Tankless Water Heater Cost Calculator

Want to know how much Tankless Water Heater Costs? Estimate prices of Installing a on-demand water heater to replace your old 40 gallon tank. Not sure what if you want Gas or Electric? This tool will account for needs to add a power venting module (for Gas) or upgrading your electrical panel to 200 Amps if needed.

Estimate Tankless Water Heater Costs Now!

Fuel Type
Vent Type
Quality
Job Type
US Region

Low End
$0
Mid Range
Estimated Price: $0
High End
$0

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How to estimate tankless water heater installation price:

It takes only 10 seconds to estimate cost of installing an on demand water heater. Here is how to use this calculator:

  • 1) Select your fuel source (Gas or Electric). This will be a major deciding factor for how much you will have to spend.
  • 2a) If Electric: Select your current electric panel (AMPs) and how many people live in the house.
  • 2b) If Natural Gas: Select if your gas heater can be direct vented into chimney OR needs a power vent. In most cases you will need power venting option. We recommend you price it both ways. Difference is about $470 extra for power venting.
  • 3) Select the “quality” of your water heater: As with most other things tankless water heaters can be cheap or expensive, depending on Brand, Options, and other factors. Many gas heaters can range from $600 to over $2000. I do think “premium” option is excessive and unnecessary, but would recommend staying away from many cheap brands, due to reliability concerns.
  • 4) Select if this is a new construction OR retrofit (replacing old leaking tank) job: It is much easier to install tankless water heater in new home – you don’t have to worry about clutter, moving pipes/electric cables, etc. Everything is pre-planned, or can be easily adjusted.

    However, if it is a new construction home, you will need to go “Power Vent” 99% of the time, as new homes don’t have masonry chimneys.
  • 5) Select your region: Use the region map below to see where your state is, so you get a more locally adjusted price. Local prices vary as much as 30% affecting installation costs, from most expensive Pacific region (WA, OR, CA) to least expensive West South Central (TX, AR, LA, OK).



How much water heater costs?
Water Heater Repair
$250 - $350
40 Ga. Water Heater
$850 - $1100
Tankless Water Heater
$1200 - $3500

See costs in your area Start Here - Enter Your Zip Code



Prices are calculated based on data from 100s of HVAC and Plumbing contractors in US, and accounts for additional labor that may be involved when switching to on-demand tankless water heaters for your home!

What different price ranges mean

You will get 3 price ranges – Low, Mid and High. This reflects different price quotes that you may get from Plumbing / HVAC contractors, depending on how competitive / busy they are, overheads, and profit margins. Often low-cost estimates mean that contractor is not insured and may even be unlicensed (which is very critical when working in plumbing, with gas or electricity).

Often contractors will not have a master gas piper or master electrician, may not pull job permits, and will try to do things they are not licensed for. So keep this in mind and verify licenses and insurance certificates, when getting quotes.

Which tankless water heater should you get (gas or electric)?



This is a great question that I may not be able to answer (meaning you will have to make that decision).

Here are some pros and cons of Tank and Tankless units:

  • Gas on demand water heater will cost less to operate (lower energy costs) but is more expensive to install.
  • Electric tankless water heaters are less expensive to buy and install, but will cost more to operate in both energy costs and maintenance (primarily changing heating elements).
  • Electric option may also require service panel upgrade to 200 Amps (see below)
  • Tankless option will (almost) always be 2-3 times more expensive to install, compared to storage tanks (50 Gallon)

    Figure average $1000 for storage tank vs $2000-$3500 for tankless.
  • Tankless has much longer life span, because there is no TANK, which is the prime failure point of traditional water heaters, no “tank pressure”, valves, leaks, etc.
  • Tankless costs the same as 2 or 3 storage tank units. So if your 50 gallon tank lasts 6 years, and you replace it 3 times, life span will be 18 years and cost will be $3000. Tankless will last 12-18 years and cost per year will be similar to tank.
  • If your power goes out, or gas stops flowing, you won’t have hot water (with tankless), while tank will always have a reserve of about 40-50 gallons of hot water!
  • * Electric Option Notice: Electric water heaters had use as much as 36KW(!!!) of electricity, or 150 Amp maximum power draw. If you have a 100 Amp service, your water heater will not work (unless you get the lowers 9KW unit, which is only good for 1-2 people living in the house) and provides 2 gallons per minute.

    You will often need to upgrade your electric service (circuit breakers panel) to 200 Amps or more, which will cost $900-1200, so when you select your current service to be 100-150 amps, the calculator automatically ads $1054 to your quote.



    How much water heater costs?
    Water Heater Repair
    $250 - $350
    40 Ga. Water Heater
    $850 - $1100
    Tankless Water Heater
    $1200 - $3500

    See costs in your area Start Here - Enter Your Zip Code



    Published/updated on: March 9, 2017

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