How long do tankless water heaters last

How Long Do Tankless Water Heaters Last

The purchasing of a water heater is a long-term investment. For around 13 years, tankless and – the-demand heats can be used up to 20 years in standard systems of tanks that store and heat vast volumes of water. The way that most households do heat water in this country is absurdly inefficient. To make sure that we already have hot water available as we want, we fill huge storage tanks with 40 to 50 gallons and then load them up with 24/7 energy per year. If it seems impractical and inefficient to you to still warm up your water in a big tank in your cellar, then a tankless heater is the best option for you.

What do Tankless Water Heaters do, and why do they Last?

Tankless water heaters provide hot water for you whenever you need it, for instance for a kitchen sink or when you turn the heater on. If you usually have to run water for some time to get it hot, this will save on water costs. It can also save on heating costs; it is heated on request, rather than holding water hot continuously. Although certain parts may be replaced to increase heater life, water quality and mineral content may also influence how fast corrosion happens, and the heater stays in working order. Water quality can affect tankless models, but they have reduced corrosion exposure.

Supply Issues :Residential tankless heater models can provide 5 gallons of hot water per minute, heated to 90 degrees Celsius. For a family that uses hot water for showers, laundry, and a dishwasher, this won’t be enough hot water — mainly if more than one item is run at the same time.

How Does a Tankless Heater Work?

The process begins when the hot water tap is turned on. See how does a tankless water heater work.

  • A flow sensor senses water coming into the heater and sends a signal to the control panel to begin hot water processing.
  • The control panel switches on the ventilator in a gas-fired unit, which draws in the fresh air, opens the gas valve that lets in the gas, and ignites the flame.
  • The heat exchanger captures heat from the flames and transfers it to the water, which moves through the tubing of the exchanger.
  • The mixing valve tempers the exchanger entering superheated water.
  • The panel will change the gas valve, the mixing valve, and the flow-regulating water valve accordingly if the temperature sensor can detech changes in the water that reaches or falls short of the target environment.
  • A sealed vent (or pair of vents) carries exhaust gasses through a roof or outside wall and transmits combustion air to the burner.

Tankless Water Heater Pros and Cons


Going with a tankless water heater has many advantages. From improved energy efficiency and decreased running costs to room savings and extended lifespan, let’s learn more about what makes tankless heater for good reasons.

  1. Although a tankless water heater costs more upfront, it will start to make up for your running costs down the road. When you need it, tankless systems provide the hot water on demand, so you don’t have to waste unused water heating energy.
  2. Although a standard tank water heater will last for 10 to 13 years, tankless water heaters can last up to 20 years. You’ll save a significant replacement fee if you intend to stay awhile at your house. Even if you’re not going to live in your home for that long, it’s good to pay it forward for homeownership’s overall cost savings.
  3. In general, modern water heaters with a capacity of 40 to 60 gallons are around 60′′ tall and 24′′ The shapeless metal tank will take on valuable real estate in a home where space is at a premium. The size of a large machine could, in contrast, probably be 20′′ long by 28′′ tall and just 10′′ deep.
  4. House owners are well conscious of the time it takes for a water heater tank to be drained before a house is closed down for the winter. It takes a couple of seconds to remove a tankless heater; then, unplug it.


Although the case may sound like a no brainer for tankless water heaters, there are many explanations why it may not be for you to go either route.

  1. A large tank water heater, which stores 40 or 60 gallons of hot water at a time, will satisfy your needs for a while, including showers, washing facilities, and other warm water. Additional supply is reheated very quickly by modern tanks, so it will possibly never run out of hot water if you need it. A tankless water heater has an entire cap and can still but often at a time deliver multiple gallons of boiling water.
  2. Although a standard tank water heater can be as small as $300–$400, the price can vary by up to $1000. But, if you look at a tankless water heater, you potentially have a considerable price gap of $200 to 300 (plus installation).
  3. A conventional gas water heater could heat your water by using 30,000 to 50,000 BTU of natural gas or propane. Perhaps 150,000 to 200,000 BTUs are needed to heat your water on request for the tankless water heater. You need to be sure that your electrical network is up to date if you think about switching to electricity instead of coal. In certain places too, the price of electricity is typically higher than petrol, so you have to take energy prices into account also.
  4. If the pipes have filled up excessively or the faucet and showerhead block the aerators or if the turned-down faucet limits the flow of water up to 0.3 GPM, these systems are automatically shut off.

How to install a tankless water heater

Try hiring a trained specialist for a tankless model when swapping your standard water heater. You will have to reconfigure the space for the new unit as well as delete the old group. It requires that the voltage and amperage specifications of the tankless heater be established for electrical systems and updated if needed. For gas systems, a new, more significant gas line and proper ventilation are likely to be expected.

Read more : install a tankless water heater .pdf


Lifespan is one of the reasons you can choose a tankless heater. You can have a lasting water heater, depending on the price, from 20 years to 30 years. It’s a decent investment, considering that you will have to upgrade it once or twice in your lifetime.

If you do the same calculations for water heaters for storage, that is around 5-6 replacements over the whole life. Hopefully, this article helped you understand how tankless water heaters are a successful investment if you find their durability and all the benefits they deliver.

Leave a Comment

Your email address will not be published.