Tankless Water Heaters in Carmel and Indy: Are They Worth It?

Tankless water heaters promise hot water that never runs out and a unit that hangs on the wall instead of taking up a corner. For a lot of Central Indiana households they are a great fit, and for some a good tank still makes more sense. Here is how to tell which camp you are in.

How a tankless heater works

A tank heater keeps 40 to 80 gallons hot around the clock. A tankless unit stores nothing. When you open a hot tap, water flows through a heat exchanger and a gas burner heats it on the spot. Close the tap and it shuts off. We install Navien gas tankless units, which use electronic ignition with no standing pilot.

What homeowners like about them

• Hot water that keeps going. Back-to-back showers, a filled tub and a load of laundry do not drain anything, as long as the unit is sized for your use.

• Space back. A wall-mounted unit frees up floor space in a basement, closet or garage. That matters when you are finishing a basement in Carmel or Westfield.

• Lower standby energy use. There is no tank to keep hot while everyone is asleep or at work.

• Longer life. With regular descaling, tankless units often last 15 to 20 years, and many parts can be replaced instead of the whole unit.

What to plan for

Hard water

This is the big one in Hamilton County and the Indianapolis area. Scale builds up inside the heat exchanger, and a tankless unit in hard water needs to be descaled on a regular schedule. Pairing it with a water softener makes a real difference. Homes on well water in outlying areas often have even harder water, so we check that first.

Gas line and venting

A tankless unit uses a lot of gas while it runs, so the gas line often needs to be larger than what fed the old tank. It also needs its own venting, usually PVC run through a sidewall or the roof, and a condensate drain. We check all of this on the first visit.

Older homes in North Indianapolis neighborhoods like Meridian Hills, Nora and Broad Ripple are more likely to need a larger gas line from the meter. Newer homes in Carmel, Fishers and Westfield are often easier to convert because the mechanical room is roomy and gas service is modern.

Flow limits

Tankless does not run out, but it has a maximum flow rate. The unit has to be sized for how many fixtures you run at once and for our cold winter groundwater. A properly sized unit handles several fixtures at a time.

Up-front investment

A tankless install is a bigger project than a tank swap. Right now we offer $500 off any tankless water heater installation, and your plumber gives you options and a price for tank and tankless side by side before any work starts.

A short wait for hot water

Tankless does not make hot water appear at the tap faster. Water still has to travel through your pipes. Many Navien models offer built-in recirculation options that cut that wait.

Who gets the most out of tankless

• Busy households that run out of hot water with a tank

• Homes with a large soaking tub or several full baths

• Owners planning to stay in the home for years

• Anyone finishing a basement who wants the floor space

• Homes already on a water softener, or willing to add one

When a tank is the better call

• One or two people with light hot water use

• Plans to sell in the near future

• A gas line or venting route that would take major work to upgrade

• No interest in periodic descaling

A new Bradford White tank is a solid, dependable choice, and we currently take $50 off any tank water heater installation. Offers cannot be combined with our 10% price match.

What a tankless install looks like

1. We check gas supply, venting route, water quality and your hot water needs.

2. We drain and remove the old tank and haul it away.

3. We mount the unit with isolation valves for future descaling.

4. We connect water, gas, venting and the condensate drain, and pull the permit.

5. We fire it up, test it and show you how it works.

When to call us

If you are weighing tank versus tankless, or your current heater is near the end, call or text us for a visit. See our water heater repair and replacement page for more on what we install.

FAQ

Can a tankless heater go where my old tank was?

Often, yes. The unit mounts on a nearby wall, and we route venting and gas to it. We confirm the location works before you commit.

How often does a tankless unit need maintenance?

In our hard water, plan on descaling it on a regular schedule, commonly once a year, and cleaning the inlet filter. With a softener, it can stay cleaner longer.

Will I need a bigger gas line?

Many homes do, because tankless units draw more gas while running than a tank burner. We measure the existing line and your other gas appliances to find out.

What happens during a power outage?

Gas tankless units need electricity for their controls and fan, so they will not heat water without power. A tank with a standing pilot can keep supplying some hot water during an outage.

How do you size a tank versus a tankless unit?

A tank is sized by its first-hour rating, which tells you how much hot water it can deliver in a busy hour. That number matters more than the gallons on the label. A tankless unit is sized by flow rate: how many showers, faucets and appliances you want to run at the same time.

Can you replace an old tankless unit?

Yes. If you have an older tankless heater that is failing, we can repair it when that makes sense or replace it with a new Navien unit.

Does tankless add value to a home?

Many buyers see it as a plus, especially with the space savings. The bigger benefit usually goes to the owner who lives with the endless hot water for years.

Curious if tankless fits your home? Call or text (317) 731-3028, or see our recent work.