Concord Commercial Rooftop HVAC Systems Freschi Service Experts in Concord has a variety of commercial rooftop HVAC products and services. For example, Lennox® packaged rooftop commercial HVAC systems are among the most innovative products you can find today, including the new solar powered SunSource® System for Energence® rooftop HVAC systems. Our industry-leading technology combined with our expert installation and services means you’ll receive long-lasting, sustainable systems built to provide superior comfort and indoor air quality (IAQ) in your commercial offices. Further, three of our four rooftop systems – Energence, Strategos® and Landmark® - are ENERGY STAR® certified, which will help reduce your energy expenses, meaning you’ll have a lower total cost of ownership. Call 925-384-1303 to learn more.