Tankless Water Heaters For 3 Or More Bathrooms

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So, are you looking for the best tankless water heaters for three or more bathrooms?

Well, in this post, I would be walking you through some of the best tankless water heaters for large homes available on the market, right now.

Moreover, I would be throwing light on various aspects of a tankless water heater in order to help you make an informed buying decision.

Lastly, I would be responding to the queries related to the tankless water heater review in order to help you clear your doubts to the best of my capabilities.

But, before that, I would be needing a small help on your end.

Would you help me?

Well, all you need to do is answer a couple of questions that I would be asking you in a while.

So, which is your favorite tankless water heater brand?

How much are you willing to spend on your tankless water heater?

Furthermore, how often do you prefer to read a product review?

Enough of questions, right?

So, without any further ado, let’s begin…

Editor’s Choice

Well, to be honest, all the tankless water heaters that made our list are of high quality, and worth the investment.

However, below are some of my favorite heaters that I recommend wholeheartedly.

Top 10 Best Tankless Water Heaters Review

Before we dive deep into an in-depth discussion, please allow us the steps that we follow to shortlist the products, in this case, is a tankless water heater, for review.

To begin with, our core consultant comes with a set of parameters on which we’ve to evaluate the product.

Each evaluating parameter is given a certain weightage depending upon its ability to influence buyers’ decisions.

During the evaluation process, each tankless water heater has been given certain marks against the evaluation parameters depending upon its performance.

Finally, we sum up the marks and review the top 10 scorers.

Please do mail us in case, you still have a doubt or a query related to our evaluation process.

[Related]

EcoSmart ECO 27 Electric Tankless Water Heater

To begin with, EcoSmart ECO 27 is one of my favorite electric tankless water for sure, and there is more than one reason for it.

The best thing about the electric tankless water heater is that it provides you endless hot water, and of course on-demand.

Unlike a traditional water heater wherein you need to store hot water, the EcoSmart ECO 27 heats the water as it passes through the unit.

Before opting for an electric tankless water heater, I was using a traditional water heater, and let me tell you, the latter takes up lots of space.

So, if your bathroom is small and compact, then definitely, after installing a traditional water heater, you would be left with very little space.

The EcoSmart ECO 27 has solved the problem of space as well, and the credit goes to the unique and sleek wall-mounted design that frees up to 90 percent floor space.

And, as a result, you can more space for storage.

The on-demand heating capability of ECO 27 makes it highly cost-efficient as electricity would only get consumed when you would be needing it.

Many of you might not be aware of the fact that EcoSmart features the most advanced modulating technology.

As per DOE, the ECO 27 can help you save up to 50% on water heating costs by not only cutting down on heat loss but also, by turning on the heater when you need it.

The installation process isn’t tedious or time-consuming, and in spite of you being a first-time user, you can easily expedite the process on your own.

Not only does the heater comes with an activation flow of 0.3 GPM but it also gives you better control with a 1-degree increment.

The heater is a unique blend of efficiency and durability.

[Related] EcoSmart Eco 27 Unbiased Review

Stiebel Eltron Tankless Water Heater

The Stiebel Eltron Tempra 24 Plus Tankless Water Heater is packed with idiosyncratic features to help you achieve optimum results in an epigrammatic span of time in a hassle-free manner.

In spite of the surge in demand for hot water, the Stiebel Eltron will provide an uninterrupted supply.

The water flow is adequate and will suffice your need for sure, and the credit goes to the Advanced Flow Control German patented technology.

However, you might experience a slight reduction in flow if the hot water demand exceeds the capacity.

Well, the Tempra 24 claims to be 15 to 20 percent more energy-efficient as compared to the traditional electric tankless water heater.

Since an electric tankless water heater provides hot water on demand and doesn’t use a tank like a conventional heater to save hot water so there isn’t any heat loss to the environment.

And, as a result, you can expect a good saving from it as well.

On average, a traditional water heater loses 15 to 20 percent of its total energy to the environment, and the technical term used for such a phenomenon is standby heat loss.

The device works silently and doesn’t produce sound pollution.

It uses a digital display for accurate temperature delivery as well as maximum energy efficiency so even though you’re a newbie, you’ll not face any problem in operating this electric tankless heater for sure.

Since the heater comes with an intelligent self-modulating technology so energy saving wouldn’t be a problem for you or anyone else.

Lastly, the heater is small, compact, and durable, and so you don’t require any venting, indeed.

