Rheem Pro Partner - Serving Colorado and Wyoming The Rheem Pro Partner Contractors is a group of elite independently owned heating and cooling contractors that was formed in Denver in 1992. The goal of this group was to become the most thoroughly trained professionals in the industry and raise the bar for HVAC service and installation. While the advertising message was home comfort, quality workmanship, and customer satisfaction, Comfort Air Distributing, the Colorado/Wyoming Rheem Distributor, began working with contractors on service and installation training and certifications.