NAICS 333411 — Industrial and Commercial Fan and Blower and Air Purification Equipment Manufacturing 
BEA sector: Air purification and ventilation equipment manufacturing
Activity: Air purification equipment, stationary, manufacturing
Activity: Air scrubbing systems manufacturing
Activity: Air washers (i.e., air scrubbers) manufacturing
Activity: Dust and fume collecting equipment manufacturing
Activity: Electrostatic precipitation equipment manufacturing
Activity: Filters, air-conditioner, manufacturing
Activity: Filters, furnace, manufacturing
Activity: Furnace filters manufacturing