Tank vs. Tankless Water Heaters for Winston-Salem Homes
Short answer: a tank water heater is simpler and cheaper to install; a tankless unit saves space and does not run out of hot water within its flow rate, but often needs venting and gas line upgrades. Household size, fuel and space decide it.
How each type works
A tank water heater keeps a storage tank (commonly 40 or 50 gallons in a typical house) hot all the time, using gas or electric elements. When you use hot water, cold water refills the tank and is reheated. A tankless (on-demand) heater heats water only as it flows through, using a powerful gas burner or electric elements. A heat pump water heater is a tank that uses a heat pump to move heat from the surrounding air into the water, using less electricity than standard electric resistance.
Side by side
| Tank | Tankless | |
|---|---|---|
| Hot water supply | Limited by tank size and recovery rate | Continuous, limited by flow rate (gallons per minute) |
| Space | Needs floor space | Wall-mounted, compact |
| Installation | Usually simplest when replacing like with like | Gas units often need new venting and larger gas line; electric units need large electrical capacity |
| Maintenance | Flush sediment, check the anode rod | Periodic descaling and inlet filter cleaning |
| Standby loss | Some heat lost from the tank all the time | None |
What is different in Winston-Salem
Soft water
Winston-Salem/Forsyth County Utilities reports average hardness of about 17.5 parts per million (Winston-Salem/Forsyth County Utilities, 2025 Water Quality Report). That is very soft, so scale buildup, which is the main maintenance headache for tankless units in hard-water cities, is less of an issue on city water. Homes on private wells should test their water, because hardness and iron can be much higher.
Winter groundwater temperature
A tankless heater has to raise incoming water to your set temperature. Incoming water is colder in January than in July, so the same unit delivers fewer gallons per minute in winter. Sizing has to be based on winter conditions and on how many fixtures run at once, such as two showers plus a dishwasher.
Crawlspaces, closets and garages
Many older Winston-Salem homes have water heaters in tight closets, utility rooms or crawlspaces. Tankless units can free up that space, but gas units need a vent path to the outside and adequate gas supply. In a crawlspace, freeze protection and leak access matter for any heater.
Fuel
If your home has natural gas, a gas tankless unit is common. Electric tankless units for a whole house can require a large electrical service upgrade, so for all-electric homes, a heat pump tank is often the better efficiency upgrade, if there is enough space and air around it.
Who usually chooses which
- A tank often makes sense when the existing heater is a tank in a workable spot, the household does not run out of hot water, and the budget is tight.
- Tankless often makes sense for households that regularly run out, owners who want the floor space, or remodels where venting and gas upgrades are already happening.
- A heat pump tank often makes sense in all-electric homes with a basement, garage or large utility room.
Permits and safety
In North Carolina, replacing or converting a water heater generally requires a permit and inspection. Whatever you choose, it should have a properly piped temperature and pressure relief valve, correct venting for gas units, and a drain pan where a leak could damage the house. The U.S. Department of Energy suggests a 120°F setting for most homes.
Related services
- Water Heater Repair & Replacement: Repair or replacement for tank and tankless water heaters, gas or electric.
- Repiping: Whole-house or partial repiping for galvanized, polybutylene and failing copper supply lines.
- Leak Detection & Repair: Hidden and visible leaks: supply lines, drains, slab and crawlspace leaks, and high water bills.
Sources: Winston-Salem/Forsyth County Utilities, 2025 Water Quality Report.
Frequently asked questions
Is a tankless water heater worth it in Winston-Salem?
It can be for households that run out of hot water or want the space. Installation often costs more because gas units may need new venting and gas piping. Soft city water means less descaling than in hard-water areas.
Will a tankless heater work in winter?
Yes, if sized for winter. Colder incoming water in January means the same unit delivers fewer gallons per minute, so sizing must account for it.
What size tank water heater do I need?
Tanks are sized by the household's busiest hour of hot water use, not just headcount. Many typical homes use 40 to 50 gallons.
Do I need a permit to switch to tankless?
Generally yes. Replacing or converting a water heater in North Carolina usually requires a permit and inspection.
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