Home Improvement

What are the Advantages and Drawbacks of a Tankless Water Heater?

You might wonder if upgrading to a tankless water heater would be worth it – especially if you want to move in the immediate future.

To decide whether this device is suitable for you, it is necessary to consider the advantages and disadvantages of immediate hot water before removing your current heater.

Here we sorted the advantages and drawbacks of tankless heaters so you can quickly determine whether to buy one or not.

Is Tankless Heater Really Worth It?

Tankless water heaters aren’t like the traditional ones that use storage tanks. Instead, they generate hot water only if you want to. When you turn on the tub, a regular water heater immediately draws hot water from the tank.

If you have a water pump without tanks, the shower would instead drain water, and the source would freshen the water, heating it quickly as it flows through the pipes and passes the warming elements.

Water Heater Without Tank: Is it Beneficial?

One of the newest tools to create a more energy-efficient house is by using tankless water heaters. Unlike conventional systems that constantly heat and reheat water, tankless heaters produce heat with hot gas burners or electrical belts. In addition, they can generate water immediately. Yes, instant heating takes more energy, but when water does not have to be heated again and again, tankless systems consume less energy as a whole as compared with a traditional “tank” model.

Consumer reports show that gas-powered tankless water heaters, instead of conventional water heaters, are about 22 percent more powerful. Is there already a catch? Well, well, yeah. A tankless heater is the safest solution in this case.

There’s virtually no risk of a disastrous leak since there is no tank. Moreover, tankless heaters have been increasingly advanced since they were launched in the United States in the 1990s, including features like built-in recycling pumps and a wireless connection informing you exactly when you need the maintenance.


High Reliability

In general, tankless water heaters are more energy-efficient than conventional storage options: on-demand energy heaters can be 8% to 50% more efficient.

This is because a water supply without a repository diminishes the requirement for a monstrous holding tank that is helpless against reserve energy misfortunes (i.e., misfortunes of warmth from the water after some time as it sits unused in your tank).

The range of performance depends on various factors such as the use pattern and device type on your water heater set-up. The use of point-of-use waterless tank heaters, for example, preserves more power than the use of a complete installation.

Saving for the Long Run

Based on the start-up cost of tankless water systems and the degree to which you need to plan cables, water lines, and gas lines for your house, is relatively high.

While there can be high starting expenses, tankless radiators last more than conventional water warmers, and most land owners can anticipate that a 12 to 26-year reimbursement cycle.

You are generally speeding up the payback period for electric tank-free versions than for gas-free ones.

Friendly for the environment

Tankless water heaters are more effective than storage systems, which means that the same volume of water is heated using less power. The efficiency of conventional tank options ranges from 40% to 60%, but tankless heaters’ efficiency can be between 80% and 99%.

Tankless systems will also turn one fuel unit into almost one whole heat unit. Reducing your fuel use helps to reduce your environmental

Hot Water Immediately

Once the cold water is flushed from the tanks, the tankless water heaters will almost immediately supply the endless stream of hot water. Those units will therefore instantly supply heat without the inconvenience of cumbersome storage tanks.

Longer Life-Span

The long lifetime of tankless units is a tremendous advantage. It takes around 10 years to get a standard, high-quality water heater, while tankless ones are two times as long.

Reduce Cost

While these devices are costlier it rests assured that they are effective. Based on Consumer Reports, tankless heaters are 22 percent more powerful than conventional versions. Savings may be negligible monthly, but homeowners may expect hundreds of dollars to be saved per year.

Save Your Storage

Water heaters without tanks are much smaller than the bulky versions. Installers generally place them onto a cellar wall in an unexpected place. Space advantages are a welcome advantage in smaller dwellings.

Tax breaks and special funding

Since they are more efficient, federal tax credits are granted to tankless heaters that help to compensate for steep installation costs.

The 10 percent tax cut even applies to conventional, Energy Star-certified storage heaters.

Dispose of “Standby Loss”

The most significant benefit that is eliminated when using tankless water heaters is the “standby failure”. Traditional units repeatedly reheat the water and increase the energy cost each time. The conventional heater uses electricity even when nobody is home since it is already heating the water.

Endless Hot Water Supply

Having a tankless heater means that everyone has a hot shower to enjoy, so they don’t rely on reserved water to satisfy demand, as long as they are taken consecutively and not at the same time.


Though natural gas mainly supplies tankless water heaters, electric versions are now available on the market.

Offer Extended Warranties to Tankless Heaters

Tankless heaters have more extended warranties due to their long lifetime. So, the landlord will not pay for maintenance or feed the replacement bill. If anything goes wrong, warranties will last up to 20 years, the total lifetime of a tankless heater.

