Ventilation and air conditioning systems and equipment, namely, Liquid Desiccant Dehumidifiers and replacement parts therefor; Ventilation and air conditioning systems and equipment for commercial and industrial use, namely, Dedicated Outdoor Air Systems (DOAS) comprised of HVAC equipment and installations in the nature of HVAC units and replacement parts therefor; Ventilation and air conditioning systems and equipment for commercial and industrial use, namely, ventilation equipment and insta...