除热器已被越来越多地用作去除光源产生的能量的装置，尤其是在内部空间。照明水平的提高有助于将注意力集中在散热上，因此使用了灯具和通风天花板。1966年，空气扩散委员会（ADC）制定了一个测试程序，并发布了一个测试代码（TC 66），用于散热套管的热评估。ADC建立了一个用于全行业测试的设施。此外，ADC的一些制造商安装了必要的设备来执行这些测试。从那时起，已经测试了大量的troffer配置和尺寸，并获得了足够的数据，作者认为这些数据可以进行比较，并从中得出一般性的结论。 1968年1月，照明工程学会（IES）发布了传热灯具光度和热测试小组委员会的报告。描述了测试方法以及仪器、数据简化和数据表示的规范。本文引用了鲍尔曼、米勒和邦瓦莱及其同事的作品作为参考。作为该方法的一部分，确定并批准使用三种类型的热量计；零热损失、校准热损失和连续流体流量量热计。这三种方法都需要控制热量计（静压箱）温度或热量计表面温度，后者可以将热量计的热损失降至零。在这些条件下，在实践中很少出现的情况下对踏步器进行测试:例如，只有在高回风流量下，增压室温度才会接近环境温度，从而将增压室热损失降至接近零。 ADC-TC 66规定的热量计是“校准热损失”和“连续流体流动”类型的组合，如下所述。IES方法强调热量计温度的控制，而ADC热量计允许温度浮动。作者认为，这种方法比IES代码提供了更真实的数据。IES方法将给出散热值，该值大约等于使用ADC方法确定的散热加热量计损失。引文:ASHRAE交易，第77卷，第2部分，华盛顿特区

Heat removal troffers have seen increasing use as devices for removing, approximately at the source, energy generated by lights, particularly in internal spaces. Increased lighting levels have helped to focus attention on heat removal with the resulting use of luminaires and ventilated ceiling plenums.In 1966 the Air Diffusion Council (ADC) formulated a test procedure and published a test code (TC 66) for the thermal evaluation of heat removal troffers. A facility for industry-wide tests was established by ADC. In additionsome manufacturers belonging to ADC installed the necessary apparatus to perform these tests. Since that time, a large number of troffer configurations and sizes hav~ been tested and sufficient data have been obtained which the authors feel can be compared and from which generalized conclusions can be drawn.In January, 1968, the Illuminating Engineering Society (IES) published the report of the Subcommittee on Photometric and Thermal Testing of Heat Transfer Luminaires. Test methods were described along with specifications for instrumentation, data reduction and data presentation. The work of Ballman, Mueller and Bonvallet and their coworkers are cited as references. Three types of calorimeters are identified and approved for use as part of this method; the zero heat-loss, the calibrated heat-loss and the continuous fluid-flow calorimeter. All three require control of the calorimeter (plenum) temperature or control of the calorimeter surface temperatures, the latter to reduce the calorimeter heat loss to zero. With these conditions, the troffer is tested under situations which seldom occur in practice: for example, only with high return air flow rates will the plenum temperature approach the ambient temperature thereby reducing the plenum heat loss to near zero.The calorimeter specified by ADC-TC 66 is a combination of the "calibrated heat-loss" and the "continuous fluid-flow" type and is described below. The IES method stresses the control of the calorimeter temperature whereas the ADC calorimeter permits the temperature to float. It is the opinion of the authors that this method provides more realistic data than the IES Code. The IES method will give values of heat removal which are approximately equal to the heat removal plus calorimeter loss as determined using the ADC method.