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Rinnai RE140iN Non-Condensing Natural Gas Tankless Water Heater, Up to 5.3 GPM, Indoor Installation, 140,000 BTU - Amazon.com
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Rinnai REP160eN Smart-Circ Non-Condensing Natural Gas Tankless Water Heater with Built-In Recirculation Pump, Up to 6.1 GPM, Outdoor Installation, 160,000 BTU - - Amazon.com
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Rinnai RUR199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation - Amazon.com
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