All in all, a great electric tankless water heater is offered at an affordable price to help you achieve an optimum result.

Bosch Electric Mini-Tank Water Heater

Frankly speaking, the brand BOSCH doesn’t need any introduction as it has proved its mettle time and again.

The Bosch Electric Water Heater comprises a 7-gallon mini-tank that can easily fit in your bathroom, even under your sink, and the best part is, you can install it in both vertical and horizontal positions.

Well, with a heating capacity of 1440 watts and a temperature range of 65-145°F max, the heater is bound to deliver high-performance effortlessly, and for sure.

To increase the energy efficiency of the unit, the manufacturer has inculcated CFC-free foam insulation.

The installation process is not only newbie friendly but also, less time-consuming, indeed.

The good thing about this heater is that it can be shelf, wall or floor mounted.

For getting the hot water, all you need to do is to tap into the cold water line and install the water heater directly at the sink, and you’re done.

You don’t have to buy temperature and pressure valves separately as they are included in the package.

The Bosch Tronic 3000 T point-of-use electric mini-tanks come in three compact sizes, and you can either wall hung or floor-mount them as per your requirement.

The Bosch Tronic 3000 T would definitely be an ideal solution for small spaces including:

Apartment, RVs & Boats
Basements, Garages & Pool Houses
Kitchenettes & Patio Sinks

Moreover, the heater is backed by 6 years warranty on the unit and a 2-year warranty on parts that show the confidence and trust of the manufacturer in its offering.

Rinnai V65EN V65EN-Natural Gas/ 6.3 GPM Outdoor Tankless Hot Water Heater

A Rinnai Tankless Water Heater promises you to supply endless hot water without any hassle.

The heater comprises ThermaCirc360 technology that is meant to recirculate water through the pipes to provide you hot water in an epigrammatic span of time, effortlessly.

On top of it, the small, compact, and uniquely designed heater can be easily installed at even non-traditional spaces including an attic, crawl space, or even a closet.

So, in spite of you having a shortage of space, you can easily reap the benefits of this tankless water heater.

Just for your information, the Rinnai tankless water heater is as small as the size of a small suitcase so your small home office can easily afford to install this idiosyncratic superlative water heater.

Since you heat the water only when you need it so heat loss to the environment is almost negligible, and as a result, you can save up to 40 percent on the energy cost.

Not only that, but also Rinnai tankless water heater is equipped with advanced technology including Wi-Fi monitoring, and thus, addresses the issue at the earliest in order to help you with receiving uninterrupted hot water supply.

The manufacturer claims the average life expectancy of this heater to be 20 years which is way more than 10 years life expectancy of a traditional heater.

And, the best part is, the Rinnai Tankless water heater is replicable so components can be easily swapped so you don’t have to always buy a new unit.

[Related] Rinnai Tankless Water Heater Review

EcoSmart ECO 11 Electric Tankless Water Heater

The EcoSmart ECO 11 is an electric tankless water heater that comes with a lifetime warranty that depicts the confidence and trust of the manufacture in its offering.

On top of it, the manufacturer claims to save up to 60 percent on the energy-saving cost which is definitely something to brag about, isn’t it?

Furthermore, the ECOSMART tankless water heater uses patented modulating technology and design in order to help you achieve an optimum result.

Many of you might not be aware of the fact that the heater claims to be 99.8 percent energy-efficient.

Not only the compact and portable unit will save you a good amount of space but also, a lot of time.

In fact, the point-of-use installation and on-demand heating cut down on waiting for hot water.

Another benefit of on-demand heating is that there wouldn’t be any wastage of heat to the environment as you’re not storing hot water in a tank.

Well, depending on the inlet water temperature, the EcoSmart ECO 11 can provide between 1.3 and 3.1 gallons per minute which are definitely good for providing hot water to a bathroom, small sink, and other low-flow applications.

In short, it’s a great product, and worth the investment, rest is your call.

Titan Electric Tankless Water Heater

The Titan Electric is definitely among the most popular models for a home office or even an average-sized home.

Like the aforementioned electric tankless water heater, it also claims to provide you endless hot water for your home, apartment, or office.

It claims to help you save up to 60 percent on the energy cost as the hot water isn’t stored in a tank and so no heat loss happens to the environment.

So, if you’re still using a conventional water heater then it’s a high team to replace it with Titan N-120 or other similar tankless water heaters because by doing so, you’ll not save only money but also time.

