Is Tankless Right for Your House?
It suits some homes very well and others only with changes.
A tankless heater fires a burner or an element only while hot water is flowing, which removes standby heat loss and the bulky tank. The trade-off is that the heater must raise the temperature of water quickly, which takes serious gas flow or electric capacity.
| Question | Tank heater | Tankless heater |
|---|---|---|
| Space. | Needs a floor footprint. | Mounts on a wall. |
| Hot water supply. | Limited by tank size. | Continuous, within unit capacity. |
| Gas line. | Usually the existing size. | Often needs a larger line. |
| Venting. | Existing flue often works. | Special venting is common. |
| Repair complexity. | Simpler parts. | More electronics and sensors. |
If your current tank has failed, our water heater replacement team can compare both paths with you.
What Has to Change in the House
Plan for four site items before ordering a unit.
- Gas supplyTankless units draw a lot of gas at once. We check pipe size and meter capacity.
- VentingMost units need sealed venting that differs from a tank flue.
- ElectricalEven gas units need a power outlet for the controls and fan.
- Condensate drainHigh-efficiency units produce acidic condensate that needs a safe drain path.
Gas Safety Comes First
Know what to do if something smells wrong.
If you ever smell gas near a heater, leave the building immediately. Call Atlanta Gas Light at 877.427.4321 or 911 from outside before you call a plumber. Do not use switches or a phone inside.
After any gas work we test every joint for leaks and check that the exhaust reaches the outdoors, because a tankless unit that is vented wrong can send combustion gases into living space.
Want to see if tankless fits?
Call the line and a plumber will check gas supply, venting path and hot water demand.
Sizing by How Many Fixtures Run at Once
Capacity is about flow, not tank volume.
A tankless unit is rated by how much water it can heat per minute at a given temperature rise, so a shower, a dishwasher and a washing machine running together can exceed a small unit. A large family needs a bigger heater or two units.
We count the fixtures in your house, ask which run at the same time and then recommend a capacity, and that conversation matters more than the brand on the box. An undersized tankless heater is the most common regret we hear about.
Cold winter groundwater lowers the incoming temperature, so a unit that works well in summer may feel weaker in January, which is why we size for the coldest realistic day.
Gas and venting work on a tankless unit falls under the state minimum codes, the 2024 International Plumbing Code (IPC) and the 2024 International Fuel Gas Code, both in effect since January 1, 2025. A licensed plumber should size the gas line and vent for the model you choose.
Tankless Maintenance That Keeps It Working
Scale is the main enemy of an on-demand heater.
Mineral scale builds inside the heat exchanger and slows flow over time. A yearly flush with a descaling solution removes it. The right interval depends on your water. Test your tap or ask Gwinnett County Department of Water Resources for current water quality information, because we do not assume hardness for any address.
Keep the intake and exhaust clear, and clean the inlet screen when the manufacturer calls for it. If error codes appear or the water turns lukewarm, call early, because small sensor problems are cheaper than a damaged exchanger.
What Changes the Price of a Tankless Install
Equipment is only part of the total.
- Unit capacityLarger units cost more and may need bigger gas supply.
- Gas line workUpsizing a gas line is often the largest add-on.
- Venting changesNew sealed venting or a new wall penetration adds labor.
- Removal and finishTaking out an old tank and patching the space are part of the scope.
You see the full price before work starts, and any scope change is discussed with you first.
Tankless in Peachtree Corners Homes
Local housing and utilities affect the decision.
Gwinnett County Department of Water Resources does not control water temperature at your tap, so any hot water complaint is a matter for a plumber. About 59 percent of Peachtree Corners housing is single-family, and many of those homes have garage or basement heaters that are easy to convert. Condos and townhomes in the city may limit venting, so we check the building rules with you.
We also serve Johns Creek, where larger homes often need two units for long hot water demand. Our water heater installation page explains the install steps that apply to both tank and tankless units.
Tankless Water Heater Questions in Peachtree Corners
It can be if you have the space need, the gas supply and a household that wants continuous hot water. We check gas line size, venting and demand before recommending one.
Usually yes, but the gas line and venting often change. We measure and quote those changes before work starts.
Yes. We flush scale, replace sensors and diagnose error codes on common models. The 24/7 line at (770) 214-4545 is open every day if a unit stops heating.
Plan on a yearly flush at minimum. The right interval depends on your water, so test your tap or ask the water utility for guidance.
Most units need electricity for their controls and fan, so they do not heat water during an outage unless you have backup power.
Write down the code and call us. Many codes point to venting, gas supply or a sensor, and early service avoids bigger repairs.