About Warren Warren is a famous windows and doors brand in China. As one of the top 10 manufacturers in China, Warren is trusted by Chinese consumers. Warren is head-quartered in Beijing, takes technique and workmanship and quality seriously. Instead of applying traditional manpower in our factories, we have introduced a few German Elumatec Automatic Processing machines to make the manufacturing more precise and effective. In the past ten years, Warren keeps pushing itself to pursue more delicate products for every customer by observing the newest technique and designs while always remaining professional service. You can see many stores selling Warren products in many cities across China and we also done many excellent projects for customers from another countries. Our products have received many favors from over 350,000 families. But we are not yet satisfied with those progress. We was working on, are working on, and will continue working on improved quality and better budget for our customers.