Tank vs Tankless Water Heaters: Head-to-Head Review


Even though it seems like the water heater does not play a significant role in one’s life, but to be honest, it does play an important role in one’s life. Everyone loves to maintain their hygiene, and nobody wants an ice cold water to bath with and because of that, one has to have a water heater at his or her dispense.

According to a lot of people, a Tankless water heater is better because of the simple fact that they are more efficient and smaller in size. However, this is not always the case with everyone and everyone has different priorities. Below is the comparison between the two so that you can decide which one is better for you.

Tank Water Heaters

Price with installation:

There are various forms of tank water heaters and an average cost of a 40 to 50-gallon tank, with installation, comes about $900 for an average household.


They are easy to install and are ready for use in a matter of a few hours. Heaters cannot tolerate the scorching heat of the sun and other weather conditions, therefore you have to install it indoor only.

Lifespan: Between 10 and 15 years

How they work:

They hold between 20 to 80 gallons of hot water and require a large space at your home. They are stored at a temperature of around 120° Fahrenheit.


  • More affordable upfront cost
  • Easy installation
  • Tried and true system
  • You always have fresh water at your service if, in case, an emergency arises.


  • There is a significant loss of energy from ‘standby loss’ which is the energy one wastes to keep a tank full of hot water.
  • Shorter lifespan
  • You have to wait for more hot water if you empty it.

Tankless Water Heater

A tankless heater will save you about $1800 on the life of tankless water heater. However, it does come with extra costs which may mean that this falls out of your budget.

Price with installation:

An average tankless water heater costs you about $3000 with an installation.


Because they are smaller in size as compared to tank water heaters, they do not take as much space as they can also be installed outside your wall. However, you might need to upgrade your home’s electrical system to operate it or, an alternative for this is that you might have to run a dedicated gas line to your gas-powered unit.

Lifespan: 20 or more years

How they work:

They heat your water as you please through electric coils or gas. However, they have a limit as well, on their flow rate. It takes time to heat the water as well.


  • Efficiency
  • Longer lifespan
  • Space saving
  • Tankless heaters typically offer longer warranties


  • Expensive
  • It may lead to massive changes to your house
  • The increased upfront costs might be too much for a normal person


Both tank water heaters and tankless water heaters have their own advantages and disadvantages and both are advantageous for a common man. We hope this guide helps you find what you’re looking for and what will be the most feasible option for you.

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