As per my knowledge and experience, the Titan N-120 works best for warmer climates where the incoming water temperature is above 65 degrees Fahrenheit.

Rest assured, definitely, an affordable water heater that comes with almost the ingredients that you might be looking for in your best tankless water heater.

If the unit misses out on something or we’ve missed out on any important feature to discuss, then do let us know in the comment section.

Rinnai RU199iN Tankless Water Heaters

The Rinnai RU199iN is yet a great offering from the brand, and is not only very powerful but also comes with huge capacity.

In simple words, once you’ve installed this uniquely designed water heater, you can expect endless water for your entire home.

You can expect the hot water flow rate to be up to 11 GPM.

The heater uses ThermaCirc360 technology that recirculates the hot water through your apartment pipes to help you get the hot water in an epigrammatic span of time.

The compact and sleek design helps you to install this heater in non-conventional spaces including an attic, crawl space, or even a closet.

Since you heat water only when you need it so you can expect the electricity bills to drastically reduce up to 40 percent as compared to a traditional water heater.

It comprises smart technology including Wi-Fi monitoring which helps you to detect the issues and solve them at the earliest to help you get an uninterrupted supply of hot water.

As compared to the conventional water heaters that might last for not more than 10 years, you can expect Rinnai RU199iN to last up to 20 years which is definitely something to brag about.

Rheem RTEX-18 18kW 240V Electric Tankless Water Heater

The Rheem RTEX-18 is compact, durable, and uniquely designed for small spaces.

In order to maintain a consistent outgoing water temperature, the Rheem RTEX-18 is equipped with self-modulation.

Since it offers 3/4” connectors so you’ll not face any compatibility issues with a flex hose installation.

The heater is quite flexible and allows you to change the temperature in the range of 80 and 140 degrees Fahrenheit with one-degree increments.

It also comes with a copper immersion heating element with a brass top in order to ensure durability.

Not only the installation process is newbie friendly but also, the heater is capable of delivering a flow rate up to 4.4 GPM.

In spite of its high-quality and power-packed features, the heater is available at an affordable price so why not give it a try?

Eemax EEM24013 Point-of-Use Electric Tankless Water Heater

Like the aforementioned tankless water heaters, the Eemax EEM24013 also heats the water on demand so the heat loss to the environment is minimal.

Unlike the conventional water heater that stores water, the electric tankless water heater provides you with instant, consistent, and endless hot water.

The Eemax EEM24013 comes with innovative self-modulating technology that makes it very flexible, and as a result, the input energy can be easily adjusted as per the hot water requirement.

The compact and small size makes it possible for the heater to be installed in a small space as well.

In layman’s language, the EEM24013 can provide hot water for a sink in a cold climate.

On the other hand, in the warmer climate, it is capable of providing water for a sink and a shower for your apartment.

Lastly, the EEM24013 is backed by 5 years of warranty for leakage and 1 year for parts.

[Related] Eemax Tankless Water Heaters Review

ECOTOUCH ECO90 Point-of-Use Electric Tankless Water Heater

The ECOTOUCH ECO90 is one of the most affordable electric tankless water heaters that made our list.

Moreover, you don’t have to wait anymore for hot water as the ECO90S electric tankless water heater provides you with instant hot water without any temperature fluctuation.

The intelligent self-modulation technology varies the input power as per the variation in the output water flow.

With minimal heat loss to the environment and an on-demand hot water supply, you can save a huge amount on your power bills as compared to a traditional water heater.

Trust me, if you’re using the ECO90S electric tankless water heater, then most probably, you’ll not have to deal with a cold water sandwiches.

On top of it, the unit has a longer lifespan because of the heater’s ability to avoid any corrosion inside the pipe.

The heater is safe and secure, and the chances of leakage are very minimal as the device is designed in such a way that the electricity and water lines run separately.

Since the ECO90S tankless electric water heater comes with a digital display and a touch control panel so you’ll have better control over the device, and temperature setting wouldn’t be a tedious job either.

With 2.9 PSI-87 PSI operating water pressure and 1.5 Gallons Per Minute flow rate, the ECO90S is bound to deliver high-performance.

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater

So, here I come with one of my favorite indoor tankless water heaters, and trust me, most of my clients have given great feedback about this idiosyncratic superlative heater.

The manufacturer has given top priority to the safety measures and it is clearly depicted from the features such as freeze, overheat, surge protection, and troubleshooting diagnostic codes.

