EX-21 4 0004.txt SUBSIDIARIES SUBSIDIARIES The following lists all significant subsidiaries and affiliates of A. O. Smith Corporation. Certain direct and indirect subsidiaries of A. O. Smith Corporation have been omitted because, considered in the aggregate as a single subsidiary, such subsidiaries would not constitute a significant subsidiary. Jurisdiction in Which --------------------- Name of Subsidiary Incorporated ------------------ ------------ AOS Holding Company Delaware A. O. Smith International Corporation Delaware A. O. Smith Export, Ltd. Barbados A. O. Smith Electrical Products Canada Limited Canada A. O. Smith Enterprises Ltd. Canada A. O. Smith (China) Water Heater Co., Ltd. China A. O. Smith L'eau Chaude S.a.r.l. France A. O. Smith Warmwasser-Systemtechnik GmbH Germany A. O. Smith Electrical Products Limited Liability Company Hungary A. O. Smith Electric Motors (Ireland) Ltd. Ireland A. O. Smith Holding (Ireland) Ltd. Ireland IG-Mex, S.A. de C.V. Mexico Motores Electricos de Juarez, S.A. de C.V. Mexico Motores Electricos de Monterrey, S.A. de C.V. Mexico Productos de Agua, S.A. de C.V. Mexico Productos Electricos Aplicados, S.A. de C.V. Mexico A. O. Smith Electrical Products B.V. The Netherlands A. O. Smith Water Products Company B.V. The Netherlands A. O. Smith Electrical Products (S.E.A) Pte Ltd Singapore A. O. Smith Electrical Products Limited United Kingdom