A tankless water heater heats water as it flows instead of storing it. That saves space and can give endless hot water, but it demands correct sizing, venting and gas supply.
We install, repair and flush tankless units. Call (440) 468-0237 to ask about your heater or a planned swap.
Is tankless right for your house?
Good fit when
- Space is tight
- Household uses hot water steadily
- Gas line and vent can be upgraded
- You plan to stay several years
Think twice when
- Gas line is undersized
- Venting is hard to route
- Only one small bathroom is used
- Upfront cost is the main concern
The honest answer depends on your gas line, vent path and hot water habits. We will tell you if a tank is the better choice.
Sizing: can it run two showers at once?
Tankless units are rated by flow in gallons per minute at a temperature rise. Cold Ohio incoming water means a larger rise, which lowers flow. A unit that looks fine on paper can fall short in January.
For a one-shower household, a smaller unit often works. For two or three showers plus a washer, choose by peak demand, not by average.
Flush and descale: what it is and when
Mineral scale builds inside the heat exchanger and reduces efficiency. A flush circulates a descaling solution through the unit to dissolve it.
Hard water speeds scale. Cleveland Water's 2025 report lists hardness of 105 to 130 ppm, averaging 117, so annual flushing is a common recommendation. Check your own water and the manufacturer's schedule. Our water softener and filtration page covers reducing scale at the source.
Common tankless problems
| Symptom | Likely cause | Fix |
|---|---|---|
| Error code and no heat | Scale, vent or flame sensor | Descale, clean sensor |
| Lukewarm water | Undersized unit or scale | Check flow, flush |
| Hot then cold | Low flow or sensor issue | Clean inlet filter, test |
| Condensate backup | Clogged drain | Clear line, neutralizer |
| Gas smell | Leak | Leave and call gas utility first |
Venting and gas line
A high-efficiency tankless unit often vents with plastic pipe through a wall or the roof. Gas input is much higher than a tank, so the gas line may need upsizing.
Ask for a plan that names the vent route and the gas line size before the purchase. If you are comparing it with a tank, our water heater installation page lists code items for both.
Do tankless units need an expansion tank?
A tankless unit stores almost no water, so the unit itself does not need one. Whether the house needs an expansion tank depends on the plumbing, for example a pressure reducing valve or backflow device that makes it a closed system.
The installer checks and tells you. Do not skip the check.
Gas or electric tankless
Gas tankless units deliver high flow and suit whole-house use, but they need a sized gas line and a vent. Electric tankless units avoid venting but draw a lot of current, and many older panels cannot support a whole-house model.
A small electric unit can serve a single remote sink or a one-shower bath. Before you choose, we check the panel capacity and the gas meter and line size, because those numbers often decide the question for you.
We also ask what the heater will replace. Swapping a 40 gallon tank in a basement is a different job from feeding a second-floor bath, and the plan should name the pipe route.
Codes that apply to a tankless install
A tankless unit is installed to the manufacturer instructions and to the Ohio Plumbing Code, which is based on the International Plumbing Code (IPC). Venting, gas piping, condensate drainage and the relief arrangement are all inspected items.
The city of North Olmsted asks the permit holder to arrange inspections with 24 hours notice, so we plan the schedule with that in mind.
What affects the price of tankless service
What drives the cost of a tankless job
You approve a price first. Work follows only after that approval. A tankless install costs more than a tank swap. Insurance does not cover planned upgrades. Dial (440) 468-0237 for the numbers on your situation.
Planning tankless or flushing one?
Call and tell us the model, age and what it is doing.
Questions about tankless water heater
Many manufacturers suggest about once a year, more often with hard water. Check your manual and your water test.
It depends on the unit rating and your incoming water temperature. A larger unit handles it, a smaller one may not in winter.
We repair common brands. Tell us the model on the phone so the technician can plan parts.
It can lower energy use compared with a tank in some homes, but installation costs more. Savings depend on use and fuel prices.
Note the code and call. Many codes point to scale, venting or a flame sensor, and some are simple fixes.
Need a flush quote? Call (440) 468-0237.