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) Ultra Low Nox High Btu with Side Connections Super High Efficiency Heavy Duty with LeakSense Super High Efficiency Ultra Low Nox Skinny Super High Efficiency with LeakSense Heavy Duty Power Direct Vent Direct Vent Marathon Water Heater LeakGuard Water Heater Marathon Point-of-Use Water Heater Electric Lowboy Water Heater With Side Connections Super High Efficiency Condensing Tankless Super High Efficiency Condensing Tankless Super High Efficiency Condensing Tankless with Built-In Wi-Fi Super High Efficiency Condensing Tankless High Efficiency Non-Condensing Outdoor Tankless High Efficiency Non-Condensing Outdoor Tankless w/Wi-Fi High Efficiency Non-Condensing Indoor Tankless High Efficiency Non-Condensing Indoor Tankless Gas Water Heater W/Built-In Wi-Fi Ultra Low NOx Mid-Efficiency 95 Outdoor Gas Ultra Low NOx Power Vent Ultra Low NOx Power Direct Vent Power Vent Mid-Efficiency 84 Outdoor Point-of-Use ProTerra® Plug-in Heat Pump with HydroBoost and LeakGuard Mid-Efficiency 70 Outdoor Powered Damper Pacemaker (Standard and Ultra Low NOx) Mid-Efficiency 70 Direct Vent Indoor Powered Damper Ultra Low NOx LeakSense Plug-in Heat Pump (Dedicated Circuit) standard Plug-in Heat Pump with HydroBoost Table Top Power Direct Vent Mid-Efficiency 95 Direct Vent Indoor SR Series Super High Efficiency Condensing Tankless Gas Water Heater with Recirculation Pump Powered Damper Mid-Efficiency 84 Direct Vent Indoor LeakGuard™ Heavy Duty Ultra Low NOx Heavy Duty Ultra Low NOx Heavy Duty Power Vent Power Direct Vent Heavy Duty Atmospheric Atmospheric Leaksense and Demand Response Induced Draft LeakGuard™ and Demand Response Gen 5