The T-H3-DV-N is highly powerful and can cater to the need of even a salon or restaurant without any hassle.

Well, with gas inputs of 199,000 BTU, the heater can suffice the hot water needs of four bathrooms in a warm climate and three bathrooms in cold climatic conditions.

In simple words, the heater is a unique blend of compactness, space-saving, and energy-saving.

The gas-powered heater is not only energy star certified but also, possesses a flow rate of 10 GPM.

Best Tankless Water Heaters For 3 Or More Bathrooms | Buyer’s Guide

Well, whether you’re a first-time buyer or a seasoned professional, the piece of information that we’re gonna share with you will definitely help you in making an informed purchase decision.

How Can I Get The Most Out Of My Tankless Water Heater?

Frankly speaking, I can’t think of my office or my home without a water heater.

I think it wouldn’t be wrong if I’ll say that water heaters have become the backbone of our comfortable lifestyle.

Be it a shower, dishwasher, or even washing machine, hot water is definitely something that you would be needed, right?

Mainly, there are two types of water heaters that you’ll come across, that is, a traditional storage water heater, and a tankless water heater.

The traditional storage water heaters are the ones that hold the hot water in a storage space or a tank until it is required.

On the other hand, a tankless water heater heats the water only when you need it.

Many of you might not be aware of the fact that tankless water heaters have been quite common in Europe for decades.

However, the USA has also started seeing a surge in its demand recently.

To be honest, many of the households are shifting to the tankless water heater from its traditional counterpart because of the benefits that it comes with.

If you would’ve ever used a traditional storage water heater then definitely, you would be aware of the drawbacks that it comes with.

Storage-based water heaters aren’t economical because a lot of heat is lost to the environment when the hot water is stored.

Trust me, even though you’re using a thermally insulated tank for hot water storage, you can’t stop heat from getting lost to the environment.

The best that you can do is, slow down or delay the heat loss.

In simple words, a lot of energy got wasted if you’re using a storage-based water heater.

On the other hand, you can save a lot on your energy bills if you’re using a tankless water heater.

Almost all the tankless water heater that we’ve reviewed so far promises you an endless supply of hot water.

You don’t have to worry about the problems that come along with a storage tank if you’re using a tankless water heater.

The bottleneck for a storage-based water heater is the limited supply of hot water that it can offer.

If your hot water demands exceed the volume of water that a storage-based heater can hold, then you don’t have any option but to wait for the water to get heated again.

In this entire process, you would be wasting a lot of your time, isn’t it?

Turn Down Your Thermostat

Yes, you heard it, RIGHT.

If you’ll buy a tankless water heater then you’ll find that the manufacturer has set the thermostat at a temperature of 140 degrees Fahrenheit.

Don’t worry, it’s an industry /common standard.

However, you need to optimize this temperature as per your requirements.

What I’ve found is that most of the households don’t need the temperature to be so high, indeed.

In fact, if you’ll bring the temperature down to 120 degrees Fahrenheit, there wouldn’t be any tangible difference at all.

By doing so, you’ll reap mainly two benefits.

First and foremost, you’ll save on your energy bills.

Secondly, if you’ve kids and pets in your home, then they will be on a safer side and well protected from accidental burns from boiling water.

Turning down the thermostat will also ensure the longevity of your tankless water heater as the build-up of minerals inside the heater would reduce.

To some extent, corrosion inside the pipes and heater’s components would also get reduced.

As per my knowledge and experience, I can affirm that for every 10-degrees reduction in thermostat temperature, you would be saving up to 5% on energy bills.

Cut Your Water Consumption

One of the easiest and perhaps the best way to get the best out of your tankless water heater is by doing a tangible reduction in your water consumption.

By doing so, you would be reducing your GPM requirements.

If you’re able to cut water consumption all around the house including shower, washing machine, dishwasher, then definitely, you would find a tangible reduction in your energy bills for sure.

By using a low-flow showerhead, you can definitely reduce the hot water requirement for your shower.

Frankly speaking, if you’re successful in cutting half the water out of each shower then you can run an additional one on the same GPM.

Well, many of you might be wondering, why I’m emphasizing more on cutting hot water for a shower, right?

To be honest, showering is one of the most extensive hot water draws that most homes have, and definitely, it is one of the accurate ways to measure how large a water heater we need.

Frankly speaking, saving water isn’t as tough as it seems to be.

For example, turn off the faucet while you’re brushing your teeth.

