Atrium, which claims it is the largest producer of residential vinyl and aluminum windows in North America, now operates over 80 production and distribution centers in 23 states and Mexico. It manufactures about 7 million windows and patio doors per year and has annual sales of nearly $800 million, according to company officials. Atrium continues to be one of the most active consolidators in the window and door industry. It focuses on the repair and remodeling markets in California, Arizona, Nevada and Hawaii through an extensive vinyl replacement windows dealer network.