Water heaters
Tankless water heaters
Call NowA tankless water heater heats water on demand instead of storing it. It suits households that want endless hot water and lower standby losses, but it may need a larger gas line, new venting or electrical upgrades, and yearly descaling.
At a glance
Common sign
Error codes on the unit display
First step
Load calculation
Tankless units are sized by flow rate (gallons per minute) and temperature rise, not tank capacity. Undersize one and two showers at once turn lukewarm.
The plumber checks your gas meter and line size, venting route and electrical before quoting, because those are what make a tankless install simple or complicated.
Tankless Water Heaters at a glance
- What it is
- A tankless water heater heats water on demand instead of storing it.
- Service category
- Water heaters
Signs you need tankless water heater help
- Error codes on the unit display
- Water fluctuates between hot and cold
- Unit shuts off during use
- Hasn't been descaled in over a year
The visit
What a tankless water heaters visit involves
- 1
Load calculation
Peak simultaneous use and incoming water temperature.
- 2
Utility check
Gas line sizing, venting path, condensate drain, electrical.
- 3
Install or service
Installation to manufacturer specs and code, or diagnosis and descaling for existing units.
What affects the cost of tankless water heaters
- Gas line upsizing
- Venting route
- Indoor vs. outdoor unit
- Electrical work for electric models
- Condensate drain
Check tankless water heaters coverage near you
Use your location or ZIP code to see whether tankless water heaters is covered where you are, and the nearest service area.
Location is only used to find the service area nearest you. It stays on your device and isn't stored.
Water actively leaking, overflowing or backing up? That's a job for 24-hour emergency service, not a scheduled visit.
Tankless Water Heaters: common questions
Tank vs. tankless: which is better?
Tankless gives continuous hot water and takes less space, but costs more upfront and needs yearly maintenance. A tank is cheaper to install and simpler. The right answer depends on usage, fuel and install location.
Why does my tankless water heater run out of hot water?
A tankless unit doesn't run out, but it can be undersized for the number of fixtures running at once, so water turns lukewarm. Scale buildup and clogged inlet filters also reduce output.
How often does a tankless water heater need maintenance?
Most manufacturers recommend descaling once a year, plus cleaning the inlet water filter. Harder water may need more frequent service.
Are tankless water heaters worth it?
They're worth it when a household regularly runs out of hot water, wants to free up space, or plans to stay long enough for lower standby energy use to offset the higher installed cost.
Why does a tankless heater go cold in the middle of a shower?
Scale on the heat exchanger, a clogged inlet filter, or a flow rate too low to keep the burner on are the usual causes. Descaling and cleaning the inlet screen fix most cases.
How should a tankless water heater be sized?
By the hot water flow you use at once and the coldest incoming water temperature, which is in winter. A unit sized for summer can feel undersized in January.
Service area
Tankless Water Heaters across the Charlotte metro
- Tankless Water Heaters in Charlotte
- Tankless Water Heaters in Matthews
- Tankless Water Heaters in Mint Hill
- Tankless Water Heaters in Huntersville
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- Tankless Water Heaters in Gastonia
- Tankless Water Heaters in Cornelius
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- Tankless Water Heaters in Mooresville
- Tankless Water Heaters in Pineville
- Tankless Water Heaters in Indian Trail
- Tankless Water Heaters in Monroe
- Tankless Water Heaters in Waxhaw
- Tankless Water Heaters in Harrisburg
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Related
Services often paired with tankless water heaters
Water Heater Installation & Replacement
Replacing a water heater means sizing a new unit to your household, installing it to current code (expansion tank, relief valve drain, venting, drain pan where required), pulling the permit, and hauling away the old one..
Learn moreWater Heater Repair
Most no-hot-water problems come from a failed heating element or thermostat (electric) or a thermocouple, igniter or gas-valve issue (gas), and are repairable.
Learn moreGet help with a tankless water heater
Common sign: error codes on the unit display.