In fact, by installing an aerator in the faucets across your home, you can cut the flow.

What I do for reducing hot water demand is wait until my washing machine is full or my dishwasher is fully loaded before turning it ON instead of washing a half load or washing my dish by hand.

Trust me, the aforementioned simple tricks have helped me, and I hope they will help you too.

I refrain from using a pre-wash setting, and for me, in most circumstances, the economy setting works fine.

Your Tankless Water Heater Size Does Matter

Trust me, sizing your tankless water is very important, and you should take it seriously.

I’ve seen my clients struggling with their tankless water heater, and in most of the cases, the reason was that they haven’t bought a powerful unit.

Let’s understand it with an example.

If you’ve added up your usage points and get 3 GPM as your baseline, then buy a tankless water heater that can put out at least 5 GPM.

However, if you live in a colder region then I would suggest you should take some more margin to tackle the requirement in an effective way.

Nothing Wrong in Taking Help of a Professional

Well, if you’re buying a tankless water heater for the very first time, then my suggestion to you would be to take help from a professional.

In fact, you can begin optimizing your unit the very time it got delivered to your doorstep.

The benefits of taking help from a professional are not only limited to the installation of the tankless water heater correctly and effectively.

But also, helping you to choose the tankless water heater that not only caters to your needs but also falls well within your budget.

I took the help of an expert when I was buying my very first tankless water heater, and along with other benefits, he also ensured that all of my piping is adequate to accommodate the chosen water heater.

Insulate Your Piping

Many of my clients have asked me time and again, whether insulating all the pipes would be beneficial?

Well, to be honest, it does help for to what extent depends.

The benefit of insulating all your exposed pipes would definitely help you to maximize the potential of your system.

What I’ve experienced so far is by insulating your hot water pipes, the water would be somewhere 2 to 5 degrees warmer when it reaches the faucet.

Definitely, it would save you on energy bills in the long run.

Insulating the exposed pipes wouldn’t cost you a fortune if you’re doing things in the right way.

Even low-cost self-sealing sleeves which can easily slip over your pipes can do the trick for you.

If you wanna take my advice, then I’ll say you to start from the pipes that are exposed in your basement and work upwards.

I hope and believe that by following the helpful tips that we’ve shared so far you would be able to optimize your tankless water heater to such an extent that you can easily achieve the result as per your expectation.

Things To Look For When Buying An Affordable Tankless Water Heater For Larger Homes

Well, in this section, I would be throwing light on various aspects of a tankless water heater in order to help you make an informed buying decision.

It’s my humble request that you don’t skip this section as it is full of information related to the tankless water heater.

Well, in terms of electricity expenses, your water heater is definitely, one of the most expensive appliances that you’ll have in your home.

In many cases, it accounts for almost 20 percent of your home energy uses.

And, for that reason, at times, people like you and me get confused over buying a water heater, isn’t it?

You want to make a smart decision so that your investment pays off in the long run.

All you need to do is to stay with us so that we can explain everything from the scratch.

Does it make sense?

Before we proceed further, it is really important for you to understand the difference between a tankless water heater and a conventional water heater.

Tankless water heaters are the ones that don’t come with a water tank.

On the other hand, conventional water heaters mostly comprise of a tank that is bigger and bulky.

Definitely, the lack of a tank makes the tankless water heater compact and small, but at the same time, you also need to understand that it completely changes the way the device operates.

On the other hand, a tank water heater is basically a big holding tank with a heating coil in the bottom.

Well, water is drawn from the top, since heat rises, and the heating coil works to raise the temperature of the whole tank when new water is added.

Needless to say, it needs to run constantly in order to keep the tank full of water hot and supply as per your requirement.

But, the working principle of tankless water varies drastically.

In fact, a tankless water heater is basically a box around a heating coil.

Water passes through the heating elements, rather than surrounding them.

By the time, the water goes from one end of a tankless unit to the other, it’s at temperature.

The best part is, you don’t have to heat the water again and again.

Just turn on the heater, when you’re in a need of hot water, that’s all.

Warranty

Always good to have a tankless water heater that comes with a warranty.

The more the warranty period the better it is.

In simple words, a longer warranty duration shows the trust and confidence of the manufacturer in its offering.

Nonetheless, my advice to you would be to prefer a tankless water heater that comes with at least a year of warranty over the one that doesn’t come with any warranty.

Price

Well, when it comes to buying a tankless water heater, definitely, price plays a crucial role, and you can’t ignore it all.

