More than14,000 apprentices are registered at 148 training facilities across the United States and Canada. The ITI is jointly sponsored by SMART, the International Association of Sheet Metal, Air, Rail and Transportation workers, and the Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA).

ITI supports apprenticeship and advanced career training for union workers in the sheet metal heating, ventilation, and air conditioning (HVAC), welding and industrial, architectural and ornamental, and service and testing, adjusting and balancing industry throughout the United States and Canada. The ITI develops and produces a standardized sheet metal curriculum supported by a wide variety of training materials free of charge to sheet metal apprentices and journey workers.