What Are Tankless Water Heater Pros And Cons? 

Before buying the tankless water heater you must know about tankless water heater pros and cons. Don’t go here and there, simply stay connected to this article till the end. Because here I will provide you with all the possible pros and cons of the tankless water heater in detail. Most of the time, you don’t give a lot of thought to your water heater. After all like most home appliances, if it is doing what it’s supposed to, then out of sight, out of mind. But if your conventional water heater is reaching its last leg or you are looking for a more energy-efficient water heater then you can go for the tankless water heater. Let’s know the tankless water heater pros and cons

What Are Tankless Water Heater Pros And Cons? 

Tankless water heater pros and cons are, 


  • Longer Lifespan 
  • Endless Hot  Water 
  • Energy Conservation 
  • Take Up Less Space  
  • Zero Risk Of Tank Exploding 


  • Higher Initial Cost 
  • Take A Time To Deliver Hot Water 
  • Cold Water Sandwich 
  • Inconsistent Water Temperature 

For further clarification, let me explain to you the pros and cons of tankless water heater one by one in detail. 

Tankless Water Heater Pros 

While looking for the pros and cons of a tankless water heater, let’s understand the pros first. 

  • Longer Lifespan 

So, the electric tankless water heater pros and cons claim that the tankless water heater is more durable and reliable than other kinds of water heaters. So, thank the manufacturer for such rugged and robust construction and materials, they typically have a long life expectancy and operating costs are usually very low. 

  • Endless Hot  Water 

The pros and cons tankless water heaters also claim that you can use hot water as much as you want or need. So, you don’t need to make complaints about tankless water heaters regarding the shortage of hot water. Because, regardless of its limited storage tank, it can provide continuous hot water as long as there is fuel or energy to heat it.

  • Energy Conservation 

The electric tankless water heater is more energy conservative than other water heaters.  Because the water is heated quickly and only when it is needed, it’s more energy-efficient. It will lower your electricity bills. 

  • Take Up Less Space  

If you have a small house, the tankless water heater is perfect for you. With the high price of real estate, many of us are tending to live in smaller homes and tighter space means that a giant 40 or 60-gallon storage tank that is 5 feet high and 2 feet wide is not exactly convenient. The tankless water hangs on a wall up and out of the way, providing more usable space on the ground.  

  • Zero Risk Of Tank Exploding 

The main difference between a tankless water heater vs tank is that tankless water has a zero risk of tank exploding. Because, as per its name tankless water heaters do not have a tank, there is absolutely zero risk of an exploding ever occurring. 

Tankless Water Heater Cons 

After taking a look over the pros, let’s understand the cons also. 

  • Higher Initial Cost 

The initial cost of installment and purchase is high as compared to other water heaters. With a switch in any technology, you may pay some initial upfront cost to get a tankless heater, both for the water heater itself and for the installation. 

  • Take A Time To Deliver Hot Water 

How do tankless water heaters work? So, when the hot water faucet is turned on, cold water flows through a heat exchanger in the unit, and either a natural gas burner or an electric element heats the water. Unfortunately, it takes time to deliver the hot water, because the cold water is already present in the pipe. 

  • Cold Water Sandwich 

One of the common disadvantages of tankless water heater is that tankless water heaters come across the term cold water sandwich. And it occurs when intermittent use of hot water causes you to feel an initial surge of hot water, followed by cold water, which quickly turns hot again. 

This was all about the RV tankless water heater pros and cons. You can buy electric tankless water or gas tankless water as per your choice, but before buying any of them go through the electric vs gas tankless water heater reviews once. 

You can learn much more on various topics on prozgo.com


What Is The Downside Of A Tankless Water Heater?

The main disadvantage of tankless water heaters is their upfront cost (unit and installation) is significantly higher than tank-style heaters. Including installation, tankless water heaters cost 3 times more than tank-style water heaters on average.

Is It Worth Switching To A Tankless Water Heater?

Tankless: Gas and electric tankless water heaters run more efficiently than the conventional water heaters of the same fuel type. We rated the annual energy consumption cost Excellent for a gas model but only Fair for an electric, but both rate Very Good for energy efficiency.

What Is The Most Common Problems With Tankless Water Heaters?

Most Common Problems With Tankless Water Heaters

  • Overload. Every tankless water heater has a flow rate capacity that should give you a good idea of how much hot water can be used simultaneously.
  • Cold Water Sandwich Effect.
  • Mineral or Sediment Buildup.
  • Flame or Ignition Failure.

Which Lasts Longer Tankless Or Tank Water Heater?

Life of the unit. When considering the life expectancy of each type of water heater, tankless heaters are expected to last longer. Estimates give storage tank water heaters about 10 to 15 years per unit, while tankless can last for 20 years or more.

Do Tankless Water Heaters Use A Lot Of Electricity?

The EPA estimates that a tankless water heater uses up to 34% less energy than a storage tank water heater if you use 41 gallons or less of hot water daily.

How Many Showers Can A Tankless Water Heater Run?

A unit heating more than 7 gallons per minute can typically handle two showers and a large appliance. *Important to note: Tankless units do not literally provide “instant hot water” – the hot water still takes time to flow from the unit to the faucet.

What Is The Life Expectancy Of A Tankless Water Heater?

20 years

On average, a tankless water heater can last up to 20 years with proper yearly maintenance. With a copper tankless heat exchanger, your tankless water heater has a warranty of 12-to-15 years.


Well, you know about the pros and cons of tankless water heater vs tank in detail. As you all know, no one wants to remain traditional but everyone wants to go for new technology and modernity. And the tankless water heater is also a modern and high-tech water heater. It has been manufactured after much research and after considering all factors like space, efficiency, cost, fuel cost, etc. And these all factors make it a complete product which you should buy after reading tankless water heater pros and cons


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What are the pros and cons of a tankless water heater?