For example, if I’m on a shoestring budget, I can’t afford a high-end tankless water heater irrespective of the fact that I liked the product and its features.

So, always look for a tankless water heater that not only caters to your needs but also falls well within your budget.

Anti-Scale Device

To be honest, there are brands in the market that advertise features that are supposed to reduce the buildup of mineral scale at the bottom of the tank by swirling the water.

I’ll not deny the fact that scale can shorten the life of the heating element, but at the same time, my suggestion would be to refrain from investing in fancy features to get a tankless water heater that lasts.

All you need to do is to look for a water heater that comes with a good warranty period as well as includes a longer and thicker element.

Brass Vs. Plastic Drain Valves

Well, many of you wouldn’t be aware of the drain valves, and might be hearing this word for the first time, isn’t it?

These valves are situated near the base of the water heater for a garden hose that drains the heater.

Always look for brass drain valves as they are more durable than their plastic counterpart.

Glass-Lined Tanks

Well, glass-lined tanks are definitely good to have as they are designed specifically to reduce corrosion.

And, as a result, the tank would’ve got a longer lifespan.

Digital Display

Always good to have a tankless water heater that comes with a digital display.

The digital display would help you in monitoring levels and customized operation.

In fact, the digital display gives the end-users better control over the tankless water heater and makes the operation smooth and hassle-free.

Water Heater Brands

I always recommend my clients to give preference to a branded product over a non-branded one.

It might be possible that non-brand products have less upfront cost, but might become a costly affair in the long run.

On the other hand, a branded product is more reliable and comes with additional benefits such as post-sales service, quick servicing, etc.

However, if you’ve had a great experience with the non-branded product, be it a tankless water heater or something else, we would love to hear and share your experience with our readers.

How to Select the Right Size Tankless Water Heater?

If you’re not aware of the process of rating a tankless water heater then please allow me to explain it to you.

Frankly speaking, a tankless water heater is rated by the maximum temperature rise at a given flow rate.

So, in order to find the size of the water heater that suits your current requirement, all you need to do is to determine the flow rate and the temperature rise you’ll need for its application.

But, at the same time, my suggestion would be to never try and save money by under-sizing your tankless water heater.

Number of Devices

First and foremost, you need to determine the maximum number of devices that you’re planning to run as well as their total flow rate.

In the next very step, you need to add their flow rates (Gallons per Minute).

Once you’ve got this number handy with you, just look for a tankless water heater that suffices this number.

In case, you got confused then please allow me to explain it with the help of an example.

Let’s say you want to run a hot water faucet with a flow rate of 0.50 gallons per minute and a shower head with a flow rate of 2.6 gallons per minute.

So, your total requirement in terms of gallons per minute would be 3.10 gallons per minute.

In case, you’re planning to buy a tankless water heater with a lower flow rate than the one mentioned above, then all you need to do is to reduce the flow rate of the faucet by installing low-flow water fixtures.

Temperature Rise

Determine the required temperature rise, and for it, you need to subtract the incoming water temperature from the desired output temperature.

Unless you know otherwise, my suggestion to you would be to assume that the incoming water temperature to be 50 degrees Fahrenheit.

On the other hand, if you live in a warmer climate then things would definitely be different.

In fact, the water temperature will likely be much higher.

Furthermore, for most of the uses, you’ll want your water heater to be around 105 to 115 degrees.

Well, in such scenarios, you definitely need a demand water heater that produces a temperature rise of 55 degrees.

Sizing

Honestly speaking, an average shower would be between 104 and 106 degrees and uses 2.6 gallons of water.

For example, let’s assume the temperature of the water coming to your home is 40 degrees, and your requirement is to produce enough hot water to run 2 showers at the same time.

So, what temperature rise would you be needing to accomplish the same?

Any guesses?

As per my knowledge and experience, you would be needing to raise the incoming water temperature from 40 degrees to 105 degrees.

You must be able to heat at least 5.2 gallons of water.

In simple words, you would be needing a tankless water heater that is capable of producing at least a 60 degrees rise in the temperature at 5.2 gallons per minute.

I hope you’re clear with the concept, right?

Flow Rate

So, here I’m with the chart that shows the range of water usage range as well as average water temperatures for various fixtures.

