9.38 GPM Condensing Residential Natural Gas Tankless Water Heater

Endless Hot Water. Lower Energy Bills. Smarter Comfort.

The ThermoMate RTC68iN Condensing Tankless Water Heater delivers powerful whole-house performance with industry-leading 0.91 UEF efficiency. Designed for North American homes, this high-output 163,000 BTU natural gas unit provides continuous, on-demand hot water while reducing annual energy costs.

High Efficiency 0.91 UEF – Save More Every Year

With advanced dual heat exchanger technology , this condensing system captures and reuses exhaust heat that traditional tank heaters waste.

• Stainless steel condensing heat exchanger

• Oxygen-free copper primary heat exchanger

• Up to 17% energy savings vs. standard models

• Lower gas consumption and reduced carbon footprint

More efficiency. More savings. Greener home.

True Whole-House Performance – Up to 9.38 GPM

Built for busy households.

• Supports up to 3 simultaneous showers

• 2 GPM per shower at 105°F (62°F inlet temp)

• Up to 9.38 GPM in warmer climates (77°F+ inlet temp)

• Runs showers, washing machines, and kitchen fixtures at the same time

No storage tank. No waiting. No cold water interruptions.

Stable Temperature – No Fluctuations

Featuring an intelligent water mixing valve system , RTC68iN:

• Maintains consistent outlet temperature

• Eliminates hot-cold fluctuations

• Automatically adjusts flow during multi-fixture use