radiative heating capacities will vary with building shapes and air infiltration rates. Therefore, any analysis method for this complex problem must accurately encompass building materials, heating systems, and operating conditions.