由于通风供暖设备的年度运行效率受燃烧器燃料和燃烧空气调节的影响，因此在确定年度能源需求时，区分不同类型的控制非常重要。能源部（DOE）已经为单级恒温器控制的熔炉制定并实施了评估年度效率的测试程序。有必要修改试验程序，以说明燃油调节操作。最近开发了一种适用于两种燃油调节控制装置的修订程序。在降低和最大燃烧率下进行试验，计算并加权两种燃烧率的部分负载效率，以获得加权年效率。 天气数据的bin分析用于获得室外平均温度，以计算渗透损失和使用的加权分数。这些试验方法和计算程序基于并扩展了现行的DOE中央热风炉单级恒温器控制试验程序。通过使用开发的程序，评估了燃油调节控制与使用调节燃烧空气相结合时的节能效果。通过燃料和燃烧空气调节的效率提高，确定了从6%到20%的节能。效率的提高取决于节温器控制的类型和最小到最大的燃油输入，即调节比。引用: Ashrae Transactions，1983年，第89卷，第1页。1B，大西洋城，新泽西州

As annual operating efficiency of vented heating equipment is affected by burner fuel and com-bustion air modulation, it is important to differentiate between the various types of controls in determining annual energy requirements. Test procedures for evaluating annual efficiency have already been developed and implemented by the Department of Energy (DOE) for furnaces with single-stage thermostat control. A modified test procedure is necessary to account for operation with fuel modulation. A revised procedure that accommodates two types of fuel-modulating controls has recently been developed. Tests are conducted at reduced and maximum firing rates, and part-load efficiencies for the two firing rates are calculated and weighted to obtain a weighted annual efficiency. A bin analysis of weather data is used to obtain outdoor average temperatures for calculating infiltration losses and for the weighting fractions used. These test methods and calculation procedures are based on and are an extension of the current DOE test procedures for the single-stage type of thermostat control of central warm air furnaces.By using the procedures developed, the energy-savings impact of fuel-modulating controls when combined with the use of modulated combustion air is evaluated. Energy savings from 6% to 20% were determined from the increase in efficiency with both fuel and combustion air modulation. Improved efficiency was dependent on the type of thermostat control and the minimum-to-maximum fuel input, i.e., turndown ratio.