When you work with a Mitsubishi Electric Diamond Contractor, you can count on the highest levels of professionalism in the HVAC industry and unsurpassed technical expertise. As a Diamond Contractor, we receive extensive training and ongoing instruction at a Mitsubishi Electric- approved training center. Education takes place at every level of service from new product sales to follow-up customer care. As part of the program, we’re also able to offer longer warranty periods on equipment without any additional cost to you.