Toronto Commercial Rooftop HVAC Systems Service Experts Heating & Air Conditioning in Toronto gives you choice in commercial rooftop HVAC products and services. 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. Bringing industry-leading technology and efficiency with expert installation and service means you receive dependable, sustainable systems built to bring outstanding comfort and indoor air quality (IAQ) in your commercial buildings. In addition, three of our four systems – Energence, Strategos® and Landmark® - are ENERGY STAR® certified, which will help lower your energy expenses, leading to a lower total cost of ownership. Call 905-453-6700 to learn more.