FIXTURE	AVERAGE FLOW GPM	AVERAGE TEMP.
Tub	4.0 GPM	102°F
Shower	2.5 – 3.0 GPM	104°F
Washing Machine	2.0 GPM	120°F
Dishwasher	1.5 GPM	110°F
Kitchen Sink	1.5 GPM	110°F

Tankless Water Heater Benefits

Let’s have a quick look at the benefits of a tankless water heater.

I hope after knowing about these benefits, you’ll prefer to buy a tankless water heater rather than a traditional water heater.

Unlimited Hot Water

If you would’ve ever used a traditional water heater then definitely, you’ll agree that running out of hot water isn’t a big deal, right?

Moreover, If you’re going for a shower, post filling your dishwasher and washing machine, then the probability is very high that you might have to face a shortage of hot water.

The irony is that you’ve to wait for the whole tank to get heated again.

And, the worst part is, the process is slow and not so convenient.

To be honest, tankless water heaters can produce hot water as long as you want, but they do come with limitations in terms of the amount of hot water that they can supply at once.

However, if your demand for hot water is under their capacity then definitely, you can expect an uninterrupted supply of hot water.

But, at the same time, I wouldn’t deny the fact that there would be a lag of a few seconds/minutes between turning on the hot water and having it actually come out.

Nonetheless, once it started coming out it would be flawless.

In simple words, if you’re planning to buy a tankless water heater then you must understand that limitation would be on the amount of hot water that you can take at one time and not on the run time.

Deals Perfectly with Scarcity of Space

Since tankless water are extremely compact so it can be easily stored in a small space without any hassle.

You might not believe but the fact is that many tankless water heater models are so small and compact that they can easily fit in the cabinet next to your sink.

Moreover, you can simply mount it on the wall in your basement.

So, if you own a house, apartment, or even an office that is small and not spacious enough to occupy a traditional water heater then why not try a compact and small tankless water heater model.

Ease of Dealing with Leakage

At times, dealing with leakage could be a pain in your ass.

Correct me, if I’m wrong.

However, dealing with leakage problems could be easier if you’re using a tankless water heater.

Because in such situations, all you need to do is to shut the water supply off.

And, if you’ve got the latest tankless water heater model, then trust me, your work would be much easier.

The new models come with smart shutoffs if something goes wrong.

On the other hand, if you’re using a conventional water heater then chances are very high that things can turn out to be bizarre, as in the case of leakage, you would’ve to deal with at least 50 gallons of water spilling out without any prior intimation.

A Big Savior…

Yes, you heard it, Right!

A tankless water heater is a big savior when it comes to electricity bills.

As per the energy department, an efficient and high-quality tankless water heater can reduce the electricity bills to up to 30 percent and in some cases even more as compared to a conventional water heater.

In layman’s terms, moving to a tankless water heater from a conventional one would save you at least 100 dollars per year if NOT MORE.

Last Longer

According to the Energy Department, a tankless water heater would last for almost 20 years.

On the other hand, a conventional water heater would last for 10 to 15 years.

Tankless Vs. Tank Water Heater: Which One Should I Buy?

Let’s have a quick look at the pros and cons of both of them so that you can make an informed buying decision effortlessly.

Does it make sense?

Tank Storage Water Heater

It goes without saying that the tank storage water heaters are fairly large.

These types of water heaters are capable of holding water in the range of 20 and 80 gallons.

The biggest problem that I’ve come across with a tank storage water heater is “Standby loss”.

While you’re trying to keep your tank full of hot water ready for use, a small portion of the heat gets lost to the environment.

Pros

Affordable
Easy to install

Cons

A shorter lifespan of 8 to 15 years
Unfortunately, once the tank run out of hot water, there is a wait time that you need to deal with
Standby loss
May not be the perfect choice for those who have space constraints as it is huge and bulky

Tankless Water Heater

As we all know, a tankless water heater doesn’t comprise a tank for the storage of hot water.

In fact, it provides you with an endless supply of water “on-demand”.

They can free up your floor space as can be installed on the wall.

Pros

You can save on energy bills up to 34% as compared to a conventional water heater
Longer lifespan
Small and compact
No standby loss of heat to the environment

Cons

Expensive equipment
Installation can be tedious and time-consuming as compared to a conventional water heater
Huge upfront cost

I’m attaching a self-explanatory video for your perusal.

Tankless Water Heater Maintenance Tips

Have you ever wondered why regular maintenance of a tankless water heater is required?

But, before we dive deep into the maintenance tips, allow me to give you a piece of good news, a tankless water heater by no means requires extensive maintenance.

