范围1。1本标准适用于新生产的燃气无排气管房间加热器，用于连接房屋燃料供应系统（见第3条），以下简称房间加热器或器具，完全由新的、未使用的零件和材料制成，输入额定值高达40000 Btu/hr（11723 W），但以下情况除外:a）适合安装在卧室的无排气管房间加热器的输入额定值不超过10000 Btu/hr（2931 W）；和b）适合安装在浴室的无排气管房间加热器的输入额定值为6000 Btu/hr（1758 W）或更低。1.2本标准涵盖符合以下任一类型的无排气管房间加热器:a）从工厂装运，专门配备用于一种气体的加热器。不允许通过任何方式（包括使用套件）现场转换气体类型；orb）从工厂装运的通用无排气管房间加热器，配备有选择连接气体类型的开关装置。 1.3无排气管房间加热器为:a）用于天然气；b） 用于人造气体；c） 用于混合气体；d） 用于丙烷气体；e） 用于液化石油气-空气混合物；andf）用于仅用于天然气或仅用于丙烷气的制造（移动）家用售后安装。1.4通用无排气管房间加热器包括:a）用于丙烷和天然气，当提供从一种气体切换到另一种气体的切换装置时；andb）用于制造（移动）家用或移动家用售后安装，用于丙烷和天然气（当提供从一种气体到另一种气体的切换装置时）（见第4.1.5条）。1.5安装在浴室中的无排气管房间加热器应为壁挂式。安装在卧室中的无排气管房间加热器应安装在墙上，或安装在固体燃料燃烧的壁炉中。未排气的气体测井仪（见第3条），配有将燃烧器底座组件安装到固体地板上的装置- 燃烧燃料的壁炉应被视为符合安装在卧室或浴室的壁挂式要求。1.6第4.1.7条涵盖了与上述气体一起使用的无排气管房间加热器的构造。第5.1.8条涵盖了与上述气体一起使用的无排气管房间加热器的性能。本标准涵盖了从专门为一种气体配备的工厂装运的器具。不允许现场转换气体类型。1.9第1.3 f）、4.20.4和4.21.3 j）条概述了适用于制造（移动）家用售后市场安装的房间加热器的特殊构造规定。1.10如果本标准中给出的测量值之后是其他单位中的等效值，则第一个规定值应视为规范。1.11除非另有规定，否则本标准中提及的所有psi均应视为表压。 1.12第2条包含本标准中引用的标准清单，以及这些参考标准的来源。1.13在本标准中，“应”用于表示要求，即用户为遵守本标准而有义务满足的规定；“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。

Scope1.1This Standard applies to newly produced gas-fired unvented room heaters for connection to the house fuel supply system (see Clause 3), hereinafter referred to as room heaters or appliances, constructed entirely of new, unused parts and materials, having input ratings up to and including 40,000 Btu/hr (11,723 W) except:a) unvented room heaters suitable for installation in bedrooms have input ratings of 10,000 Btu/hr (2,931 W) or less; andb) unvented room heaters suitable for installation in bathrooms have input ratings of 6000 Btu/hr (1,758 W) or less.1.2This Standard covers unvented room heaters that comply with either of the following types:a) shipped from the factory equipped specifically for use with one gas only. Field conversion of gas types by any means including the use of a kit are not permitted; orb) a universal unvented room heater shipped from the factory equipped with a switching means for selecting the type of gas to which it is being connected.1.3Unvented room heaters are:a) for use with natural gas;b) for use with manufactured gas;c) for use with mixed gas;d) for use with propane gas;e) for use with LP gas-air mixtures; andf) for manufactured (mobile) home aftermarket installation for use with natural gas only or for use with propane gas only.1.4Universal unvented room heaters are:a) for use with propane and for use with natural gas when provision is made for a switching means from one gas to the other; andb) for manufactured (mobile) home or mobile home aftermarket installation for use with propane and for use with natural gas when provision is made for a switching means from one gas to the other (see Clause 4.1.5).1.5Unvented room heaters for installation in bathrooms are to be wall-mounted. Unvented room heaters for installation in bedrooms are to be wall-mounted or for installation in solid-fuel burning fireplaces. An unvented gas log (see Clause 3), provided with means for mounting the burner base assembly to the floor of the solid-fuel burning fireplace, shall be considered as complying with the wall-mounted requirement for installation in bedrooms or bathrooms.1.6The construction of unvented room heaters for use with the above-mentioned gases is covered under Clause 4.1.7The performance of unvented room heaters for use with the above-mentioned gases is covered under Clause 5.1.8This Standard covers appliances shipped from the factory equipped specifically for one gas only. Field conversion of gas types is not permitted.1.9Special construction provisions applicable to room heaters for manufactured (mobile) home aftermarket installation are outlined under Clauses 1.3 f), 4.20.4, and 4.21.3 j).1.10If 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.1.11All references to psi throughout this Standard are to be considered gauge pressure unless otherwise specified.1.12Clause 2 contains a list of standards referenced in this Standard, and sources from which these reference standards may be obtained.1.13In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to 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.