Federal program helps American families pay their energy bills (NEXSTAR) — A new rule from the Biden administration could limit the type of water heaters available to consumers in the coming years, ...

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.

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

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 ...