Rinnai RX199iN Condensing Smart Sense Tankless Water Heater Rinnai RX130iN Condensing Smart Sense Tankless Water Heater ...

Tankless gas water heaters heat water using either a condensing or non-condensing method. The former usually has two heat exchangers while the latter has one, manufacturer Navien explains.

Its tankless, non-condensing natural gas water heater sells for about $1,000 at Home Depot, compared to $1,800 for a condensing 75-gallon tank. The new rules were published by the Department of ...

Compliance with the new standards is required by December 26, 2029. Tankless gas water heaters heat water using either a condensing or non-condensing method. The former usually has two heat exchangers ...