In the 1930s and the 1940s, Kirby decided to offer their products in retail environments, and introduced the "R" series. They are essentially identical to their "C" series, with the only difference being the power switch installed on the handle. The first model was the R, followed by the 2R, 3R and 4R. In 1970, input from Kirby distributors, dealers, management and customers guided Kirby engineers in developing the Kirby Classic. This ushered in the second generation models, and was an instant success, with soaring sales, allowing the company to expand its manufacturing facilities outside of Cleveland for the first time, which coincided with the rising popularity of wall-to-wall custom installed carpet. In 1972, Kirby West began operations in Andrews, Texas at 1345 NW 101 Street (also known as North Seminole Highway), which doubled the company's manufacturing capacity. The company did maintain a presence in Canada at 1009 Burns Street East in Whitby which is no longer staffed.