Longmont Commercial Rooftop HVAC Systems Service Experts Heating & Air Conditioning in Longmont has a variety of commercial rooftop HVAC products and services. For instance, Lennox® packaged rooftop commercial HVAC systems are among the most innovative products on the market 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 deliver outstanding comfort and indoor air quality (IAQ) in your commercial spaces. In addition, three of our four rooftop systems – Energence, Strategos® and Landmark® - are ENERGY STAR® certified, which will help lower your energy expenses, meaning you’ll have a lower total cost of ownership. Call 303-647-5749 to learn more.