Name of Subsidiary

Jurisdiction in Which

Incorporated

AOS Holding Company

Delaware

A. O. Smith International Corporation

Delaware

A. O. Smith Water Treatment (North America), Inc.

Delaware

Aquaboss LLC

Delaware

SICO Acquisition, LLC

Delaware

Takagi—A. O. Smith Tankless Water Heater Company LLC

Delaware

American Water Heater Company

Nevada

Hague Europe, LLC

Ohio

William R. Hague, Inc.

Ohio

Lochinvar, LLC

Tennessee

State Industries, LLC.

Tennessee

Aquasana, Inc.

Texas

A. O. Smith Holdings (Barbados) SRL

Barbados

A. O. Smith Enterprises Ltd.

Canada

A. O. Smith (China) Investment Co., Ltd.

China

A. O. Smith (China) Water Heater Co., Ltd.

China

A. O. Smith (China) Water Products Co., Ltd.

China

A. O. Smith (Nanjing) Water Treatment Products Co., Ltd.

China

A. O. Smith L’eau chaude S.a.r.l.

France

Waterboss Europe, SRL

France

A. O. Smith (Hong Kong) Limited

Hong Kong SAR

A. O. Smith India Water Products Private Limited

India

Products de Agua, S. de R.L. de C.V.

Mexico

A.O. Smith Holdings I B.V.

The Netherlands

A.O. Smith Holdings II B.V.

The Netherlands

A.O. Smith Holdings III B.V.

The Netherlands

A.O. Smith International Holdings B.V.

The Netherlands

A.O. Smith Products v.o.f.

The Netherlands

A.O. Smith Water Products Company B.V.

The Netherlands

AO Smith Su Teknolojileri Anonim Sirketi

Turkey

A. O. Smith Water FZE

United Arab Emirates

Lochinvar Limited

United Kingdom

A. O. Smith Vietnam Company Limited

Vietnam