Champaign Commercial Rooftop HVAC Systems Chief / Bauer Service Experts Heating & Air Conditioning in Champaign lets you choose from multiple commercial rooftop HVAC products and services. Lennox® packaged rooftop commercial HVAC systems are top the list of 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 designed to provide outstanding comfort and indoor air quality (IAQ) in your commercial offices. Additionally, three of our four units – Energence, Strategos® and Landmark® - are certified by ENERGY STAR®, which will help decrease your energy expenses, translating to a lower total cost of ownership. Call 217-689-2469 to learn more.