73309093
May 7, 1981
Dec 14, 1982
Packaged Energy Recovery System Comprising Air-to-Air and Process Heat Exchangers, Blowers, Motors, Drives, Filters, Controls, Dampers, Indirect Evaporative Coolers, Heating and Cooling Coils, Water Wash for Heat Exchangers, Humidifiers and Smoke Detectors, Sold as a Unit
Environmental Control Apparatus