Great for Small Home

These functional units remove standby and provide sufficient instant hot water for washing the dishes, clothes, and making food for two or three persons.

Remote Linking

Some tankless heaters can be connected to an app and can be changed as an “intelligent home” feature. Save energy when you are out, then activate the device so that when you get home, the hot water is ready for a bath or shower.

Approximately 50 or more gallons of water hold an average water heating tank. This could cause a big mess and much water damage if your tank is leaked!

A tankless water heater will only do as much harm as an irrigated faucet, but you have no disaster to think about!

Lower Leakage and Water Damage Risk

One of the greatest threats for tank-type heaters is, over time, the formation of minerals from hard water into the tank leading to degradation and ultimately, leakage.

This does not mean all water heaters without tanks are resistant to problems. They will and will experience issues that can lead to leaks, but there is little risk of a significant leak that floods the entire basement and does considerable harm.

Tank Explosion: Zero Risk

Today’s plumbing code specifies all water heaters in the tank to use a temperature and pressure reduction valve that allows pressure to be released and prevents it from overflowing. The valve may be blocked and stemmed from working correctly by minerals and debris from the waters over time.

A dangerous pressure will build up and jeopardize you if this happens. Explosions are a significant danger for tank-style water heaters, even if seldom occur. Fortunately, because tankless heaters do not have a tank, the chance of an explosion is minimal—something not to worry about.

Lower Burn and Toxic Metal Exposure Risk

Many experts contend that tankless water heaters are cooler than the ones with tanks. Besides having minimal risk of exploding, they also have more precise temperature control, reducing the risk of hot water being burnt.

Often, as I said earlier, heaters in the tank style break down over time because of hard water that rusts and corrodes the inner tank lining.

These minerals and fragments can enter the water and expose the usersto toxic toxins.

Although the water source of tankless water heaters does not remain in a corrosive tank, the water they supply over the whole lifetime.


Flow Rate Is Limited

You are hard-pressed to keep anything hot with a single-core, all-house tankless water heater if you intend to operate multiple appliances that use warm water simultaneously. You would need to add a few point-of-use systems or stick to a storage tank heater for assets that use more than 40 or more gallons of hot water each day.

High cost in Advance

A tankless water heater needs a more significant investment than conventional storage tank heaters from a financial viewpoint.

Complex Setup Needed

You could also spend more money on replacing or extending the water supply tanks, gas pipes (for gas units), and electrical wiring in addition to the high upfront costs of tankless hot water appliances to maintain a tankless system. This could include the hiring of plumbers or electricians to set you up properly.

Temperature Is Inconsistent

Incompatible water temperatures are one of the significant purchaser claims listed in the Consumer Reports survey. Usually, this problem stems from the failure of the boiler to deliver sufficient hot water to many outlets concurrently.

High Primary Cost

Its lifetime increases the cost of tankless units. The conventional average price is approximately $500, and the cheapest tankless options start at $1000. The cost to install these advanced models is often higher, but labor costs must also be considered.

Take Longer to Provide Hot Water

Another disadvantage of tankless water heaters is that it takes longer for warm water to be produced and delivered than tanks.

Notice that water heaters without tanks cannot supply hot water to be pumped as soon as you need it. The silent water in pipes is cold or room temperature when you turn on a hot water tap.

Restrictions In Supply

Standard versions simultaneously heat several gallons of water – ideal for those taking a washbasin or a tub.

However, a tankless cupboard heater is not designed to maintain whether the dishwasher or laundry machine.

A conventional water heater, depending on the type, can hold between 30 to 80 gallons cannot provide hot water on multiple outlets at the same time.

Often Needs Additional Equipment

A water softener is usually needed to ensure that the tankless heater works properly which adds to the original price tag of the machine.

A softener would also avoid the space-saving advantage as the voluminous softener takes up spaces next to the wall-mounted heater (apart from the requisite salt bags). Currently, this device can take up more room than a conventional heater.

During Power Failure there’s No Access to Warm Water

When there’s a strong wind where the electricity in your house will be out. The gas or electricity will power tankless water heaters, but the electric plate supports gas-driven water heaters.

Therefore, whatever the kind of water heater you have, you will be out of hot water in case of a power failure.


Tankless water heaters are beneficial for house holds of several different sizes who use a lot of water with smaller water supply units.

Take note that the water would not be hot when you run too many water heaters/showers/appliances at a time as it surpasses the flow rate. Choose the proper one for your house and according to the plan.