Mechanical Trade Contractors of Arizona (MTCAZ) is a non-profit trade association for heating, ventilating, air conditioning and refrigeration contractors in Arizona. We work to give our members the tools they need to succeed in the mechanical industry. We represent and serve firms who design, install, service and repair air conditioning, heating, refrigeration, air purification, ventilating systems, plumbing, piping, sheet metal and energy management systems of all sizes and complexities. In addition, membership includes manufacturers of equipment, wholesalers and distributors of equipment, vocational and technical schools, utilities and others with an interest in the mechanical industry.