23.84.00 Humidity Control Equipment
23.84.13.33 Portable Humidifiers
23.84.13 Humidifiers 23.84.13.13 Heated-Pan Humidifiers 23.84.13.16 Wetted-Element Humidifiers 23.84.13.19 Atomizing Humidifiers 23.84.13.23 Direct-Steam-Injection Humidifiers 23.84.13.26 Jacketed, Steam Humidifiers 23.84.13.29 Self-Contained Steam Humidifiers 23.84.13.33 Portable Humidifiers 23.84.16 Mechanical Dehumidification Units 23.84.16.13 Outdoor, Mechanical Dehumidification Units 23.84.16.16 Indoor, Mechanical Dehumidification Units 23.84.16.33 Portable Dehumidifiers 23.84.19 Desiccant Dehumidification Units