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. Diamond Contractors are extensively trained by Mitsubishi Electric to correctly size and install every ductless system. When you go with a Diamond Contractor, you’ll always get amazing products, first-class customer service, state-of-the-art products, and a superior skill set.