Multistack International Ltd engages in the marketing and distribution of industrial air conditioning equipment through its wholly-owned subsidiary, DunnAir International Ltd. The company has two segments namely heating, ventilation and air conditioning and investment operations. It generates maximum revenue from the heating, ventilation and air conditioning segment. The company distributes its products in New Zealand, Philippines, South Korea, and the middle east region. Its products include Water-Cooled, Air-Cooled, MagLev Water-Cooled, MagLev Air-Cooled, Heat Pump/Dedicated Heat Recovery Chillers, Centrifugal Modules, and Air-Cooled Split.