Certifications at KDM Service Corporation Our team at KDM Service Corporation in Tuscaloosa aims to offer the best heating and cooling service around. The primary way we sustain our expertise and continue to expand our knowledge of HVAC products is by earning industry certifications. Find out more about the certifications our experts have received below. Dave Lennox Premier Dealer™ Dave Lennox Premier Dealers™ are specially trained and independently evaluated regularly to offer a higher level of customer service. As a Dave Lennox Premier Dealer™, our team in Tuscaloosa has partnered with Lennox®, a top name in home comfort, to provide some of the most innovative and energy efficient heating and cooling products in the industry. To keep “Premier” status, KDM Service Corporation participates in an independent Customer Review program that encourages our clients to honestly rate our performance so we can make sure our staff continuously is meeting or exceeding the highest standards for quality service. Better Business Bureau KDM Service Corporation is a member of the Better Business Bureau. That means we operate by ethical business behaviors and provide trustworthy information to our customers. We have a solid rating and are proud to be part of this organization.