A tankless unit rethinks the whole idea of a water heater. There is no tank to keep hot, so no energy is spent reheating stored water while you sleep or travel. When a faucet or shower opens, the unit senses flow and fires, heating water on demand through a heat exchanger. The result is a continuous supply for as long as you stay within the unit's rating, a compact footprint on the wall, and a lifespan that can be nearly double that of a typical tank. Homeowners in Marietta, GA often choose tankless during a replacement or remodel for exactly those reasons.
Sizing is where tankless installs succeed or fail. We work from two numbers, flow rate and temperature rise: add up the fixtures you realistically run at the same time in gallons per minute, then factor in how cold the incoming water gets in winter, since a unit that delivers five gallons per minute at a mild rise may deliver far less when the groundwater is cold. Then comes the infrastructure. A whole-home gas unit can draw 150,000 to 199,000 BTU, which often means a larger gas line or a meter check. Venting must match the unit, and electric tankless models can need a large share of your electrical service, sometimes enough to require a panel upgrade.
We install every tankless unit with its future maintenance in mind. That means isolation valves for descaling, a gas line with a sediment trap sized for the burner's full demand, venting that meets the manufacturer's rules for length and termination, and a condensate line with a neutralizer on condensing models. Where water hardness is high, we explain scale protection options before the unit goes on the wall. Optional recirculation can shorten the wait at distant fixtures. We handle permits where required, test the unit at full flow, and show you how it works. Call (770) 215-1748 from anywhere in Marietta for a demand assessment and a clear quote.
What homeowners call us about most is Water Heater Installation in Marietta. That's the place to start for most homes.
Warning Signs to Watch For
A heater that is starting to struggle rarely hides it for long, and the clues are easy to spot once you know them. Keep an eye out for the following:
- A tank that cannot keep up with your household's morning routine
- A far-off sink or bath where a point-of-use unit could help
- Limited floor space in a closet, garage, or utility room
- Adding a bathroom, soaking tub, or larger shower that needs more hot water
- Wanting a unit that can last up to twice as long as a typical tank
- Paying to keep a full tank hot even when no one is home
- A water heater near the end of its service life, making this a natural time to switch
- Renovation work that makes gas line and vent changes easier to fit in
Early Action Saves Money
A little rust-colored water or a relief valve that drips now and then can be the first hint of a tank that is close to the end. If you notice any of these signs, contact Marietta Water Heater at (770) 215-1748 for a prompt inspection.
Get Tankless Water Heater Installation Handled Today
Our experienced technicians are standing by to help.
Get Help: (770) 215-1748Common Questions We Hear
Why This Job Calls for a Pro
Buying the right unit is the easy part. The other half is making sure your home can support it. Gas tankless burners can fire at close to 199,000 BTU, so the size of the gas line, the capacity of the meter, and the pressure at high fire all have to check out. Vent materials, lengths, and terminations are set by the manual and the code, and condensing units add a condensate drain that should be neutralized. Electric whole-home units can pull more current than an older panel can deliver. Miss one of these, and the unit underperforms or becomes unsafe.
Our job is to make tankless work the way it is supposed to. That starts with sizing for your busiest hour and coldest water, then confirming your gas, venting, and electrical can support the unit. We install with service valves for descaling, proper relief valve discharge, and venting built to the manual, then test under real demand before we leave. If a tankless unit is not the best choice for your home, whether because of cost, gas supply, or usage patterns, we say so and help you compare other options honestly.
From Your Call to Hot Water
Every visit follows a step-by-step method built around testing first and replacing parts only when the readings call for it. Here's exactly how a typical visit unfolds:
Size It Right
We count the showers, sinks, and appliances that run together, then size for the coldest incoming water of the year rather than a mild day.
Gas, Venting & Power Check
Gas line size, meter capacity, vent routing, condensate drainage, and electrical service all get checked, so there are no surprises.
Careful Install
Every connection follows the manual and local code: gas, venting, relief valve discharge, condensate, and isolation valves for future maintenance, with permits handled where required.
Full-Flow Testing & Walkthrough
We fire the unit at full demand, check gas pressure under load, confirm the vent and condensate work, set the temperature, and show you how everything operates.
Tips to Keep Your Water Heater Healthy
A little routine care goes a long way toward keeping a water heater running well past its expected lifespan. Put these technician-approved steps to work at home:
- Make sure the outside vent and intake are never blocked
- Pay attention to error codes; they point to issues that are cheaper to fix early
- A setting near 120F limits scalding and reduces scale formation
- Clean the inlet water filter screen a few times a year
- Treating hard water protects the heat exchanger from mineral buildup
- Do not cut power to a unit in a cold space, since its freeze protection needs electricity
- Flush the unit with a descaling solution annually to keep scale off the heat exchanger
DIY vs. Professional Tankless Water Heater Installation
Online videos may help in a pinch, yet lasting repairs and code-compliant installs depend on correct venting, proper relief valve discharge piping, and a trained technician. Here's how the two approaches stack up:
| Factor | Doing It Yourself | Professional Service |
|---|---|---|
| Capacity | Guessed from the old tank size | Calculated for your coldest months |
| Gas Line | No check of meter or pressure | Piping sized to the burner |
| Exhaust | Old flue reused or wrong vent material | Venting built to the manufacturer's specs |
| Electrical | Panel capacity not checked for electric units | Dedicated breakers sized correctly |
| Maintenance Access | No isolation valves, so descaling is a hassle | Scale protection discussed up front |
| Outcome | Performance that falls short in winter | Safe, inspected, and working as designed |
Let's Get Your Hot Water Back
The sooner you call, the sooner the hot water is back. Reach Marietta Water Heater for fast service.
Get Help: (770) 215-1748Tankless Water Heater Installation Across the Marietta Area
We bring tankless water heater installation to homes and businesses in town and across the nearby communities. Pick your area to see local details.