Are there differences between the CU199 and other Rinnai condensing products?

Yes, there are some differences for the CU199 which includes:

  • Built in cascade controller to link up to 24 units
  • A Thermal Efficiency rating (96% thermal efficiency)
  • Commercial Energy Star designation
  • New common venting configurations (room air and sidewall intake with vertical exhaust)
  • Temperature settings from 98°F to 185°F, right out of the box
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