10 Tankless Water Heater Myths That Need to Be Completely Debunked

Water tank

Homeowners may not be aware of every aspect of a tankless water heater and thus they end up avoiding the innovation it brings. Not everything that you hear about Tankless heaters is true and without verifying them, there’s nothing to be scared of. Any doubts on the pricings savings, maintenance, performance, and capacity – we’ve busted them all. 

To know all about the myths and why they are wrong, just keep reading below.

1. All models are mostly the same

Let’s get to reality. No, not all the models are the same at all. In fact, most of them are different from each other. In fact, there are several types of tankless models that are available all over the world.

There are three types of heaters according to the ignition. These include the electric, gas and hybrid water heater models.

2. All of them have a low water supply

Now, this is another absurd myth. On any day, the water pressure from your faucet determines if you have a low water supply or not. So if you are living at a high altitude, you will get low water pressure.

So, blaming your heater about low water pressure is never the right thing to ask for.

3. They do not provide water at safe temperatures

This may be a problem with traditional storage-based models. It happens mainly because the water stored inside is at regular temperatures and overheating may increase the temperature easily. But it’s not the same with the tankless models.

Here, the presence of a thermostat controls the heating, and then it gets you a safe temperature.

4. The tankless heaters do not need maintenance

Water tank

Almost every electronic device requires proper maintenance and work to make it work well. But, it is important that you keep flushing and cleaning the heater from time to time. Corrosion may happen at any time because of hard water present in your locality.

In such a case, it is important to keep regularly maintaining the water. 

5. The price is not affordable for some

Eh?? Comparing the price with the storage based heaters can be initially higher, but the overall cost is pretty much the same. This is mainly because; the tankless heaters do not have to work on heating a lot more water.

However, the daily maintenance costs for the tankless heaters are much lower than any traditional model.

6. You can never expect a steady hot water supply

Another big myth about the tankless heaters is that they cannot provide you steady hot water supply. As a rule of thumb, the hot water is distributed uniformly within the heating elements. So, the levels of water pressure remain the same in both the input and the output pipes.

7. Instant hot water delivers at the sink

The mechanisms of the tankless heaters are different than any traditional model. Here, the water gets heated through the pipe. So you can always expect endless hot water from the faucet.

However, there is still some water already present on the faucet pipe. So the moment you turn on the faucet, the cold water runs out. So the hot water is not instant at the sink.

8. A tankless heater can give you large savings

You can expect regular savings after a certain point in time once you start using the product. But, expecting immediate savings will never happen. They may indeed save you bucks, but it will happen after a long time.

9. All of them run on natural gas

Not at all! As we’ve mentioned above, there are three types of ignition available with the tankless models. They are the gas-based, the electrical based units and the hybrid models. So you can choose any of them.

10. The venting is mandatory and it consumes space

A simple PVC pipeline is just all you need for a gas-based model. But for the electric tankless system, you do not require any type of venting at all. There is no emission present and the venting just can be small as well. But even the best electric tankless water heater needs stable electrical service to provide for the very high amp draw. This is regardless of how efficient a system is by the way.

Frequently Asked Questions:

1. Is a tankless water heater worth it?

Of course, they are worth everything that you pay for the heaters. Not all of them are overpriced, but you can spend a few bucks to save yourself from wasting time, energy and also effort. The tankless water heater will save up a lot of money as it provides instant hot water for an endless run.

2. Which is a better water heater or tankless?

The water heater is composed of the tank and it will only start providing hot water when the tank is fully heated. On the other hand, the tankless heater is more conventional on a few occasions. It starts providing you continuous flow of hot water just after a few seconds from when you turn it on. This will allow you to get faster delivery of heated water.

3. Can a tankless water heater fill a tub?

This will completely depend on two factors such as the capacity of the heater and the quantity of water to be stored in the tub. The capacity of the heater is marked as the gallons per minute which are also the rate of flow. If the rate of flow is high, the time taken to fill up a decent tub will not be so much. However, if the rate of flow is low, it will take a lot of time to fill up a big tub,

4. What size tankless water heater do I need for a shower?

Usually, shower faucets consume more water than any regular water faucet available in your home. So if you are running two shower faucets at the same time, you will require the heater with more flow of water. The best idea out of all will be to choose a product that features at least 5 gallons of hot water. On top of this, there should be an adjustable thermostat.


The tankless systems are easier to control and operate. But because of some absurd myths, people are still not getting out of the outdated technology. Busting such myths is important and you can go through the entire article for more.

About Michael John

My Name is Micheal John

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