Hardy installed the HVAC system in the Social Security building in downtown Birmingham. This building spans 10 floors and includes 1,960 tons of cooling, 37 AHUs, 2 energy recovery units, 6 split systems, 2 chillers, 1 cooling tower, 9 pumps, 1 heat exchanger, 39 exhaust fans, 11 louvers, and 317,000 pounds of sheet metal duct. This project was unique – it includes an under-floor HVAC system that delivers conditioned air to occupants through a pressurized sub-floor plenum.