Ducts of metal for ventilating and air-conditioning installations; Metal roof vents for heating, cooling, and ventilation in residential and commercial buildings in residential and commercial buildings; Ventilation windows of metal
Metal GoodsAir-conditioning, air cooling and ventilation apparatus and instruments; Ventilating fans for commercial and industrial use; Ventilating exhaust fans
Environmental Control ApparatusConsultancy and information services in the field of construction; Installation and repair of heating, ventilating and air conditioning equipment
Building Construction and Repair