Search Search Search Ruud Series Ruud Series Achiever Plus® Series (14)Achiever Series (5)Achiever™ Series (7)L Series (1)RUTG Series (4)RUTGH Series (2)S Series (1)SR Series (1)Ultra® Series (9) Type of Water Heater Type of Water Heater Tank (40)Tankless (15) Fuel Type Fuel Type Electric (10)Gas (40)Hybrid Electric (5) ENERGY STAR® ENERGY STAR® Yes (12)No (19) Mid-Efficiency 70 Direct Vent Indoor Mid-Efficiency 95 Direct Vent Indoor SR Series Super High Efficiency Condensing Tankless Gas Water Heater with Recirculation Pump Mid-Efficiency 84 Direct Vent Indoor Mid-Efficiency 84 Outdoor Mid-Efficiency 70 Outdoor Mid-Efficiency 95 Outdoor Gas High Efficiency Non-Condensing Indoor Tankless Gas Water Heater W/Built-In Wi-Fi High Efficiency Non-Condensing Indoor Tankless High Efficiency Non-Condensing Outdoor Tankless w/Wi-Fi High Efficiency Non-Condensing Outdoor Tankless Super High Efficiency Condensing Tankless Super High Efficiency Condensing Tankless with Built-In Wi-Fi Super High Efficiency Condensing Tankless Super High Efficiency Condensing Tankless