Knoxville Commercial Rooftop HVAC Systems R & M Climate Control Service Experts Heating & Air Conditioning in Knoxville gives you choice in commercial rooftop HVAC products and services. For example, Lennox® packaged rooftop commercial HVAC systems are are some of the most innovative products on the market today, including the new solar powered SunSource® System for Energence® rooftop HVAC systems. By combining industry-leading technology and efficiency with our expert services, you will receive long-lasting, sustainable systems designed to provide superior comfort and indoor air quality (IAQ) in your commercial offices. Additionally, three of our four units – Energence, Strategos® and Landmark® - are ENERGY STAR® qualified, which will help reduce your energy expenses, leading to a lower total cost of ownership. Call 865-229-6176 to learn more.