Rochester Commercial Rooftop HVAC Systems Strogen's Service Experts Heating & Air Conditioning in Rochester lets you choose from multiple commercial rooftop HVAC products and services. For instance, Lennox® packaged rooftop commercial HVAC systems are are some of the most innovative products being sold 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 dependable, sustainable systems created to bring superior comfort and indoor air quality (IAQ) in your commercial buildings. Additionally, three of our four systems – Energence, Strategos® and Landmark® - are ENERGY STAR® certified, which will help reduce your energy expenses, translating to a lower total cost of ownership. Call 603-923-4570 to learn more.