Tank vs Tankless Water Heater – Pros and Cons

For our everyday household activities, we need hot water. Among various types of water heaters available in the market, which one will be the best for you? Particularly, between tank vs tankless water heater- what is the best way to heat water? This is a very common question among water heater users.

During taking a shower or washing our hands, we need a lukewarm water. A scalding water might also be necessary for some other usage. You will enjoy a comfortable life if you can find a suitable water heater for you that best fit to your utility pattern. In contrast, a water heater may discommode you if you don’t choose it correctly. If you are in a rush, you might need hot shower water without waiting for a second. You might want warm water to clean your pan right after finishing cooking without any wait.

Comparison: Tank Vs Tankless Water Heater

If we want to know the differences between instant water heater vs storage water heater, we have to discuss pros and cons of both of the types.

Definition of Tanked Water Heater

A storage tank water heater has a water reservoir having a varying capacity ranging from 20 gallons to 80 gallons. It has one inlet water tube and another outlet hot water tube. Inlet water instantly refills the tank when the hot water goes out of the tank. Natural gas or propane is the most commonly used fuel for a storage tank water heater. But electricity is also not very uncommon.

Advantages (Storage-tank water heater)

1. If we compare tankless vs tank water heater cost, initial expense of a storage-tank water heater is lower. Therefore, if you do not have enough money in pocket, you can have a storage tank water heater.

2. Regular maintenance and repair cost is lower due to the simple construction of this kind of machine.

3. As long as the tank is full, you can use as many faucets and showers as you can. Output speed is not a problem for this type of machine. Therefore, you can get simultaneous supply of hot water to the entire household.

Disadvantages (Storage-tank water heater)

1. Standby heat loss: if you need a very small amount of water, the entire water inside the tank has to be heated. After you are done with using hot water, there is still a tank full of hot water which will become cold over time. For your next use, the whole tank has to be heated again. Therefore, a tank full of hot water has to be standby for any small amount of use. These are not energy efficient water heaters.

2. If the tank is empty, you will have to wait for long time to get output water. We have already mentioned the reason- whole tank full of water needs to be heated first to get the output. Therefore, you will not like to be the last person to take the shower.

3. Lifespan of storage tank water heater is less than the lifespan of a tankless hot water heater.

4. If any leakage problem, gallons of water can escape and create problems for the household.

Definition of Tankless Water Heater

A tankless water heater does not reserve water inside it. There is a heat exchanger inside the machine which heats up the water when any flow is generated inside the pipe line. After the sensor senses the water flow, the machine wakes up and starts working. An on demand tankless water heater can be of two types- electric and gas run instant water heater, based on the type of fuel it uses.

Advantages (Tankless water heater)

1. Does not need to be continuously heated up the water. Therefore, comparatively more energy efficient and no standby loss.

2. If we investigate tankless water heater reviews, its lifespan is longer than the life of a storage tanked system.

3. Compact size: you can set the machine in a very small space at home.

4. Portability: tankless water heaters are compact in size and suitable for campers. Using propane gas as a fuel, you can set it up with your RV.

5. On-demand water: you need not to wait for water. A tankless machine can supply you hot water instantly.

Disadvantages (Tankless water heater)

1. Among the problems with tankless water heaters, initial expense is a major negative. Installation cost is also higher than storage tank water heater.

2. As these are newer technology, during installation, you might need some major changes in your utility lines.

3. You might know the dangers of tankless water heaters due to carbon monoxide diffusion. If there is a leakage, this gas can cause serious health hazard. Therefore, you need to install the heater properly and have a regular maintenance.

4. A tankless water heater can heat whole house sufficiently only if the capacity of the heater is substantial.


Bottom Line

After reading the comprehensive discussion about advantage and disadvantage of normal vs instant water heater, I think you have got the basic idea about both of this types. Considering all the pros and cons, tankless water heaters wins by a mile on our judgement. Only if you have a money problem or have a definite small timeline to use a water heater, you can go for storage tanked system. Tankless systems are with modern technology. These are safer, energy efficient and compact. But if you have a big household, need multiple output spontaneously, you should be concerned about the maximum output speed of your tankless system during checking the technical specification.

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