However, over a period of time, the accumulation of minerals from the water on the insides of the heating chamber may slowly corrode away the heating surface and reduce the efficiency of the mechanism.

Hence, to get rid of these nasty accumulations, all you need to do is to follow some simple tips that I’m gonna discuss in a while.

Flush the Water Heater

To begin with, flushing is perhaps the most basic care and maintenance activity for a tankless water heater.

And, if you’re living in an area where you’ve to face a hard water problem then definitely, you should flush your tankless water heater on a frequent basis.

I know many of the newbies reading this post would be inquisitive to know what actually flushing does, right?

The benefit of flushing your tankless water heater is that it will remove all the limescale from the appliance.

The process is popularly known as descaling.

At least, try to expedite descaling once every six months in order to keep your tankless water heater in great shape.

Either you can do it on your own and if you’ve got a scarcity of time, then you can hire a professional to perform the task.

However, if you want to own the responsibility and flush the tankless water heater on your own then you would be needing a sump pump, distilled vinegar, water, and two lengths of hose.

First and foremost, you need to shut off all the powers to your tankless water heater.

Then, remove the access panel and also, turn off the water supply.

Once done, release the pressure valve.

Well, you will use the sump pump to run the distilled vinegar in the tankless water heater until the whole unit is clean including the valves and all sediments are gone.

Moving further, rinse off the device with water properly.

The hoses are used to run the distilled vinegar and water in the tankless water heater.

Clean the Water Filter

Well, cleaning the water filter is yet another important care and maintenance activity that you need to expedite without fail in order to maintain the health of your tankless water heater.

There are quite a few tankless water heaters that come with a sediment screen for trapping large debris before it reaches the heating unit.

If I’m not wrong then these sediment screens are meant to last as long as hot water heater.

But, at the same time, you also have to keep cleaning them on a timely basis in order to remove all the sediments and debris.

Furthermore, you can soak the sediment screen in white vinegar for some time and then clean it under running water to remove all the debris.

Moreover, I would request you to exploit the device manually in order to check the location of the filter.

Or, else, you can also hire a professional plumber to clean the sediment filter in your hot water heater.

Regular Inspection is a MUST…

Frankly speaking, regular inspection is a MUST to prevent any unprecedented situation.

Also, inspect your tankless water heater from time to time.

Consider inspection of all the pipes that supply to and remove water from the water heater as a top priority in order to deal with any unprecedented event in a well-prepared way.

Don’t forget to check the heating element and all the valves to ensure that they are in good condition.

Replace the broken and damaged parts as soon as possible.

FAQs

Well, in this section, I would be responding to the queries related to the best tankless water heater in order to help you make an informed buying decision.

What is the downside of a tankless water heater?

As we all know that a tankless water heater is capable of producing an endless supply of hot water, takes less space, and also comes with a lower risk of leaking.

However, the main disadvantage of a tankless water heater is its upfront cost, that is, both the cost of the unit and the installation as compared to a tank-style heater.

Can I install a tankless water heater on my own?

Though theoretically, you can install a tankless water heater on your own still I would request you to take the help of a professional if you’re doing it for the very first time.

To be honest, there is a number of different sizes and styles of tankless water heaters, including propane, natural gas, and electric water heater.

Not only that, there are tankless water heaters models for single-room or whole-house sized models so you need to be very careful when it comes to installing a tankless water heater.

What size tankless water heaters are easier to maintain?

Frankly speaking, small-size tankless water heaters are easier to maintain as compared to the larger models.

Moreover, if you live in an area wherein supply water is hard then my suggestion would be to try using vinegar to flush your tankless water heater every 3 weeks in order to keep sediments from clogging the heater exchanger especially for small size models.

Wrapping Up the Best Tankless Water Heaters for 3 Or More Bathrooms

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

Moreover, I along with my team have put loads and loads of effort into coming up with this idiosyncratic superlative comprehensive buying guide.

In case, you’ve liked our effort and want to appreciate us then please do share this piece of information with the ones who are in need of it.

After all, sharing is caring, isn’t it?

Cutting long-story-short, all the tankless water heaters that made our list are of high quality and worth your investment.

To be honest, “best” tankless water heater is a relative term, and what might be best for you might not be for me and vice-versa.

So, always look for a tankless water heater that not only caters to your needs but also falls well within your budget.

Lastly, please do let us know your favorite tankless water heater from our review list in the comment section.

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