The principal activities of the group are manufacturing dehumidifiers, refrigeration systems, indoor air quality ventilation, air conditioning systems and air purification systems. the company operates through its subsidiaries namely dectron, refplus, thermoplus, klaasco, circul-aire and ipac. the company's products include mechanical dehumidifiers and energy recovery systems through dectron. it also produces refrigeration and air conditioning systems through refplus and thermoplus. circul-aire is one of the pioneers of the air treatment industry and is a worldwide leader in the advanced technologies of gas-phase filtration and energy recovery. klaasco is a in-house manufacturer of a wide range of metal products. during fiscal 2000, dectron acquired ipac which specializes in the business of precision cooling products, air conditioning productsand compressed air products.