Egg Systems offers complete comfort in a single, easy to maintain system. Choose packaged rooftop units from Lennox, Trane, Carrier or York for complete comfort in a single, easy-to-maintain system. Designed for fast, easy installation, rooftop units are dependable systems that provide a high degree of comfort in commercial buildings for years to come. Energy-efficient ENERGY STAR qualified equipment - including many of the industries most efficient units - help control energy costs for low total cost of ownership. Egg Systems commercial controls offer comfort, productivity and energy with superior oversight.