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

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$1,117

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Detailed information on 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




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


  • Outdoor condensing design eliminates the need for indoor venting.


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


  • High efficiency operation with condensing technology to reduce fuel usage.


  • Lower exhaust temperatures compared to non-condensing outdoor units.


  • Built-in freeze protection for outdoor installations when powered.


  • Electronic ignition — no standing pilot light.


  • 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


  • Fuel Type: Natural Gas


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


  • Maximum Flow Rate: Up to ~6.6 GPM


  • Installation: Outdoor only


  • Efficiency / UEF: ~0.93 (condensing)


  • Condensate Drain: Required


  • Water Connections: 3/4\"


  • Gas Connection: 3/4\"


  • Electrical: 120V AC


  • Approximate Weight: ~60 lbs


  • 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.


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