Noritz® - Condensing Tankless Water Heater, 199 Kbtu/hr, Natural Gas, Outdoor, Ultra Low NOx, 0.91 EF

Bosch - Greentherm T9800 SEO 199 - 11.2 GPM Residential Natural Gas or Liquid Propane Outdoor Gas Tankless Water Heater

Noritz® - Condensing Tankless Water Heater, 180 Kbtu/hr, Natural Gas, Outdoor, Ultra Low NOx, 0.92 EF

Rheem - Performance Plus 9.5 GPM Smart Non-Condensing Outdoor Natural Gas Tankless Water Heater

Rinnai® - Tankless Water Heater, 140 Kbtu/hr, Natural Gas, Outdoor, Ultra Low NOx, 0.81 EF

Rinnai® - Tankless Water Heater, 160 Kbtu/hr, Propane, Outdoor, Ultra Low NOx, 0.81 EF