Tankless water heater supplies instant hot water as it flows through the device which is connected directly to the pipeline. The high thermal conductivity and corrosion resistance quality of copper heat exchangers makes it preferable for the tankless heater.

Tankless Water Heater

The wall-mounted set up saves a lot of space and the unwanted water flows through the pipeline preventing the leakage and rusting problem. 

The heater consists of the flow sensor which activates when water passes through and can be turned off the rest of the time. The system also consists of a modulating gas valve, inlet water temperature sensor and choke valve.

The tankless water heater can be conducted through electricity and gas as well, which makes it user-friendly providing either-or option.

The upper hand of the tankless water heater on the tank water heater is the continuous flow of hot water rather than a limited flow of heated water from the tank. The tankless water heater can be connected to the multiple points as per the requirement.

Along with the advantages come the disadvantages which include the high initial and installation costs with the requirement of some additional pieces of equipment. Some of the pros and cons of tankless water heater are stated below.

Pros of Tankless Water Heater

Tankless water heater needs the electricity connection not many accessories or equipment are required to install. After installation, instant hot water can be experienced.

Tankless water heater requires less maintenance and has a longer lifespan which adds on to the advantages. Here are some pros of the tankless water heater described below.

1. Continuous hot water

The tankless water heater ensures a continuous supply of hot water whenever needed. The water is heated by the rod inside the heater and passes the hot water through the tap.

The tank water heater doesn’t guarantee the continuous supply of hot water, once the tank is empty. But in case of tankless water heater, it’s connected directly to the water supply. This pros of tankless water heater prove its reliability and usefulness.

2. Longer Lifespan

The tankless water heater is designed to last double than of a traditional tank system. Most tank system needs to be replaced within every 10 to 12 years.

These tankless systems are designed to last 20-to-23 years which is gonna save lots of money. This property of tankless water heater shows its benefits and dependency. The lifespan of the heater is the advantage of the tankless water heater. 

3. Saves Space

Tankless water heater acquires the small space in your home’s basement, bathroom, kitchen. It is connected directly to the water tap and has smaller models. They are normally mounted on the wall and connected to your existing pipeline to obtain direct hot water.

It almost saves 60% of the space compared to the traditional system. It has many models with different shapes and sizes which can be installed according to the space available.

4. Decreases Pollution

The traditional water heater contains storage tanks with a propane-based tankless water heating system that emits CO2 whereas the tankless system doesn’t emit any greenhouse gases.

It converts fuel to heat for the supply of hot water and heat doesn’t emit any greenhouse gases. They use less fuel to heat the same amount of water compared to other tank-based water heaters. Tankless water heater is environment-friendly as they reduce pollution.

5. Avoids Issues Regarding Rust and Water Leakages

A tankless water heater provides low risks of water leakage. It is connected directly to the pipe of water supply which instantly passes hot water through the tap. This prevents problems like rust, corrosion or leakage of water. 

6. Less Maintenance

The maintenance is the least worrying factor of the tankless water heater. On the other hand, where traditional water heater requires time to time maintenance, the tankless water heater saves lots of time with this feature.

This system doesn’t acquire many pieces of equipment that reduce the maintenance problem. Minimum two servicing per year is enough for the better output in the tankless water heater.

7. Saves Money and Energy

The electricity used by the tankless water heater will be relatively low compared to the traditional heaters. The tank water heater has many complicated issues while installation and also the drawbacks in which case it benefitted the tankless water heater where all the problems are solved. These tankless heaters will save energy and money both.

8. Both Gas and Electric Option

There are models available with the dual option of electricity and gas. Tankless water heater increases efficiency by providing more than one option. The gas pipelines can be connected to activate the gas option or the vice-versa, according to the infrastructure and the preferences.

The tankless water heater provides various option expanding the functions and properties of the heater. The advantages of a tankless water heater include the dual feature of the heater.

Cons of Tankless Water Heater

The high installation cost and the high electricity bills are the main issues to be considered before applying them to your home. Inconsistency in temperature and water flow speed are the issues raised by the customers.

The additional equipment required can also be considered as the drawback of a tankless water heater. The cons of tankless water heater are stated below.

1. Fluctuating temperature

The heat of water depends on the water pressure or the speed of the supply. This impacts the temperature of the water in the shower and the tap water. If the multiple taps are open at the same time the result might be altered.

Most of the tankless water heater does not work if the water flow is very low, like to rinse toothbrush or piece of cloth. The inconsistency in temperature is the disadvantage of the tankless water heater.

2. Cost

The cost of this powerful device is high and the installation process is also complex. You need to hire professionals for the proper installation of the device.

The electricity bill will also increase after the system comes to daily-use. The cost of its part is high compared to the traditional heater. The con of the tankless water heater is also the cost required.

3. Low Water Flow

It is useful but has its limitation, the water flow rate will be slightly low than the normal tap. The tankless water heater is unable to supply hot water all around the house.

If the multiple heaters are connected in the house, the use of more than one heater at a time will affect the water supply. The disadvantage of the tankless water heater is the amount and availability of the water flow.

4. Extra Equipment and Expenses

The expenses on the extra equipment also add to its price. A water softener is required in the area where hard water is available, installing pipe if necessary, vent installation is a must if you want this kind of heater to work properly and maintain durability. It might occupy more space than estimated due to the addition of equipment. 

5. Installation of Vents

The burners used the heater are highly powerful and generate a large amount of heat. The vent has to be installed for its emission to prevent system failure.

The professionals are required for the installation of vent. This process is time-consuming and costly. The cons of the heater also includes the installation of vents.

6. Hard Water Supply Might Affect the System

The use of hard water decreases the lifespan of the system to two years maximum. It’s better to keep away hard water from the heaters, especially this kind of heaters.

It decreases productivity as the wastage and blockage in the supply might occur. The quality of water is a must for the durability of the device.

7. Electrical Issues

The energy required to operate the process is relatively high. The heater has to instantly generate the heat to supply the hot water which requires lots of energy. Three to four-hour use of water heater will consume 4,000 watts of electricity.

You need to think about it before you purchase it. If you add one more heater your expenses will be doubled and may even overload the electrical circuit if used at the same time. There are many electrical as well as cost issues which can be included in the cons of this kind of heaters.


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