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UL 998 Ed. 6-2020
Humidifiers - Published Date: July 5, 2022
These requirements cover humidifiers rated 600 V or less, and intended to be used in accordance with the National Electrical Code (NEC), ANSI/NFPA 70, and the rules of CSA C22.1, Canadian Electrical Code(CEC),PartI. These requirements cover humidifiers intended for residential and commercial use. This includes humidifiers of the centrifugal atomizing type, evaporative-media type, water-injection type, steamtype, and the like. The humidifiers are intended for installation in a room, mounted on a wall or a ceiling, or for duct orplenummounting. These requirements apply to equipment that includes an electric heating element to heat air or water, or both. These requirements do not apply to evaporative coolers that a real so intended to be used for cooling. These requirements do not apply to portable, electrode-type products, such as vaporizers, which are covered by UL 499 and CAN/CSA-C22.2 No.64.
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