Tankless Water Heater in Raleigh, NC

The tradeoffs in plain numbers

According to the U.S. Department of Energy, tankless units are 8% to 34% more efficient than storage heaters, with the bigger savings in homes that use less hot water. They last about 20 years, against 10 to 15 for a tank. The limit is output: roughly 2 to 5 gallons of hot water per minute. A shower, the dishwasher and the washing machine running together can exceed what one unit delivers, and the water simply comes out cooler.

Gas or electric?

Gas models generally produce more hot water per minute and suit larger households, but they need a properly sized gas line and dedicated venting. In the Raleigh area, gas comes from Enbridge Gas North Carolina, the company formerly known as PSNC, and service isn't on every street. Electric models skip the venting but draw a lot of current, so many homes need new circuits and sometimes a larger electrical panel. If you ever smell gas, leave the house and call 911 or the gas utility from outside.

Who tends to benefit

• Homes that already have natural gas and a good place to vent
• Smaller households, or families who don't all shower at once
• Owners replacing a failed tank anyway, rather than pulling out a working one
• Houses where the tank takes up closet or garage space you'd like back

It may not pay off for a big household with overlapping hot water use on an electric service that would need a costly upgrade.

Upkeep on Raleigh water

Narrow heat exchangers are sensitive to mineral buildup. Raleigh's water is soft, at about 25 ppm total hardness in the City's 2025 report, which works in a tankless owner's favor. Most manufacturers still call for periodic descaling and an inlet filter cleaning, so ask the plumber what your model needs.

Permits

A tankless conversion often involves gas, venting or electrical changes. Raleigh handles trade permits through its online Permit and Development Portal; ask the plumber which permits apply to your install.

What affects the cost

The unit's capacity and fuel, gas line upsizing, new venting, electrical work, mounting location and removing the old tank. A quote that separates equipment from labor makes comparisons easier.