Guangzhou United A/C & R Co., Ltd. is a large and professional manufacturer specializing in R&D and production of shell and tube heat exchangers, with 30 years of experience and headquartered in Guangzhou, China. UAR has obtained ISO9001, ISO14000, CE, and ASME certifications, with 100 products patent Intellectual Property, which has earned the recognition and support of the majority of users and maintained a good brand reputation and technological leadership in the heat exchanger industry.