A tankless water heater heats water as it flows through instead of keeping a tank hot, so it uses less energy in many homes and doesn't run out during a long shower. It isn't the right fit for every house, mostly because of flow limits and installation needs. Call the number on this page to be connected with a local plumber in Greensboro who can size and install one or service the unit you have.
How a tankless heater works
When you open a hot tap, water flows through the unit and a gas burner or electric element heats it on the spot. When the tap closes, the heater shuts off. There's no tank sitting at temperature all day, which is where the energy savings come from.
What the numbers say
The U.S. Department of Energy reports that tankless heaters can be 24% to 34% more energy efficient than storage tanks in homes that use 41 gallons of hot water a day or less, and 8% to 14% more efficient in homes that use a lot of hot water. It also says most tankless units are expected to last more than 20 years, compared with about 10 to 15 for a tank.
The tradeoff is flow. DOE puts typical output at 2 to 5 gallons per minute, and gas units deliver more than electric ones. Two showers and a dishwasher at once can be more than a single unit can handle, so sizing matters.
Is tankless a good fit for your Greensboro home?
| Usually a good fit | Think it through first |
|---|---|
| Natural gas already at the house | All-electric home with a smaller electrical panel |
| One or two people, or staggered showers | Large household with overlapping hot water use |
| Replacing a tank that's already failed | A tank that still has years left in it |
| Short on space in a closet or garage | No good route for venting a gas unit |
What changes during installation
Swapping a tank for a tankless unit is more involved than a like-for-like replacement. A gas tankless heater often needs a larger gas supply line and its own venting. An electric model can need a much bigger circuit, sometimes a panel upgrade. Piedmont Natural Gas supplies gas in Greensboro, and if you smell gas at any point, leave the house and call 911 or Piedmont from outside. The City of Greensboro's plumbing permit fee schedule covers water heaters of all kinds, so a tankless install is permitted and inspected like any other.
Maintenance on Greensboro water
Tankless units have narrow heat exchangers, and mineral scale is their main enemy. Greensboro's water is moderately soft, averaging 43 to 46 mg/L hardness per the City's report, which works in your favor. Manufacturers still call for periodic flushing, so ask the plumber how often your model needs it.
What affects the cost
The unit's size and fuel type, gas line and venting work, electrical upgrades for electric models, and where the unit is mounted all move the price. Ask for a quote that separates the heater from the installation work.
Tankless Water Heater questions from Greensboro homeowners
Will a tankless water heater run out of hot water?
How much more efficient is tankless?
Is gas or electric tankless better?
Does a tankless water heater need maintenance?
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