The Noritz Tankless Advantage - Interior Models

When it comes to quality, Noritz takes no short cuts in producing the highest quality tankless water heaters. Unlike other manufacturers, we do not outsource the main components of our heaters. We manufacture nearly 100% of the parts that go into our heaters. We even make the heat exchanger's copper tubing from raw copper. This allows Noritz to have the highest quality control of all the heater's parts and components.

  • Endless hot water and up to 40% energy savings
  • Flexible installation options and significant space savings
  • Manufactured for high efficiency (83-93%)
  • Clean, fresh hot water delivered at a consistent, safe temperature
  • Green advantages, including lower greenhouse gas emissions
  • Reduced risk of flooding, compared to traditional tank water heaters
  • Life span of 20 years or more
  • Natural Gas or Propane
  • Whole house or commercial water heating solution
  • Direct electronic ignition - no pilot light
  • On-Board diagnostics and safety monitoring
  • Noritz logo

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Model IDModel NameTypeInput Range
MBtuH
Flow Rate
Range
Energy
Star
Energy
Factor
Temperature
Range
ControlHxWxDWeight
158NR111DVTwo Pipe11.0 - 250.00.5 - 11.1Noc100 - 180Optional24.2x18.3x9.462
161NR111SVSingle Pipe11.0 - 250.00.5 - 11.1No0.82100 - 180Optional24.2x18.3x9.462
163N-0751MSingle Pipe12.0 - 199.90.5 - 9.8Yes0.83100 - 180Optional23.6x13.8x9.447
164N-0751M-DVTwo Pipe12.0 - 199.90.5 - 9.8Yes0.83100 - 180Optional23.6x13.8x9.447
166N-0631SSingle Pipe25.0 - 180.00.5 - 7.1Yes0.83100 - 160Optional23.6x13.8x6.741
168N-1321M ASMESingle Pipe ASME22.5 - 380.00.7 - 13.2Noc100 - 180Optional29.5x18.9x11.8105
2185N-0531SSingle Pipe20.0 - 140.00.5 - 6.6Yes0.82100 - 160Optional20.5x13.8x6.736
2187N-0751M-DVCConcentric12.0 - 199.90.5 - 9.8Yes0.82100 - 180Onboard23.6x13.8x9.447
2188N-0931M-ASMESingle Pipe ASME11.0 - 250.00.5 - 11.1Nov100 - 180Optional24.2x18.3x9.462
  • Heat Exchanger: 12 Years Residential, 5 Years Commercial
  • All Other Parts: 5 Years
  • Reasonable Labor: 1 Year