Commenters were quick to tell the poster to shut the gas-powered water heater down immediately. "Shut that thing down ...

A gas water heater is a combustion appliance that burns gas-it must vent the exhaust fumes to the outdoors through a flue (a round chimney pipe). So first look for a flue. A flue indicates that ...

“To change to a condensing water heater, you will need to completely change the flue gas vent system, which will lead to increased labor and material costs,” he said. “In many ...