请注意:此版本的所有临时修订版将在您购买时提供。L型低温通风系统SUL 6411范围1。1这些要求包括工厂制造的通风管道和配件，这些管道和配件用于提供通风系统，以便与排放低温烟气的气体和液体燃料燃烧设备一起使用，并经批准与L型通风系统一起使用。1.2 L型低温通风系统的安装和使用要求包含在烟囱、壁炉、通风口和固体燃料燃烧设备标准NFPA 211中，以及BOCA基本/国家机械规范、标准机械规范和统一机械规范等规范中。1.3对于包含新特性、特性、组件、材料或系统的产品，或与本标准要求所涵盖的特性、特性、组件、材料或系统不同的产品，以及涉及火灾、触电或人身伤害风险的产品，应使用适当的附加组件和终端进行评估- 保持本标准意图最初预期的安全水平的产品要求。如果产品的特征、特性、组件、材料或系统与本标准的特定要求或规定相冲突，则该产品不符合本标准。应按照制定、修订和实施本标准所采用的方法，提出并采用要求的修订。

Please note: All interim revisions for this edition available at time of your purchase will be included.Type L Low-Temperature Venting SystemsUL 6411 Scope1.1 These requirements cover factory-built vent piping and fittings constructed to provide venting systems for use with gas and liquid fuel-burning appliances that exhaust low-temperature flue gases and that are approved for use with Type L venting systems.1.2 Requirements for the installation and use of Type L low-temperature venting systems are included in the Standard for Chimneys, Fireplaces, Vents, and Solid-Fuel Burning Appliances, NFPA 211, and codes such as the BOCA Basic/National Mechanical Code, the Standard Mechanical Code, and the Uniform Mechanical Code.1.3 A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this standard, and that involves a risk of fire or of electric shock or injury to persons shall be evaluated using appropriate additional component and end-product requirements to maintain the level of safety as originally anticipated by the intent of this standard. A product whose features, characteristics, components, materials, or systems conflict with specific requirements or provisions of this standard does not comply with this standard. Revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this standard.