HOT ! Noritz NRC661-OD-NG 120,000 BTU Outdoor Condensing Tankless Water Heater (Natural Gas)

Noritz NRC661-OD-NG 120,000 BTU Outdoor Condensing Tankless Water Heater (Natural Gas)

The Noritz NRC661-OD-NG is a high-efficiency outdoor condensing tankless water heater designed for reliable residential hot water delivery without occupying indoor space. With a 120,000 BTU input and advanced condensing technology, this unit delivers continuous hot water while maximizing energy efficiency.

Key Features

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  120,000 BTU input ideal for small to mid-sized homes and moderate hot water demand.


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  Outdoor condensing design eliminates the need for indoor venting.


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  Up to ~6.6 GPM flow rate depending on temperature rise.


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  High efficiency operation with condensing technology to reduce fuel usage.


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  Lower exhaust temperatures compared to non-condensing outdoor units.


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  Built-in freeze protection for outdoor installations when powered.


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  Electronic ignition — no standing pilot light.


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  Compact wall-mounted design for exterior wall installations.

Ideal Applications

• Single-family homes with 1–2 bathrooms


• Apartments, condos, and ADUs


• Homes where outdoor installation is preferred


• Projects looking to avoid indoor venting

Technical Specifications

• 
  Model: Noritz NRC661-OD-NG


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  Fuel Type: Natural Gas


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  BTU Input Range: 18,000 – 120,000 BTU/hr


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  Maximum Flow Rate: Up to ~6.6 GPM


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  Installation: Outdoor only


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  Efficiency / UEF: ~0.93 (condensing)


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  Condensate Drain: Required


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  Water Connections: 3/4\"


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  Gas Connection: 3/4\"


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  Electrical: 120V AC


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  Approximate Weight: ~60 lbs


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  Warranty: 12-year heat exchanger, 5-year parts, 1-year labor (residential)

Why Buy From United Plumbing & Fire Supply?

• Competitive pricing on Noritz tankless systems


• Fast shipping and secure handling


• Local pickup and job-site delivery options


• Experienced support for residential and contractor needs

Always verify outdoor clearances, freeze protection requirements, condensate drainage, and local code compliance with a licensed installer.