For example, a Rinnai America tankless non-condensing natural gas water heater goes for roughly $1,000 at Home Depot, while a comparable condensing tank goes for about $1,800.

Water heating is the second-largest energy cost for U.S. households. But you can save with a more efficient water heater, Consumer Reports explains.

Ballpark water heater costs from Home Depot's web site: 80 gallon Rheem heat pump: $2700 UEF 4.07 for the 240V models, but only 3.5 on the 120V models?

Rinnai America 's — which calls itself the leader in tankless technology — tankless non-condensing natural gas water heater goes for roughly $1,000 at Home Depot, while a comparable condensing ...

For example, a Rinnai America tankless non-condensing natural gas water heater goes for roughly $1,000 at Home Depot, while a comparable condensing tank goes for about $1,800.