Shandong GRAD Group Co., Ltd founded in 1993, located in dezhou city of shandong province, and covering an area of 450, 000 square meters. As whole solution provider of central air conditioning system, it is a large modern enterprise group with central air-conditioning and compound material products research development, design, production, sales, installation and maintenance. Shandong GRAD group is the pillar industry in China Central Air-conditioning city(DEZHOU) named by China Refrigeration and Air-conditioning Industry Association. GRAD Group is one of top enterprises for Chinese central air conditioning unit system and compound material industry.

GRAD group has gained national electromechanical equipment installation qualification level 1, purification air-conditioners installation qualification level 2 and People's Republic of China Qualification Certificate for Foreign Contracted Projects. And it has passed ISO9001, ISO14001, OHSAS18001, CE and other certificates. There are many sales and service offices in more than 30 cities of China. GRAD products are exported to more than 40 countries such as Indonesia, Russia, Australia, Canada, Sudan. At home and aboard, GRAD Group has produced a large number of central air conditioning and composite material excellent projects.