Grand Island Commercial Rooftop HVAC Systems McElroy Service Experts Heating & Air Conditioning in Grand Island gives you choice in commercial rooftop HVAC products and services. For instance, 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. By combining industry-leading technology and efficiency with our expert services, you will receive dependable, sustainable systems created to deliver outstanding comfort and indoor air quality (IAQ) in your commercial offices. Additionally, three of our four systems – Energence, Strategos® and Landmark® - are certified by ENERGY STAR®, which will help lower your energy expenses, leading to a lower total cost of ownership. Call 308-210-4398 to learn more.