这是一个文本搜索PDF。范围详细说明燃气低强度红外加热器和红外辐射管加热器的测试和检查标准，每个燃烧器的输入功率不超过400000 Btu/h（117.23 kW）。这些设备用于天然气、人造气、混合气、液化石油气（丙烷）和液化石油气-空气混合物。如果规定了从一种气体到另一种气体的简单转换，这些设备可以与天然气和液化石油气（丙烷）气体一起转换使用。这些加热器适用于室外空间或非住宅室内空间的安装和加热。低强度红外加热器和红外辐射管加热器可以悬挂在头顶上、角度安装在头顶上、壁挂式或落地式。

This is a text searchable PDF.Scope Details test and examination criteria for gas-fired low-intensity infrared heaters and infrared radiant tube heaters with inputs up to and including 400,000 Btu per hour (117.23 kW) per burner.These appliances are for use with natural gas, manufactured gas, mixed gas, liquefied petroleum (propane) gases and LP gas-air mixtures.These appliances may be convertible for u se with natural gas and liquefied petroleum (propane) gasses, when provision is made for a simple conversion from one gas to the other.These heaters are intended for installation in and heating of outdoor spaces or nonresidential indoor spaces.Low-intensity infrared heaters and infrared radiant tube heaters may be suspended overhead, angle mounted overhead, wall mounted or floor mounted.