Scope 1.1 The requirements of this standard cover humidifiers rated at 600 V and less, used in accordance with the requirements of the ANSI/NFPA Code 70, National Electrical Code and the Canadian Electrical Code regulations. electricity, Part One. 1.2 These requirements apply to residential and commercial humidifiers. They include centrifugal spray, evaporative, water injection, steam and other humidifiers. These humidifiers must be able to be installed in a room or mounted on the wall, ceiling, in a duct or in a plenum. 1.3 The requirements of this standard apply to equipment that contains an electrical element that heats air, water or both. 1.4 These requirements do not apply to evaporative coolers that also serve for cooling. 1.5 These requirements do not apply to portable electrode products. The latter are treated as vaporizers and are covered by standards UL 499, and CAN/CSA-C22.2 No. 64. 1.6 Products presenting new functions, characteristics, components, materials or systems must be evaluated or different from those in use when the standard was developed and involving a risk of fire, electric shock or injury based on appropriate additional requirements on components and finished products considered necessary to protect the user according to the same level of safety than that initially envisaged in the objective pursued by the drafting of this standard.