Technical Articles

FAQ - What is a condensing heater?

A condensing heater passes hot flue gases through a secondary, stainless steel heat exchanger to preheat the inlet water temperature. The exhaust gas is cooled and steam in the exhaust gas condenses on the vent surface.A condensing tankless heater is more efficient because of this pre-heating process. Our condensing heater is 93% efficient as compared to 80% efficiency for most non-condensing tankless heaters. This saves you about 10-15% more on your water heating bill.

Applicable Models
  • Models: NCC199-DV-LP, NCC199-DV-NG, NCC199-SV-LP, NCC199-SV-NG, NRC111-DV-LP, NRC111-DV-NG, NRC111-SV-LP, NRC111-SV-NG, NRC98-DV-LP, NRC98-DV-NG
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