JOHNSON CITY, Tenn. – (Sept. 22, 2026) – A. O. Smith, North America's largest water heater manufacturer, today proudly announced that its Signature 900 Smart Hybrid Heat Pump Water Heater with Hot Water Plus has earned the Good Housekeeping Seal from the Good Housekeeping Institute. A coveted symbol of quality and consumer confidence for more than a century, the Good Housekeeping Seal is among the most recognized and trusted consumer icons in the world today