Ruud Water Heaters Search Search Search Type of Water Heater Type of Water Heater Tank (32)Tankless (13) Ruud Series Ruud Series Achiever Plus® Series (12)Achiever Series (6)Achiever™ Series (3)SR Series (1)Ultra® Series (14) ENERGY STAR® ENERGY STAR® Yes (17)No (20) High Efficiency Condensing Power Direct Vent Atmospheric 9.5 GPM Outdoor Tankless Atmospheric LeakGuard™ Gen 5 8.4 GPM Indoor 9.0 GPM Outdoor Heavy Duty Ultra Low NOx 9.0 GPM Indoor Leakguard LeakGuard™ and Demand Response 8.4 GPM Outdoor Induced Draft Power Direct Vent Leaksense and Demand Response Heavy Duty Power Vent Ultra Low NOx Power Vent 9.5 GPM Indoor Heavy Duty Heavy Duty Ultra Low NOx Powered Damper Power Vent LeakSense Mid-Efficiency 70 Outdoor Mid-Efficiency 70 Direct Vent Indoor Table Top standard Power Direct Vent Mid-Efficiency 84 Direct Vent Indoor Power Direct Vent ProTerra® Plug-in Heat Pump with HydroBoost and LeakGuard Plug-in Heat Pump (Dedicated Circuit) Point-of-Use Pacemaker (Standard and Ultra Low NOx) Plug-in Heat Pump with HydroBoost Powered Damper Ultra Low NOx Mid-Efficiency 95 Direct Vent Indoor Powered Damper SR Series Super High Efficiency Condensing Tankless Gas Water Heater with Recirculation Pump Mid-Efficiency 84 Outdoor Ultra Low NOx Power Vent Ultra Low NOx Ultra Low NOx Mid-Efficiency 95 Outdoor Gas