Our firm since its inception, normally regards item top quality as company life, constantly make improvements to generation technology, improve product excellent and repeatedly strengthen organization total good quality management, in strict accordance with the national standard ISO 9001:2000 for indoor air purification, heat recovery core of AHU , Classroom Ventilation , AHU core ,villa fresh air ventilation sytem . Items won certifications with the regional and international primary authorities. For far more detailed information, please contact us! The product will supply to all over the world, such as Europe, America, Australia,Bulgaria , Suriname ,Doha , Canada .After years' creating and developing, with the advantages of trained qualified talents and rich marketing experience, outstanding achievements were gradually made. We get good reputation from the customers due to our good solutions quality and fine after-sale service. We sincerely wish to create a more prosperous and flourishing future together with all the friends home and abroad!