High Efficiency Condensing Tankless Water heaters

Rinnai's newest tankless addition incorporates condensing technology to create the most efficient, most durable tankless water heater design on the market today. Available in two models, suitable for mid-to large-sized homes, Rinnai's new Condensing Tankless Water Heaters offer all the same benefits builders and homeowners have come to expect from Rinnai.

Rinnai's unique condensing design incorporates two innovative heat exchangers. The stainless steel system recaptures residual heat from flue gases to pre-heat incoming ground water, which then circulates to the primary copper heat exchanger.

  • Up to 95% thermal efficiency
  • More sanitary hot water supply
  • Flexible installation options and significant space savings
  • Commercial-grade heat exchanger
  • 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
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Model IDModel NameTypeInput Range
MBH
Flow Rate
Range GPM
Energy
Star
Energy
Factor
Temp.
Range
Control
Type
HxWxDWeight
2684RC98HPiInterior10.0 - 199.00.4 - 9.8Yes.9398 - 140
98 - 185 with
MCC-91
Onboard
MC-91
26x19x1071
2685RC98HPeExterior10.0 - 199.00.4 - 9.8Yes.9398 - 140
98 - 185 with
MCC-91
MC-9126x19x1071
28527RC80HPiInterior10.0 - 157.00.4 - 8.0Yes.9398 - 140
98 - 185 with
MCC-91
Onboard
MC-91
26x19x1071
28528RC80HPeExterior10.0 - 157.00.4 - 8.0Yes.9398 - 140
98 - 185 with
MCC-91
MC-9126x19x1071
  • Heat Exchanger: 12 Years Residential, 5 Years Commercial
  • All Other Parts: 5 Years
  • Reasonable Labor: 5 Years Residential, 2 Years Commercial

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