Difference Between Tankless Vs. Tank Water Heater Guide?

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Are you looking to install a new water heater? For an average person, the process of choosing a new heater can be quite demanding. There are two main types of water heaters to choose from:

  • Tank Water Heaters or Traditional
  • Tankless Water Heaters

Before making a decision on the right one to serve your needs, you should consider all the relevant factors. This is a simple buyer guide, which should help you understand each of the water heaters, and eventually be able to pick the right one.

In order to make it easier for you to decide, we will consider the differences between the tank and tankless water heaters.


Which One is best Tank Water Heater or Tankless Water Heater?


Tankless Vs. Tank Water Heater

✓ The difference between Tank and Tankless Water Heating Systems:

The glaring difference between the tankless and conventional difference is quite diverse. The traditional water has a tank, which stores water and preheats it. The hot water can be used in the entire house for laundry, bathing or even doing dishes. The heater will keep refilling the water and preheating it in the tank.

The tankless water heater, on the other hand, uses the heat source, either electric or gas, to heat up water on demand. There is no option to store the water in the tank, which seems to be quite convenient.

However, to be able to fully understand the difference between the traditional tank and tankless water heater, here are some key comparison points, which will make it easier to get the difference:


 Convenience :

Everyone needs the convenience of having hot water anytime that they need it. The demand in your family is what will be used to determine which type of water heater would be ideal. Each of the types has its own set of convenience to offer and as such, you should look out for the one that is specific your household. As far as the convenience goes:water heater Convenience

  • The tank heaters will preheat water and store in the tank. If the hot water is used up the tank refills itself and starts to preheat the water, which may be limiting. The main advantage is that you can have hot water from multiple sources. This means that one person may be doing laundry, another taking a shower and another one running the dishwasher, and all of them will have access to hot water.
  • The tankless water heaters offer the convenience of having hot water on demand. The water will be heated as it comes from the faucet, which means that you can get hot water, without a limit. The major setback is that you can only use a single faucet at a time. In order to get hot water from multiple sources, you would need to install different tankless water heater units for each faucet. 

 Energy Efficiency:

Every homeowner tries to find solutions that would help conserve the energy so as to reduce the overall energy costs. There is a vast difference between the tankless and tank water heaters, when it comes to efficiency of energy consumption. Here is the difference:water heater Energy Efficiency

  • For the tank water heaters, they are always in operation, as long as they are turned on. This means that they keep using energy to heat water, even when it is not needed. You will end up paying for a whole lot of wasted energy. When the water cools down in the storage tank, the tank water heater starts to reheat up, once again, which can be costly.
  • The tankless water system will only heat water when you need to use it. This is why it is referred to as the on-demand or instantaneous water heater. The tankless water heater is designed in such a manner that it will save up on the overall energy costs. 
Water Heater Types Efficiency Rating
Conversational Gas Storage 0.60
Condensing Gas Storage 0.86
Conversational Elec Storage 0.90
Elec Heat Pump Storage 2.20
Tankless Gas 0.82

Cost Implication:

When looking at the cost implication of the water heater that you intend to install, you should factor the initial cost of purchase, as well as the long-term cost. This will help you make the right decision, whether to get a water heater, which is a quick solution or a long-term investment:water heater Cost Implication

  • The cost of installing the tank water heater is relatively low. However, it will cost you a whole lot in the feature since they tanks are subject to decay.
  • The tankless heaters tend to be quite expensive, of the upfront cost. However, in the long run, you will be able to save a whole lot on the monthly bills for the energy consumed. With the tankless water heater system, you will be able to reduce the overall energy costs by over 60%.

✓ Installation and Maintenance:

When considering a water heater, it is important to factor in the cost of installation as well as the maintenance. You should always look for a certified installer so as to ensure that everything is connected in the right manner so as to avert any possible danger. Once the installation is complete, the maintenance cost is quite varied in the two types of heaters:Installation and Maintenance

  • The tanks heaters seem to use obsolete technology and this causes them to have a number of flaws. The minerals in the water will build up inside the tank and as a result, they can only last for up to 12 years. The warranty is 6 years old, which means that after that period, you may start getting serious problems, associated with wear and tear.
  • The tankless water heaters are quite effective and use modern technology. Some of the best models will last for as long as 20 to 25 years, with a minimum warranty of about 10 years. The maintenance required is minimal and they are known to be quite durable.


  • If you are looking for great information about “How To Choose The Best Water Heater”  Read Here

✓ Which Water Heater to Choose?

With the factors that are highlighted above, you should be able to find a water heater that suits your home. It is advisable to find one that suits you lifestyle, water usage and the budget that you have set aside. The tankless water heater would be a great choice, due to its versatile nature and the convenience that it offers.

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Hey there, my name is Erik Larry, glad you found your way here. With my great experience with water heaters, you will be able to learn a whole lot on Sweet Home Insider. I have been installing and maintenance the water heaters for a number of years, and as a result, I have gained vast experience in this field. If you have any questions or comments, feel free to get in touch.