ROC is the largest wall-hung gas boiler manufacturer in China. Integrating scientific research, manufacturing, sales and service, ROC are the first Chinese manufactures to have a fully automated wall-hung gas boiler production line with an annual capacity of 500,000 units. 18 years of hard work has developed ROC into a benchmark enterprise in the gas boiler industry.
ROC has always viewed technology as its key to success. An advanced technology research center and an elite team were established from the start of the company. Adopting European top domestic boiler technology and tireless innovation in the industry, ROC has acquired over 20 technology patents. In particular, its high-efficiency condensing heat exchanger technology which has obtained national invention patent, and is in application process for an international patent.  
This core technology enables ROC to have independently developed the premix condensing gas boiler with a thermal efficiency of up to 109%, which measures up to the highest international standards.
Priding on advanced technology, ROC has successively launched over 80 types of products categorized into 15 series. ROC products have obvious advantage on high energy efficiency boilers, and are very popular all over the world.