Can you run out of hot water with a tankless water heater?

 Quite a few years back, when I was buying my first tankless water heater, I was inquisitive to know whether a tankless version of hot water will never run out of water?

I know quite a few first-time buyers go through a similar query now and then, right?

Don't worry, today I'm gonna end this age-old debate about the claims made by top brands including Rinnai, Rheem, Noritz, EcoSmart, etc regarding an endless supply of hot water, etc.

But, before that, please allow me to introduce to you a tankless water heater in the best possible manner that I could.

As the name suggests, a tankless hot water heater is a small, compact, and durable device that claims to provide you an endless supply of hot water with a twist in the claim.

These tankless little beasts are highly efficient and can last up to 20 years which is almost twice that of a tank-styled hot water heater.

Moreover, a tankless hot water heater can save you a tangible amount on heating bills in the long-run as it heats the water only when it is required by the end-users' like you and me.

In layman's terms, the standby heat loss to the environment is almost negligible as it doesn't save the hot water in a tank.

Well, tankless water heaters are mainly of two types based on the type of fuels.

Both electric and gaseous tankless water heaters have become quite popular in the United States in recent times because of the technology, convenience, longevity, and of course, cost-effectiveness.

Gas tankless water heaters are further segregated into propane tankless heaters and natural gas tankless heaters.

Not only that but also tankless models are available for under-sink uses and the whole house uses, that is, you can differentiate them on type of uses as well.

On the basis of the location of installation, you can differentiate them as indoor tankless heaters, and outdoor tankless heaters.

ALRIGHT, enough of the introduction.

Yes, Tankless Water Heaters Can Provide Endless Supply Of Hot Water With Sting Attached To It...

Let's understand it this way, theoretically, a tankless water heater can never run out of hot water irrespective of where and when you're using it.

The reason is quite simple, a tankless heater has no such water supply that it can deplete.

Gotta, my point?

To understand it in a better way, we'll have to go back to a tank-styled water heater.

Just think of a storage-tank water heater like the one that you've been using right now or have used in the past.

What a tank-styled water heater does is, heats the water and stores it in the tank for ready to use purpose.

It goes without saying that the stored water will lose heat through the tank popularly termed as "standby" heat loss.

So, in order to keep the hot water ready for use, it needs to be heated again and again.

Since, the storage tank comes with a certain capacity so once you'll open the tap, shower, faucet or any other fixture, the supply of hot water will start to deplete.

And, the worst part is, if the hot water runs out, you'll have cold or lukewarm water until the water heater can heat up a sufficient new supply.

Trust me, I find it a major drawback of conventional tank-style water heaters, and it was definitely, one of the many reasons that forced me to upgrade to a tankless model like this one which is not only equipped with advanced and innovative technology but also comes an affordable price.

So, the manufacturer of tankless water heaters understood the end customers' problem and did some innovation to come up with the solution in the form of a tankless water heater.

What actually a tankless water heater does is, heats the water instantly and on-demand.

And, as a result, no storage and no standby heat loss.

So, when you open any fixture, the tankless heater initiates the process of heating the water heading towards the tap, faucet, shower, etc, and the best part is, it keeps doing that as long as you need the hot water.

The only drawback that I get irritated with a tankless water heater is that you need to have to wait for few seconds until the hot water reaches you.

Depending upon the type of model you've opted for, the wait time will vary somewhere between few seconds to up to a minute.

If you too get irritated with the wait time, then you can try this high-quality model, it has literally very less wait time, and I've also received good feedback from my clients about this model particularly.

You'll have a delay only at the start and once the hot water starts reaching you, then you won't run out of hot water because you aren't depleting a hot water tank.

But Tankless Water Heaters Can Be Overwhelmed...

I hope that you're know clear that tankless water heaters can't run out of water, right?

Let's dig further and see what all we can find out against this very strong claim.

Tankless water heater like any other products available on the market has its own share of pros and cons.

To be honest, a tankless water heater can run into a different problem, so what's is it?

It's something related to flow rate which is measure in gallons per minute.

Trust me, it's a big bottleneck for a tankless water heater and can completely ruin your experience if the sizing of a tankless water heater isn't done correctly.

The heating ability can be adversely impacted if you're running multiple fixtures simultaneously in such a way that it exceeds the flow rate capacity of the device.

In simple words, a tankless water heater is sized for a specific flow rate, that is, the amount of hot water requested at a particular time.

So, the game revolve around the correct sizing of a tankless water heater.

And, the best way to do so is to hire a professional as he can determine the amount of water that your house would needing at a particular time and can install the tankless hot water heater accordingly.

And, as a result, you'll not lose out on energy efficiency.

I always suggest my clientele work with a certified water heater installer in order to reap maximum benefits out of a tankless hot water heater.

However, if you're on a shoestring budget and don't want to hire a professional, then you can switch over to an e-commerce website similar to amazon and read the customer reviews that will help you to understand which tankless heater size will work for you and which will not.

Wrapping Up

First and foremost, I would like to thank you for being with us till the end.

Secondly, I would like to bring to your notice that I along with my core team have put loads and loads of effort into coming up with this idiosyncratic superlative piece of information.

And, in case, you got benefitted from it, then please do share this piece of information with like-minded people.

So, to answer the question, can you run out of a hot water tankless water heater, I would say, NOT REALLY, if the sizing of the tankless water heater is done properly under the guidance of an expert.

That's all, from my side.

See you soon :):)