HIJ Industries Private Limited At HIJ, we believe that clean and optimised air supply is the key to healthy living and productive working environment. We are passionate about what we do and we work tirelessly to ensure complete customer satisfaction by manufacturing and installaing specifically designed products to meet our customer’s precise requirement and providing excellent after sales service. HIJ Industries has own and outsourced team of expertise for Duct installation. Cut length drawing is all we plan, organize, schedule installation of HVAC air distribution system and air conditioning distribution system. We are keen to collaborate with Duct installation team all around India for further endeavors.