 DALLAS, April 29, 2021 PRNewswire -- Lennox International NYSE: LII, a global leader in the heating, air conditioning, and refrigeration markets, officially revealed the Model L packaged rooftop line during the first-ever Lennox Commercial Product Showcase. The light commercial HVAC system features an all-new rooftop controller, the Lennox CORE Control System and Service App, which was a finalist in the 2021 AHR Expo Innovation Awards. 