Oil & gas industry usually adopts the modular construction method, and follows international design standards, such as North America, Europe, Russia and other national standards, which have special requirements for drawings, documents, system design and product manufacture. Based on the in-depth understanding of international norms and years of HVAC system design experience, Leadair can design schemes and customize products according to the needs of customers, and provide products including AHU, PAC, fans, damper, ventilation ducts and so on, which fully meet the design specification and product quality standards.