序言这是ANSI Z83的第五版。4/CSA 3.7，商业和工业用非循环直接燃气加热和强制通风设备标准。它取代了2015年、2013年、2003年和1999年出版的之前版本。范围1。1本标准适用于新生产的非循环直接燃气供暖和强制通风设备，以下简称加热器，其目的是解决建筑物渗透问题，更换已排出的建筑物空气，补偿建筑物传导热损失，并提供外部空气通风。 进入加热器的所有空气直接从室外通过管道输送，加热器产生的燃烧产物被释放到被加热的气流中。本标准涵盖的加热器适用于工业和商业应用。本标准涵盖的加热器不适用于任何有睡眠区的区域。安装符合当地规范，或在没有当地规范的情况下，符合国家燃气规范ANSI Z223。1/NFPA 54，或天然气和丙烷安装规范CSA B149。 1.1.2本标准适用于设计用于加热排气温度为160°C的加热器？F（71摄氏度）或更低。1.3本标准仅适用于带有整体空气移动部件的成套加热器，即由制造商设计、编目和重复制造的加热器。1.4如果本标准中给出的测量值后跟其他单位的等效值，则第一个规定值应视为规范值。1.5美国独有的项目见第6条。 1.6第7.1.7条“参考出版物”中列出了加拿大独有的项目。第2条“参考出版物”包含本标准中特别引用的标准列表，以及这些引用标准的来源。1.8除非另有规定，否则本标准中提及的所有“psi”均应视为表压。1.9在本标准中，“应”用于表示要求，即用户为遵守本标准而应满足的规定；“应该”用于表示建议或建议但不需要的建议； “可”用于表示一个选项或在标准范围内允许的选项。注释随附条款不包括要求或替代要求；随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）以定义其应用。

PrefaceThis is the fifth edition of ANSI Z83.4/CSA 3.7, Standard for Non-recirculating direct gas-fired heating and forced ventilation appliances for commercial and industrial application. It supersedes the previous editions published in 2015, 2013, 2003 and 1999.Scope1.1This Standard applies to newly produced, non-recirculating direct gas-fired heating and forced ventilation appliances, hereinafter referred to as heaters, whose purpose is to address building infiltration, replace building air that is exhausted, offset building conduction heat loss and provide outside air ventilation. All air to the heater is ducted directly from outdoors and the products of combustion generated by the heater are released into the air stream being heated.Heaters covered by this Standard are intended for use in industrial and commercial applications. Heaters covered by this Standard are not intended for use in any area containing sleeping quarters. The installation conforms with local codes, or in the absence of local codes, in accordance with the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane Installation Code, CSA B149.1.1.2This Standard applies to heaters designed for heated discharge air temperature of 160?F (71?C) or less.1.3This Standard is intended to cover only complete packaged heaters with integral air moving components, i.e., those which are designed by, cataloged by, and built on a repetitive basis by the manufacturer.1.4If a value for measurement as given in this Standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.1.5Items unique to the U.S.A. are shown in Clause 6.1.6Items unique to Canada are shown in Clause 7.1.7Clause 2, Reference publications, contains a list of standards specifically referenced in this Standard, and sources from which these referenced standards may be obtained.1.8All references to "psi" through this Standard are to be considered gage pressure unless otherwise specified.1.9In this Standard, "shall" is used to express a requirement, i.e., a provision that the user shall satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the standard.Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.Notes to tables and figures are considered part of the table or figure and may be written as requirements.Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.